Term
|
Definition
. UNIT 1 EXAM
In a typical process control system, the set point is constantly changing.
A. True
B. False |
|
|
Term
|
Definition
. UNIT 1 EXAM
The flow of fuel or energy that is altered by the actuator is referred to as the manipulated variable.
A. True
B. False |
|
|
Term
|
Definition
. UNIT 1 EXAM
The measured variable represents the condition of the manipulated variable.
A. True
B. False |
|
|
Term
|
Definition
. UNIT 1 EXAM
An open-loop system uses a sensor.
A. True
B. False |
|
|
Term
|
Definition
. UNIT 1 EXAM
A load demand change will alter the value of a controlled variable.
A. True
B. False |
|
|
Term
|
Definition
. UNIT 1 EXAM
The output of the measurement device is the _____.
A. measured variable
B. feedback signal
C. neither a or b |
|
|
Term
|
Definition
. UNIT 1 EXAM
Which elements and signals of a control system do not exist in an open-loop configuration?
A. comparator
B. error signal
C. measurement device
D. feedback signal
E. all of the above |
|
|
Term
|
Definition
. UNIT 1 EXAM
An error signal develops when which of the following condition occur?
A. the set point is changed
B. a disturbance appears
C. the load demand varies
D. all of the above |
|
|
Term
|
Definition
. UNIT 1 EXAM
The _____ is the difference between the condition of the controlled variable and the set point.
A. measured variable
B. feedback signal
C. error signal |
|
|
Term
|
Definition
. UNIT 1 EXAM
The final control element is positioned by a signal from the _____.
A. sensor
B. Comparator
C. controller |
|
|
Term
|
Definition
. UNIT 1 EXAM
A _____ is an example of an unintentional factor that causes the condition of the controlled variable to become different from the set point.
A. set point change
B. Disturbance
C. load change |
|
|
Term
|
Definition
. UNIT 1 EXAM
The time from when a change is received at the input of an instrument in a closed-loop system until it produces an output is referred to as _____.
A. dead time
B. time lag
C. pure lag |
|
|
Term
C. both a and b
(capacity and type of the material from which the variable is made) |
|
Definition
. UNIT 1 EXAM
The amount of pure lag of a controlled variable is determined by the _____.
A. capacity of the material from which the variable is made
B. type of material from which the variable is made
C. both a and b |
|
|
Term
|
Definition
. UNIT 1 EXAM
_____ is the elapsed time between the instant a deviation of the controlled variable occurs and the corrective action begins.
A. Time lag
B. Dynamic response
C. Dead time
D. Pure lag |
|
|
Term
|
Definition
. UNIT 1 EXAM
_____ control takes corrective action after a disturbance occurs.
A. Feedforward
B. Feedback |
|
|
Term
C. both a and b
(open-loop and closed-loop) |
|
Definition
. UNIT 1 EXAM
The automatic control of process operations is performed by _____ systems.
A. open-loop
B. closed-loop
C. both a and b |
|
|
Term
|
Definition
. UNIT 1 EXAM
The set point typically remains unchanged in a _____ control system.
A. motion
B. Process |
|
|
Term
|
Definition
. UNIT 1 EXAM
Which of the following terms are also used for the measurement device?
A. detector
B. transducer
C. sensor
D. all of the above |
|
|
Term
E. b, c, and d
(comparer, summing junction, and comparator) |
|
Definition
. UNIT 1 EXAM
Which of the following terms are also used for the error detector?
A. error generator
B. comparer
C. summing junction
D. comparator
E. b, c, and d |
|
|
Term
C. either a or b
(either increase or decrease) |
|
Definition
. UNIT 1 EXAM
If a closed-loop servo system is in a balanced condition, the feedback signal will _____ if the set point changes.
A. increase
B. Decrease
C. either a or b |
|
|
Term
|
Definition
. UNIT 1 EXAM
A _____ is an example of an unintentional factor that causes the condition of the controlled variable to become different from the set point.
A. set point
B. disturbance
C. load change
D. all of the above |
|
|
Term
|
Definition
. UNIT 1 EXAM
The delayed reaction caused by the static inertia of the controlled variable is referred to as _____.
A. dead time
B. time lag
C. pure lag |
|
|
Term
C. both a and b
(capacity of the material and type of material) |
|
Definition
. UNIT 1 EXAM
The magnitude of the dynamic response in a closed-loop system caused by the static inertia of the controlled variable is determined by the _____.
A. capacity of the material
B. type of material
C. both a and b |
|
|
Term
|
Definition
. UNIT 1 EXAM
The elapsed time between the instant a deviation of the controlled variable occurs in a closed-loop, and when the corrective action begins is referred to as the _____.
A. time lag
B. pure lag
C. dead time |
|
|
Term
|
Definition
. UNIT 1 EXAM
_____ control has the greatest effect on compensation for unmeasurable disturbances.
A. Feedforward
B. Feedback |
|
|
Term
|
Definition
. UNIT 3 EXAM
The controlled variable must deviate from the set point in an on-off controller to cause controlled action to occur.
A. True
B. False |
|
|
Term
|
Definition
. UNIT 3 EXAM
In some process control applications, a steady-state error is required to cause equilibrium in the system.
A. True
B. False |
|
|
Term
|
Definition
. UNIT 3 EXAM
The integral mode is effective in systems which requite a fast response to the command signal.
A. True
B. False |
|
|
Term
|
Definition
. UNIT 3 EXAM
A position-type motion control system is in an instability condition when overshoot and oscillations occur.
A. True
B. False |
|
|
Term
|
Definition
. UNIT 3 EXAM
Steady-state error is also referred to as offset.
A. True
B. False |
|
|
Term
|
Definition
. UNIT 3 EXAM
Which of the following condition cause steady-state error?
A. the load is too large
B. a low gain setting of the proportional amplifier
C. the command signal setting
D. all of the above
E. |
|
|
Term
|
Definition
. UNIT 3 EXAM
The _____ control mode is used to overcome offset.
A. rate
B. Reset |
|
|
Term
|
Definition
. UNIT 3 EXAM
A(n) _____ operational amplifier is used to perform the reset control mode.
A. differentiator
B. Integrator
C. Difference |
|
|
Term
|
Definition
. UNIT 3 EXAM
A(n) _____ operational amplifier is used to perform the rate control mode.
A. differentiator
B. Integrator
C. difference |
|
|
Term
|
Definition
. UNIT 3 EXAM
The _____ control mode is used to overcome overshoot.
A. rate
B. Reset |
|
|
Term
| D. Both a and b are correct. |
|
Definition
. UNIT 3 EXAM
If the gain of the proportional amplifier in a position-type proportional-integral configuration is set high, which of the following statements describes its operation?
A. Movement will be fast.
B. Overshoot will occur.
C. The steady-state error signal is eliminated more slowly.
D. Both a and b are correct. |
|
|
Term
|
Definition
. UNIT 3 EXAM
If the error signal in a closed-loop system is changing very rapidly, the derivative output is _____.
A. zero
B. Small
C. large |
|
|
Term
|
Definition
. UNIT 3 EXAM
The _____ mode reduces overshoot and dampens oscillations of the controlled variable.
A. proportional
B. Integral
C. derivative
D.
E. |
|
|
Term
|
Definition
. UNIT 3 EXAM
The _____ mode eliminates steady-state error.
A. proportional
B. Integral
C. derivative |
|
|
Term
|
Definition
. UNIT 3 EXAM
A narrow differential gap in an on/off mode control system has which of the following characteristics?
A. small deviation from the set point
B. large deviation from the set point
C. less frequency of cycling
D. rapid cycling
E. both a and d |
|
|
Term
|
Definition
. UNIT 3 EXAM
The lagging effect of the controlled variable behind the output state produced by the actuator is called _____.
A. shadowing
B. dragging
C. hysteresis
D. Delaying |
|
|
Term
|
Definition
. UNIT 3 EXAM
A system that continues to oscillate is described as being _____.
A. stable
B. unstable
C. overdamped
D. critically damped |
|
|
Term
|
Definition
. UNIT 3 EXAM
In the on/off system, the output of the controller _____ as the measured value passes through the gap.
A. changes
B. does not change |
|
|
Term
| E. Both a and c are correct |
|
Definition
. UNIT 3 EXAM
Which of the following condition can cause a steady-state error to develop?
A. The system gain is too low.
B. The system gain is too high.
C. The load the actuator is driving is too large.
D. The system responds too fast.
E. Both a and c are correct. |
|
|
Term
|
Definition
. UNIT 3 EXAM
The _____ control modes is used to overcome offset.
A. rate
B. Reset |
|
|
Term
|
Definition
. UNIT 3 EXAM
The longer the time duration that an offset error exists, the larger the _____ gain become.
A. proportional
B. Integral
C. derivative |
|
|
Term
|
Definition
. UNIT 3 EXAM
The longer time duration an input signal is applied to an integrator op amp, the _____ its output signal becomes.
A. smaller
B. Larger |
|
|
Term
|
Definition
. UNIT 3 EXAM
If the magnitude of the input signal applied to a differentiator op amp is large and unchanged, its output signal is _____.
A. zero
B. small
C. large |
|
|
Term
| Gain = (1/40) * 100 = 2.5 |
|
Definition
| Calculate the gain of the process if the proportional band setting is at 40%. |
|
|
Term
| Gain = (1/40) * 100 = 2.5 |
|
Definition
| Calculate the gain of the process if the proportional band setting is at 40%. |
|
|
Term
|
Definition
| Calculate the proportional band setting if the gain of the process is 5. |
|
|
Term
|
Definition
. UNIT 4 EXAM
Pressure is measured as a force per unit of _____.
A. volume
B. Time
C. area
D. mass |
|
|
Term
|
Definition
. UNIT 4 EXAM
The term _____ is commonly used to describe the height of a liquid in a container above the measuring point.
A. specific gravity
B. Head
C. atmosphere
D. density |
|
|
Term
|
Definition
. UNIT 4 EXAM
As temperature increases, the density of a liquid _____.
A. increases
B. Reduces
C. does not change |
|
|
Term
|
Definition
. UNIT 4 EXAM
The hydrostatic pressure created by a liquid in an open container _____ when its temperature increases.
A. increases
B. Decreases
C. stays the same |
|
|
Term
| A. the inside wall of the container is less than the pressure exerted on the outside wall |
|
Definition
. UNIT 4 EXAM
If a liquid is removed from an enclosed container, the pressure on _____.
A. the inside wall of the container is less than the pressure exerted on the outside wall
B. the inside wall of the container is more than the pressure exerted on the outside wall
C. both sides of the container's walls will remain the same |
|
|
Term
|
Definition
. UNIT 4 EXAM
If a confined gas is compressed, its temperature will _____.
A. increase
B. Decrease
C. remain the same |
|
|
Term
| A. the atmospheric pressure at sea level |
|
Definition
. UNIT 4 EXAM
The reference pressure of a gauge pressure scale is _____.
A. the atmospheric pressure at sea level
B. a vacuum |
|
|
Term
|
Definition
. UNIT 4 EXAM
The psia pressure reading of an inflated tire is the pressure above ______.
A. atmospheric pressure
B. a vacuum |
|
|
Term
|
Definition
. UNIT 4 EXAM
A psia reading of zero indicates _____.
A. the atmospheric pressure at sea level
B. a vacuum |
|
|
Term
| A. gauge pressure measurement |
|
Definition
. UNIT 4 EXAM
The accuracy of a(n) _____ is altered by atmospheric pressure fluctuations.
A. gauge pressure measurement
B. absolute pressure measurement |
|
|
Term
| B. an inferred measurement |
|
Definition
. UNIT 4 EXAM
The method of measuring one variable to determine the value of another is referred to as _____.
A. the conversion method
B. an inferred measurement
C. a translation measurement |
|
|
Term
C. about 65 psia
50 + 14.7 = approx. 65 |
|
Definition
. UNIT 4 EXAM
If a pressure gauge displays a reading of 50 psig, what is the absolute pressure?
A. about 35 psia
B. about 50 psia
C. about 65 psia
D. about 100 psia |
|
|
Term
|
Definition
. UNIT 4 EXAM
Which of the following types of measurements can be made by diaphragm gauges?
A. absolute
B. gage
C. differential pressure
D. all of the above |
|
|
Term
|
Definition
. UNIT 4 EXAM
There are _____ resistive pressure elements in the bridge circuit of a semiconductor strain gauge.
A. 1
B. 2
C. 3
D. 4 |
|
|
Term
|
Definition
. UNIT 4 EXAM
The power source of static pressure is _____.
A. a pump
B. a compressor
C. a motor
D. Gravity |
|
|
Term
|
Definition
. UNIT 4 EXAM
The power source of a hydraulic system is _____.
A. a compressor
B. a pump
C. gravity
D. a boiler |
|
|
Term
|
Definition
. UNIT 4 EXAM
A transmitter _____.
A. converts a signal from the sensor into a standardized signal
B. is used to boost and send signals to a remote location
C. both a and b |
|
|
Term
| B. in its maximum condition |
|
Definition
. UNIT 4 EXAM
The span adjustment in the calibration procedure of an instrument is made when the process variable is _____.
A. in its minimum condition
B. in its maximum condition
C. anywhere within its full range |
|
|
Term
|
Definition
. UNIT 4 EXAM
Head is a measure of the _____ of a column of fluid.
A. diameter
B. cross-sectional area
C. volume
D. Height |
|
|
Term
|
Definition
. UNIT 4 EXAM
All pressure measurements are made against a reference pressure. The reference pressure for psig is _____.
A. a vacuum
B. atmospheric pressure
C. 0 inches of water column
D. 100 inches of water column |
|
|
Term
|
Definition
. UNIT 4 EXAM
A temperature rise _____ the density of a gas.
A. increases
B. Reduces
C. has no effect on |
|
|
Term
|
Definition
. UNIT 4 EXAM
The hydrostatic pressure created by a liquid in a closed container _____ when its temperature increases.
A. increases
B. Decreases
C. stays the same |
|
|
Term
|
Definition
. UNIT 4 EXAM
Which of the following types of measurements can be made with a manometer?
A. absolute pressure of a vacuum
B. absolute pressure above atmospheric pressure
C. differential pressure
D. all of above |
|
|
Term
| C. distance between the plates |
|
Definition
. UNIT 4 EXAM
Pressure varies the value of capacitance in a variable capacitor pressure sensor by changing the _____.
A. size of the capacitor plates
B. Dielectric
C. distane between the plates |
|
|
Term
|
Definition
. UNIT 4 EXAM
A device in which the shape of an elastic element is changed by a varying pressure is called a _____.
A. variable reluctance transducer
B. LVDT
C. strain gauge
D.
E. |
|
|
Term
|
Definition
. UNIT 5 EXAM
Thermodynamics refers to energy movement from _____.
A. hot to cold
B. cold to hot
C. both a and b |
|
|
Term
|
Definition
. UNIT 5 EXAM
Molecular movement stops when _____ is reached.
A. 0 degrees C
B. 0 degrees F
C. absolute zero
D. none of the above |
|
|
Term
|
Definition
. UNIT 5 EXAM
The process by which thermal energy is transferred by a solid is called _____.
A. convection
B. Conductance
C. radiation |
|
|
Term
|
Definition
. UNIT 5 EXAM
The process by which thermal energy is transferred by a gas is called _____.
A. convection
B. Conductance
C. radiation |
|
|
Term
|
Definition
. UNIT 5 EXAM
Condensation _____.
A. loses heat energy
B. gains heat energy
C. none of the above |
|
|
Term
|
Definition
. UNIT 5 EXAM
A calorie is work performed based on the _____ temperature scale.
A. Fahrenheit
B. Celsius |
|
|
Term
|
Definition
. UNIT 5 EXAM
A(n) _____ has a positive temperature coefficient.
A. thermistor
B. RTD
C. thermocouple |
|
|
Term
|
Definition
|
|
Term
| A. difference in temperature between the hot and cold junction. |
|
Definition
. UNIT 5 EXAM
A thermocouple produces a voltage that is proportional to the _____.
A. difference in temperature between the hot and cold junction
B. temperature of the hot junction
C. temperature of the cold junction |
|
|
Term
|
Definition
. UNIT 5 EXAM
In thermocouple circuits, cold junction compensation is used to eliminate error due to the effects of _____.
A. hysteresis
B. dead band
C. ambient temperature
D. open circuits |
|
|
Term
|
Definition
. UNIT 5 EXAM
The basic laws of physics state that every object with a temperature above absolute zero radiates energy in the for of _____.
A. photons
B. protons
C. Electrons
D. electromagnetic waves
E. auras |
|
|
Term
|
Definition
. UNIT 5 EXAM
An arrangement of several thermocouples wired in series for the purpose of increasing sensitivity is referred to as a(n) _____.
A. enhancer
B. thermopile
C. stack
D. piggy back |
|
|
Term
|
Definition
. UNIT 5 EXAM
A pyrometer in which the operator determines temperature by adjusting the intensity of a lamp to match the brightness of the target is called a(n) _____ pyrometer.
A. broadband
B. Ratio
C. optical |
|
|
Term
|
Definition
. UNIT 5 EXAM
The process by which thermal energy is transferred by a vacuum is called _____.
A. convection
B. Conductance
C. radiation |
|
|
Term
|
Definition
. UNIT 5 EXAM
When a bimetallic thermometer is exposed to heat, the strip will bend in the direction of the metal with the _____ expansion rate.
A. lower
B. Higher |
|
|
Term
|
Definition
. UNIT 5 EXAM
The thermistor _____ when the temperature to which it is exposed varies.
A. resistance changes
B. produces different voltages |
|
|
Term
|
Definition
. UNIT 5 EXAM
Thermistors react according to the principle of _____ temperature coefficient.
A. negative
B. Positive |
|
|
Term
|
Definition
. UNIT 5 EXAM
The relationship between resistance and temperature of a thermistor is relatively _____.
A. linear
B. Nonlinear |
|
|
Term
|
Definition
. UNIT 5 EXAM
When current is initially applied to a series circuit with a thermistor, its resistance is _____.
A. low
B. High |
|
|
Term
|
Definition
| . UNIT 5 EXAM The _____ junction of the thermocouple is considered the reference junction. A. cold B. Hot |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
. UNIT 5 EXAM
A _____ is capable of accurately measuring temperatures from a distance.
A. RTD
B. thermistor
C. thermocouple
D. Pyrometer |
|
|
Term
|
Definition
. UNIT 5 EXAM
In thermocouple circuits, cold junction compensation is used to eliminate errors due to the effects of _____.
A. hysteresis
B. dead band
C. ambient temperatures
D. open circuits |
|
|
Term
|
Definition
. UNIT 5 EXAM
A _____ can be determined by measuring the frequency at which it is radiated from an object.
A. temperature
B. visible color
C. both a and b |
|
|
Term
|
Definition
. UNIT 6 EXAM
Solids that float on liquids are referred to as _____.
A. foam
B. buoyants
C. slurry
D. Contaminants |
|
|
Term
|
Definition
. UNIT 6 EXAM
A flow rate that is too high can cause an undesirable _____.
A. pressure
B. heat
C. both a and b
D. none of the above |
|
|
Term
|
Definition
. UNIT 6 EXAM
Volumetric flow rate of a liquid is doubled by _____.
A. doubling the velocity of the fluid
B. doubling the area of the pipe
C. doubling the output of the pump in the system
D. any one of the above |
|
|
Term
|
Definition
. UNIT 6 EXAM
_____ are classified as fluids.
A. Liquids
B. Gasses
C. Vapors
D. All of the above |
|
|
Term
|
Definition
. UNIT 6 EXAM
Which of the following condition cause the density of a fluid to increase?
A. an increase in temperature
B. a decrease in temperature
C. an increase in pressure
D. a decrease in pressure
E. both b and c |
|
|
Term
|
Definition
. UNIT 6 EXAM
If the viscosity of a fluid increases, its ability to flow _____.
A. increases
B. Decreases |
|
|
Term
|
Definition
. UNIT 6 EXAM
If the viscosity of a gas increases, its ability to flow _____.
A. increases
B. Decreases |
|
|
Term
|
Definition
. UNIT 6 EXAM
If the velocity of the fluid pumped through a piping system is reduced, the Reynolds number _____.
A. increases
B. Decreases |
|
|
Term
|
Definition
. UNIT 6 EXAM
Which of the following terms identify the unit of measurement for flow?
A. velocity
B. differential pressure
C. volumetric flow rate |
|
|
Term
| C. The temperature to which the fluid is exposed decreases. |
|
Definition
. UNIT 6 EXAM
Which factors can cause turbulent flow?
A. The diameter of a pipe is increased.
B. The flow rate is reduced.
C. The temperature to which the fluid is exposed decreases. |
|
|
Term
|
Definition
. UNIT 6 EXAM
The Reynolds number is reduced if _____.
A. the diameter of the pipe is smaller
B. the viscosity of the fluid is larger
C. the velocity of the fluid reduces
D. a fluid with a lower density is used
E. all of the above |
|
|
Term
|
Definition
. UNIT 6 EXAM
The larger the diameter of a pipe, the more _____ the fluid to pass through.
A. difficult it is for
B. easy it is for
C. it depends on whether the fluid is a liquid or a gas. |
|
|
Term
|
Definition
. UNIT 6 EXAM
In a differential pressure flow meter, the velocity of a fluid leaving the orifices plate is _____ the fluid that approaches it.
A. less than
B. greater than
C. the same as |
|
|
Term
|
Definition
. UNIT 6 EXAM
The _____ type of flow meter is the most common type of meter to measure the volume of fluid that flows.
A. differential pressure
B. positive displacement
C. velocity |
|
|
Term
|
Definition
. UNIT 6 EXAM
A Coriolis flow meter is a _____ type of flow meter.
A. volumetric
B. weight
C. mass
D. Velocity |
|
|
Term
|
Definition
. UNIT 6 EXAM
As the velocity of the fluid increases, the resistance of the unshielded thermistor sensor head in a thermal flow meter _____.
A. decreases
B. Increases
C. stays the same |
|
|
Term
| C. the number of vortexes that form within a given time period |
|
Definition
. UNIT 6 EXAM
In a vortex flow meter, the sensor placed downstream measures _____.
A. constant pressure that is proportional to flow rate
B. the magnitude of pressure developed by the vortexes that form
C. the number of vortexes that form within a given time period |
|
|
Term
|
Definition
. UNIT 6 EXAM
The formula Q=VA indicates that volumetric flow can be determined if two variables are known. These variables are A-the cross-sectional area of the pipeline, and V-the fluid _____.
A. volume
B. venturi effect
C. velocity
D. vena contracta |
|
|
Term
|
Definition
. UNIT 6 EXAM
According to Bernoulli's principle, as velocity of a fluid increases, pressure _____.
A. increases
B. Decreases |
|
|
Term
| A. pressure detector on the inlet side of the orifice |
|
Definition
. UNIT 6 EXAM
The primary element of a flow meter is the _____.
A. pressure detector on the inlet side of the orifice
B. pressure detector on the outlet side of the orifice
C. Restriction |
|
|
Term
|
Definition
. UNIT 6 EXAM
Which of the following restrictions are best used for measuring fluid that contain solid particles?
A. orifice
B. flow nozzle
C. Venturi |
|
|
Term
|
Definition
. UNIT 6 EXAM
The faster the fluid flows through the tube of a Coriolis meter, the _____ it will twist.
A. less
B. More |
|
|
Term
|
Definition
. UNIT 6 EXAM
Flow meters based ont he Doppler effect measure _____.
A. sound
B. Magnetism
C. capacitance |
|
|
Term
|
Definition
. UNIT 6 EXAM
A flow meter that uses a rotor and a magnetic pick-up coil to count rotor revolutions is known as a _____ meter.
A. Doppler
B. Faraday
C. turbine
D. Vortex |
|
|
Term
|
Definition
. UNIT 6 EXAM
Primary advantages of direct-reading, mass flow meters such as the Coriolis meter include _____.
A. non-invasive design
B. immunity to changes in product density and other fluid properties
C. immunity to changes in fluid pressure and temperature
D. excellent accuracy
E. all of the above |
|
|
Term
|
Definition
. UNIT 7 EXAM
The control technique used in a system that makes point level measurements is the _____ method.
A. on/off
B. Proportional |
|
|
Term
|
Definition
. UNIT 7 EXAM
Direct measurement devices are also referred to as being _____.
A. invasive
B. Noninvasive |
|
|
Term
|
Definition
. UNIT 7 EXAM
The _____ measurement method provides inferred information.
A. direct
B. indirect |
|
|
Term
|
Definition
. UNIT 7 EXAM
A(n) _____ level measurement device is typically used when the material which is being detected is corrosive.
A. invasive
B. non-invasive |
|
|
Term
|
Definition
. UNIT 7 EXAM
The point at which the liquid in a tank and the air above it are in contact is referred to as the _____.
A. boundary
B. Interface
C. border |
|
|
Term
|
Definition
. UNIT 7 EXAM
A _____ -type level device is used to measure a liquid-liquid interface tank.
A. float
B. Displacement
C. purge |
|
|
Term
|
Definition
. UNIT 7 EXAM
Hydrostatic head pressure is at the _____ of a full tank.
A. bottom
B. Middle
C. top |
|
|
Term
|
Definition
. UNIT 7 EXAM
In a purge level measurement system, the amount of pressure required to force air through the tube is _____ proportional to the amount of liquid in the tank.
A. directly
B. Inversely |
|
|
Term
|
Definition
. UNIT 7 EXAM
A paddle wheel detector is a _____ -type of level measurement instrument.
A. point
B. Continuous |
|
|
Term
|
Definition
. UNIT 7 EXAM
The differential pressure method takes measurements in a(n) _____ container.
A. open
B. Pressurized |
|
|
Term
|
Definition
. UNIT 7 EXAM
A conductive probe makes _____ measurements.
A. point
B. Continuous
C. both a and b |
|
|
Term
|
Definition
. UNIT 7 EXAM
A capacitive probe makes _____ measurements.
A. point
B. Continuous
C. both a and b |
|
|
Term
|
Definition
. UNIT 7 EXAM
With a capacitive probe, the level of a solution in a tank determines the capacitance by effecting the _____.
A. size of the capacitor plates
B. Dielectric |
|
|
Term
|
Definition
. UNIT 7 EXAM
With an ultrasonic sensor, _____ is developed at its output when it measures the minimum level.
A. 0 mA
B. 4 mA
C. 10 mA
D. 20 mA |
|
|
Term
|
Definition
. UNIT 7 EXAM
Which of the following quantitative values are used to indicate level?
A. height
B. percentage
C. Volume
D. weight
E. all of the above |
|
|
Term
|
Definition
. UNIT 7 EXAM
The slower bubbles are emitted from the tube of a purge level detector, the _____ liquid is in the container.
A. less
B. More |
|
|
Term
|
Definition
. UNIT 7 EXAM
Conductive level probes make _____ -type measurements of liquids in a container.
A. multipoint
B. Continuous |
|
|
Term
|
Definition
. UNIT 7 EXAM
The term interface refers to the location where two mediums, such as _____, make contact with one another.
A. liquids and solids
B. liquids and gas
C. liquids and liquids
D. solids and gases
E. all of the above |
|
|
Term
|
Definition
. UNIT 7 EXAM
The amount of capacitance sensed in a capacitance level detector is determined by the _____.
A. area of the plates
B. dielectric value
C. distance between the plates |
|
|
Term
|
Definition
. UNIT 7 EXAM
Level measurement devices that use displacers are based on _____.
A. Faraday's law
B. Bernoulli's equation
C. Archimedes principle
D. Charles's law |
|
|
Term
|
Definition
. UNIT 7 EXAM
Level measurement devices that use displacers are based on _____.
A. Faraday's law
B. Bernoulli's equation
C. Archimedes principle
D. Charles's law |
|
|
Term
| C. heavier than or equal to the volume |
|
Definition
. UNIT 7 EXAM
Displacers used in level measurement systems are _____ of the measured fluid.
A. lighter than an equal volume
B. the same weight as an equal volume
C. heavier than or equal to the volume
D. half the weight |
|
|
Term
| B. invasive, multipoint, controlling |
|
Definition
. UNIT 7 EXAM
A conductive probe measurement system uses electrodes suspended in a vessel. It is designed to start a pump at a low level limit and turn the pump off at a high level limit. What is the best description of the system?
A. invasive, single-point, indication
B. invasive, multipoint, controlling
C. noninvasive, multipoint, controlling
D. noninvasive, single-point, controlling |
|
|
Term
|
Definition
. UNIT 7 EXAM
Which of the following level measurement techniques are an example of checking the level of oil in your car with a dipstick?
A. inferential
B. point measurement
C. Direct
D. invasive
E. both c and d |
|
|
Term
| C. hydrostatic head pressure |
|
Definition
. UNIT 7 EXAM
When a pressure transducer is connected to the bottom of a vessel for the purpose of measuring level, what is the actual variable being measured?
A. level, directly
B. differential pressure
C. hydrostatic head pressure
D. Volume |
|
|
Term
| B. the vapor space above the stored fluid |
|
Definition
. UNIT 7 EXAM
When a differential pressure technique is used to measure level in a pressurized vessel, the low pressure sensor of the DP device is generally connected to _____.
A. the bottom of the vessel
B. the vapor space above the stored fluid
C. atmosphere
D. a vacuum pump |
|
|
Term
|
Definition
.
UNIT 8 EXAM
A process stream refers to the flow of a _____.
A. gas
B. Liquid
C. both a and b |
|
|
Term
|
Definition
.
UNIT 8 EXAM
A solution that has more positive ions than negative ions is _____.
A. acidic
B. Alkaline |
|
|
Term
|
Definition
.
UNIT 8 EXAM
If the pH value of a solution is greater then 7, it is a(n) _____.
A. base
B. Acid |
|
|
Term
|
Definition
.
UNIT 8 EXAM
A treated pH solution is referred to as a(n) _____.
A. reagent
B. Effluent
C. influent |
|
|
Term
|
Definition
.
UNIT 8 EXAM
A solution that is too acidic is typically neutralized by _____.
A. being diluted with water
B. adding a base |
|
|
Term
|
Definition
.
UNIT 8 EXAM
_____ pH control is typically used when the volume of the solution to be treated is relatively small.
A. Batch
B. Continuous |
|
|
Term
|
Definition
.
UNIT 8 EXAM
The byproduct of a hydrocarbon fuel after it is completely burned are which of the following fluids?
A. water
B. oxygen
C. carbon dioxide
D. carbon monoxide
E. both a and c |
|
|
Term
|
Definition
.
UNIT 8 EXAM
Which of the following factors determines the degree to which conductivity of a liquid is measured?
A. concentration of an ingredient dissolved in water
B. the temperature of the liquid
C. the type of electrolyte
D. all of the above
E. the volume of the solution in a conatiner |
|
|
Term
|
Definition
.
UNIT 8 EXAM
Static electricity decreases if the humidity level in the air _____.
A. increases
B. decreases |
|
|
Term
|
Definition
.
UNIT 8 EXAM
An aluminum oxide sensor measures _____.
A. absolute humidity
B. relative humidity
C. dew point |
|
|
Term
|
Definition
.
UNIT 8 EXAM
The term _____ refers to the property of a material that absorbs or loses water.
A. mass density
B. Airatrons
C. hygroscopic |
|
|
Term
|
Definition
.
UNIT 8 EXAM
Evaporation has _____ effect on the surface of the material from which it leaves.
A. a heating
B. a cooling
c. no |
|
|
Term
|
Definition
.
UNIT 8 EXAM
_____ is the mass of water vapor present in a particular volume of atmosphere.
A. Absolute humidity
B. Relative humidity
C. Dew point |
|
|
Term
| C. how much the dielectric constant changes due to the amount of water the dieletric material absorbs. |
|
Definition
.
UNIT 8 EXAM
With an electronic capacitance detector, humidity is determined by its capacitance value which is cause by _____.
A. the amount of moisture that forms on the plates
B. how much the plates move apart due to the moisture that causes the dielectric to swell
C. how much the dielectric constant changes due to the amount of water the dielectric material absorbs |
|
|
Term
|
Definition
.
UNIT 8 EXAM
The term pH refers to the unikt of measure which describes the degree at which a solution is _____.
A. acidic
B. Alkaline
C. both a and b |
|
|
Term
|
Definition
.
UNIT 8 EXAM
The term _____ refers to compounds that break up into charged particles when they combine with water.
A. static action
B. Dissociate
C. dynamic reaction |
|
|
Term
|
Definition
.
UNIT 8 EXAM
An acid solution _____ in strength as it pH value becomes closer to 0.
A. increases
B. Decreases |
|
|
Term
|
Definition
.
UNIT 8 EXAM
A(n) _____ must be added to a solution that is too acidic.
A. reagent
B. effluent
C. influent |
|
|
Term
|
Definition
.
UNIT 8 EXAM
pH measurements are based on _____ in a solution.
A. all ions
B. Hydrogen
C. hydroxl |
|
|
Term
|
Definition
.
UNIT 8 EXAM
Water purity is primarily determine by measuring _____.
A. pH
B. Conductivity |
|
|
Term
|
Definition
.
UNIT 8 EXAM
Complete comustion does not occur if the proper amount of _____ is present.
A. fuel
B. Air
C. fuel and air |
|
|
Term
|
Definition
.
UNIT 8 EXAM
Electrode probes which measure conductivity make measurements at different ranges by changing the _____.
A. resistance value inside the meter
B. applied voltage
C. electrode dimensions |
|
|
Term
| B. psychrometric detector |
|
Definition
.
UNIT 8 EXAM
The _____ uses a dry bulb and a wet bulb.
A. aluminum oxide sensor
B. psychrometric detector |
|
|
Term
|
Definition
.
UNIT 8 EXAM
As the atmosphere's pressure increases, the water vapor saturation point _____.
A. increases
B. Decreases |
|
|
Term
|
Definition
.
UNIT 8 EXAM
The dew point is determined by measuring the temperature of the _____ when condensation starts to form on the outside of the cup.
A. ambient air
B. liquid inside the cup |
|
|
Term
| C. temperature and pressure |
|
Definition
.
UNIT 9 EXAM
In batch production applications, _____ are the two most common process variables that must be regulated to control the rate of reaction.
A. level and flow
B. level and pressure
C. temperature and pressure
D. level and temperature |
|
|
Term
|
Definition
.
UNIT 9 EXAM
A term used to describe _____ is repeatability.
A. accuracy
B. precision |
|
|
Term
|
Definition
.
UNIT 9 EXAM
A term used to describe _____ is repeatability.
A. accuracy
B. precision |
|
|
Term
|
Definition
.
UNIT 9 EXAM
A term used to describe _____ is repeatability.
A. accuracy
B. precision |
|
|
Term
|
Definition
.
UNIT 9 EXAM
A term used to describe _____ is repeatability.
A. accuracy
B. precision |
|
|
Term
|
Definition
.
UNIT 9 EXAM
A term used to describe _____ is repeatability.
A. accuracy
B. precision |
|
|
Term
|
Definition
.
UNIT 9 EXAM
A term used to describe _____ is repeatability.
A. accuracy
B. precision |
|
|
Term
|
Definition
.
UNIT 9 EXAM
The _____ characteristic of a sensor refers to the time at which its output reaches a steady state after detecting a change of the variable it measures.
A. static
B. Dynamic |
|
|
Term
|
Definition
.
UNIT 9 EXAM
A _____ converts the output of a sensor into a standardized signal.
A. transmitter
B. Transducer
C. either a or b |
|
|
Term
|
Definition
.
UNIT 9 EXAM
A _____ transducer is used to measure the level in an open conatiner that stores liquid when using a purge (bubbler) type of measuring device.
A. I/P
B. P/I
C. I/V
D. V/I |
|
|
Term
|
Definition
.
UNIT 9 EXAM
A square root extractor is the transducer used when measuring _____ as the primary procdess variable being controlled.
A. pressure
B. temperature
C. flow
D. level |
|
|
Term
|
Definition
.
UNIT 9 EXAM
The input to the controller is received from _____.
A. a sensor
B. a transmitter
C. a transducer
D. any of the above |
|
|
Term
|
Definition
.
UNIT 9 EXAM
Which element of a closed-loop system is performed by a servo valve?
A. sensor
B. Actuator
C. controller |
|
|
Term
|
Definition
.
UNIT 9 EXAM
When _____ mA are applied to the servo valve, it should be completely closed.
A. 4
B. 20 |
|
|
Term
|
Definition
.
UNIT 9 EXAM
In process control, the process variable for flow rate is expressed as _____.
A. gain
B. percentage
C. ounces per second
D. gallons per minute
E. cubic centimeters per minute |
|
|
Term
|
Definition
.
UNIT 9 EXAM
The opposite to the mixing/blending processing method is _____.
A. chemical reaction
B. Separation
C. polymerization |
|
|
Term
|
Definition
.
UNIT 9 EXAM
Which process should primarily be monitored to prevent the heating element from becoming too hot and becoming damaged?
A. temperature
B. pressure
C. level
D. product composition |
|
|
Term
|
Definition
.
UNIT 9 EXAM
Valve positioners are NOT used to _____.
A. overcome insufficient forces within the valve
B. shorten the response time in a closed-loop system
C. reduce the hysteresis effect of the diaphragm
D. provide linear positioning
E. none of the above |
|
|
Term
|
Definition
.
UNIT 9 EXAM
Which of the following funtions are performed by an alarm?
A. indicates when the controlled variable differs from the set point by a certain value
B. indicates when a controlled variable is increasing or decreasing at a faster rate than desired
C. indicates if the controlled variable reaches or exceeds a prescribed limit value
D. all of the above |
|
|
Term
|
Definition
.
UNIT 9 EXAM
The _____ is sent to the final control element.
A. measured variable
B. feedback signal
C. error signal
D. control signal |
|
|
Term
|
Definition
.
UNIT 9 EXAM
Which of the following influences cause a controlled variable to change?
A. a disturbance appears
B. a load demand varies
C. the set point is adjusted
D. all of the above |
|
|
Term
|
Definition
.
UNIT 9 EXAM
Which of the following factors contribute to the dynamic response of a single control loop?
A. the instrument in a control loop
B. the inertia of the controlled variable
C. dead time
D. all of the above |
|
|
Term
|
Definition
.
UNIT 9 EXAM
The amount of pure lag of a controlled variable is determined by the _____ of the material from which the variable is made.
A. capacity
B. Type
C. both a and b |
|
|
Term
|
Definition
.
UNIT 9 EXAM
The _____ refers to the response time of the instruments in a control loop.
A. time lag
B. dynamic response
C. dead time
D. pure lag |
|
|
Term
|
Definition
.
UNIT 9 EXAM
_____ is the elapsed time between the instant a deviation of the controlled variable occurs, and the corrective action begins.
A. Time lag
B. Dynamic response
C. Dead time
D. Pure lag |
|
|
Term
|
Definition
.
UNIT 9 EXAM
An on/off control system _____.
A. is relatively inexpensive
B. is easy to design
C. lacks precision
D. all of the above |
|
|
Term
|
Definition
.
UNIT 9 EXAM
A _____ causes a controller to produce on and off signals at different values around the set point.
A. dynamic response
B. first order time lag
C. deadband
D. Dead time |
|
|
Term
|
Definition
.
UNIT 9 EXAM
Which of the following statements describe the capability of an open-loop system?
A. It causes the process to change when the set point is varied.
B. It cannot make adjustments if a disturbance is encountered.
C. It provides automatic control for some types of systems.
D. All of the above |
|
|
Term
|
Definition
.
UNIT 9 EXAM
The size of the deadband is _____ proportional to the rate at which a final control element turns on and off.
A. directly
B. Inversely
C. none of the above |
|
|
Term
|
Definition
.
UNIT 9 EXAM
The controlled variable in an on/off system with a deadband will deviate from the set point by _____ amount than a system without a deadband.
A. a smaller
B. a larger
C. the same |
|
|
Term
|
Definition
.
UNIT 10 EXAM
A _____ identification number is assigned to all of the instruments included in a loop regardless of their function or location.
A. tag
B. loop
C. part
D. Symbol |
|
|
Term
| C. the type of process variable |
|
Definition
.
UNIT 10 EXAM
The first letter of a functional identifier indicates _____.
A. the function of the instrument
B. how the insturment is mounted
C. the type of process variable
D. the loop identification |
|
|
Term
|
Definition
.
UNIT 10 EXAM
On a P&ID, a thick solid line indicates _____.
A. process piping
B. an instrument connected to a process |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
.
UNIT 10 EXAM
When there are three or four letter tag identifier, the second letter _____.
A. tells the function of the instrument
B. provides additional information about the first letter
C. indicates the type of process variable
D. gives the loop identification
E. either a or b |
|
|
Term
|
Definition
.
UNIT 10 EXAM
Which of the following information is NOT provided by P&ID symbols and tag numbers?
A. identifies the function of the instrument
B. shows how the instrument is mounted
C. identifies the loop number where it performs its operation
D. identifies the measured variable controlled by the loop
E. none of the above |
|
|
Term
|
Definition
|
|
Term
| B. an instrument connected to a process |
|
Definition
.
UNIT 10 EXAM
On a P&ID, a thin solid line indicates _____.
A. process piping
B. an instrument connected to a process |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
.
UNIT 10 EXAM
A balloon contains letters, lines and numbers that identify _____.
A. location
B. function in a process
C. mounting
D. all of the above |
|
|
Term
| B. function the instrument performs |
|
Definition
.
UNIT 10 EXAM
The second letter of a tag number provides information about the _____.
A. type of process variable
B. function the instrument performs |
|
|
Term
|
Definition
.
UNIT 10 EXAM
An information block provides _____.
A. an identification number
B. revision dates
C. parts list
D. all of the above |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
.
UNIT 11 EXAM
The _____ determines the amplitude of a proportional mode output signal.
A. error signal size
B. gain
C. proportional band
D. all of the above |
|
|
Term
|
Definition
.
UNIT 11 EXAM
The proportional gain will be 4 if the output changes by 80 percent when the input changes by _____ percent.
A. 10
B. 20
C. 80
D. 320 |
|
|
Term
|
Definition
.
UNIT 11 EXAM
Proportional _____ is defined as the percentage change in the controlled variable that causes the final control element to go through 100% of its range.
A. gain
B. Band |
|
|
Term
|
Definition
.
UNIT 11 EXAM
When the gain of a proportional controller is 1, it will cause the controlled variable to change more _____ than if the gain is 4.
A. slowly
B. Quickly |
|
|
Term
|
Definition
.
UNIT 11 EXAM
A controller with a proportional band of 100 will move the final control element _____ as much as one with a proportional band of 50.
A. the same amount
B. Half
C. twice |
|
|
Term
|
Definition
.
UNIT 11 EXAM
If the controlled variable is below the proportional band, the proportional action will cause the final control element to be _____.
A. fully off
B. partially on
C. fully on |
|
|
Term
|
Definition
.
UNIT 11 EXAM
_____ is the difference between the set point and the value of the measured variable.
A. Offset
B. Steady-state error
C. Either a or b |
|
|
Term
|
Definition
.
UNIT 11 EXAM
What kind of controller action is related to the length of time an error persists?
A. on/off
B. proportional
C. integral
D. derivative
E. all of the above |
|
|
Term
|
Definition
.
UNIT 11 EXAM
The magnitude of the _____ output is proportional to the time duration that a deviation between set point and the controlled variable exists.
A. on/off
B. proportional
C. integral
D. derivative
E. all of the above |
|
|
Term
|
Definition
.
UNIT 11 EXAM
The _____ adjustment on the controller is used to change the derivative action.
A. gain
B. PB
C. reset
D. rate |
|
|
Term
|
Definition
.
UNIT 11 EXAM
Another term for integral is _____.
A. reset
B. rate
C. PB |
|
|
Term
|
Definition
.
UNIT 11 EXAM
Which control mode is most influential in reducing overshoot in a system which requires a fast response?
A. on/off
B. proportional
C. integral
D. derivative |
|
|
Term
|
Definition
.
UNIT 11 EXAM
As the length of time a steady-state error continues, the magnitude of the integral output _____.
A. increases
B. decreases
C. does not change |
|
|
Term
|
Definition
.
UNIT 11 EXAM
Which of the following characteristics describe how the derivative controller effects the response of a controller?
A. fast initial response
B. eliminates offset
C. less overshoot
D. both a and c |
|
|
Term
|
Definition
.
UNIT 11 EXAM
In a feedforward control system, the variable that is monitored by the controller _____ the process.
A. enters
B. Exits
C. either a or b |
|
|
Term
|
Definition
.
UNIT 11 EXAM
Which instrument compensates for non-linear measurements?
A. square root extractor
B. adaptive controller
C. ratio controller
D. all of the above
E. both a and b |
|
|
Term
|
Definition
.
UNIT 11 EXAM
Which control method is commonly associated with controlling the flowrate of materials to ensure the correct proportion of a mixture.
A. feedback
B. feedforward
C. ratio
D. proportional
E. derivative |
|
|
Term
|
Definition
.
UNIT 11 EXAM
Which of the following condition cause an unmeasurable disturbance?
A. a worn stem valve
B. a sensor out of tolerance
C. a controller programmed incorrectly
D. all of the above |
|
|
Term
|
Definition
.
UNIT 11 EXAM
The main difference between feedback control and feedforward control is _____.
A. one affects the manipulated variable, while the other affects the measured disturbance
B. one occurs after the controlled variable changes while the other tries to prevent the controlled variable from changing
C. the speed at which corrections to a disturbance is made
D. one is controlled by an inner loop and the other is controlled by an outer loop
E. both a and c |
|
|
Term
|
Definition
.
UNIT 11 EXAM
A specialized transducer which converts the non-linear output of a sensor into a linear signal used by the _____ is a square root extractor.
A. transmitter
B. final control element
C. controller |
|
|
Term
|
Definition
.
UNIT 11 EXAM
_____ control generally incorporates an inner loop within an outer loop to achieve more precise control of the controlled variable in the process.
A. Feedforward
B. Cascade
C. Ratio
D. All of the above |
|
|
Term
|
Definition
.
UNIT 11 EXAM
In a ratio control system, how many variables are uncontrolled?
A. none
B. One
C. all but one |
|
|
Term
|
Definition
.
UNIT 11 EXAM
The controller in the _____ loop of a cascade system receives its set point signal from an external source.
A. primary
B. secondary |
|
|
Term
|
Definition
.
UNIT 11 EXAM
Which type of control is used to blend two products?
A. cascade
B. feedback
C. feedforward
D. ratio |
|
|
Term
|
Definition
.
UNIT 11 EXAM
The secondary controller of a cascade system receives a feedback signal that represents the condition of the _____ variable.
A. controlled
B. manipulated |
|
|
Term
|
Definition
.
UNIT 12 EXAM
After the preliminary steps are performed, the first step of the Ziegler-Nichols tuning method is to obtain process identification information.
A. True
B. False |
|
|
Term
|
Definition
.
UNIT 12 EXAM
The ultimate period is the term that describes the controller setting which causes the process to cycle continuously.
A. True
B. False |
|
|
Term
|
Definition
.
UNIT 12 EXAM
Using the Ziegler-Nichols tuning method, the proportional setting for the proportional-only mode will be different than the proportional setting for the proportional-plus-integral control mode.
A. True
B. False |
|
|
Term
|
Definition
.
UNIT 12 EXAM
The Ziegler-Nichols Reaction Curve tuning method is used in applications where oscilatting conditions must be avoided.
A. True
B. False |
|
|
Term
|
Definition
.
UNIT 12 EXAM
Due to the limited technical credentials of process equipment operators, they should never be consulted before the tuning procedure begins.
A. True
B. False |
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Definition
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UNIT 12 EXAM
One way of verifying that energy sources are adequately supplied to the final control element is to observe the condition of the controlled variable.
A. True
B. False |
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Definition
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UNIT 12 EXAM
The information provided on the graph by a process identification procedure is used in formulas to calculate the proper controller settings.
A. True
B. False |
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Definition
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UNIT 12 EXAM
When making a 5% to 10% set point change during the tuning procedure, the product is usually adversely affected.
A. True
B. False |
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Definition
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UNIT 12 EXAM
A three-point calibration check effectively shows linearity.
A. True
B. False |
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Definition
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UNIT 12 EXAM
Zero and span adjustments may affect each other.
A. True
B. False |
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Definition
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UNIT 12 EXAM
The _____ is used in mathematical formulas to calculate controller settings for the Ziegler-Nichols Continuous Cycling tuning Method.
A. ultimate period
B. ultimate proportional value
C. both a and b |
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Definition
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UNIT 12 EXAM
After the controller is tuned, if the process reaction curve produced does not display a proper 1/4 decay ratio because it oscillates too much, the proportionl band is set too _____.
A. low
B. High |
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Definition
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UNIT 12 EXAM
Which of the following values are obtained when the process identification waveform of the Ziegler-Nichols Continuous Cycling tuning method is a sustained sine wave?
A. ultimate period
B. ultimiate gain
C. ultimate proportional band
D. all of the above |
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Definition
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UNIT 12 EXAM
The time interval between two successive peaks of a sustained sine wave on a Ziegler-Nichols graph is the _____.
A. ultimate gain
B. ultimate proportional band
C. ultimate period
D. all of the above |
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Definition
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UNIT 12 EXAM
If the derivative control mode is added, the proper setting for proportional gain must _____.
A. be increased
B. be decreased
C. remain the same |
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Definition
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UNIT 12 EXAM
A properly tunded controller should produce a reaction curve with a decay ratio of _____.
A. 1/8
B. 1/4
C. 1/2
D. Depending on the process, it can be any of the above |
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Definition
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UNIT 12 EXAM
After the controller is tuned, the settings are verified by observing the decay ratio waveform on a chart recorder when the controller is in the _____ mode.
A. manual
B. Automatic |
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Definition
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UNIT 12 EXAM
The process identification information for the Ziegler-Nichols Reaction Curve Method is observed on a chart recorder when the controller is in the _____ mode.
A. manual
B. Automatic |
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Definition
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UNIT 12 EXAM
The proper operation of a closed-loop feedback system is dependant on _____.
A. proper design
B. instrument calibration
C. controller tuning
D. all of the above |
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Definition
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UNIT 12 EXAM
Calibration procedures are performed _____.
A. before new instrument installation
B. after extended shutdown
C. after repair
D. if the product being manufactured does not meet specifications
E. any of the above |
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Term
| A. should be 10 times more accurate than the transmitter being tested |
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Definition
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UNIT 12 EXAM
A secondary standard device _____.
A. should be 10 times more accurate than the transmitter being tested
B. only needs to be half as accurate as the transmitter being tested |
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Definition
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UNIT 12 EXAM
A reset time of 20 repeats per minute equals an integral time of __________ minutes per repeat. |
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Definition
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UNIT 12 EXAM
An integral time of 0.5 minutes per repeat equals __________ repeats per minute. |
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Definition
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UNIT 12 EXAM
The calibration of instruments should be performed __________ (before, after) the tuning procedure of a controller is performed. |
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1. Study the loop diagram
2. Obtain clearance
3. Verify each component is operative |
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Definition
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UNIT 12 EXAM
List the preliminary steps that should be performed before tuning a controller. |
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