8.33 meters is the full wavelength in the air for what RF frequency?

A. 72 MHz
B. 83.3 MHz
C. 36 MHz
D. 16.66

C. 36 MHz

f = C/λ

f=299,792,458 m/s/wavelength meters

f=299,792,458/8.33

Decimal 164 would appear as ______ in Binary?

a. 10010101
b. 10100100
c. 10001111
d. 01110100

b. 10100100

A resistor has color stripes yellow, violet, violet, silver. It is:

A. 46 MegOhm +/- 10%
B. 470 MegOhm +/- 10%
C. 37 MegOhm +/- 10%
D. 48 kOhm +/- 5%

B. 470 MegOhm +/- 10%

What is the total capacitance of three capacitor values at 100pf, 100pf and 50 pf when connected in series?

a. 25 uf
b. 250 uf
c. 25 pf
d. 250 pf

c. 25 pf

What is the ripple frequency of a full-wave single phase bridge rectifier operated at 60 Hz?

a. 180 Hz
b. 90 Hz
c. 360 Hz
d. 120 Hz

d. 120 Hz

When heated or cooled, a __________ emits a voltage.

A. Thermocouple
B. Therometer
C. Thermostat
D. Thermocline

A. Thermocouple

Which wire size is physically largest?

A. #8
B. #12
C. #16
D. #24

A. #8

Adding the binary numbers 101011 and 001110 will give you what result?

A. 111001
B. 111111
C. 001010
D. 111011

A. 111001

A component that reduces resistance when heated:

a. is negative temperature coefficient thermistor
b. is positive temperature coefficient thermistor
c. is a varactor
d. is a thermocouple

a. is negative temperature coefficient thermistor

An autotransformer:

a. has the secondary unattached to primary
b. has a single winding
c. is used in vehicles only
d. uses a boost coil

b. has a single winding

A dual trace oscilloscope differs from a single trace in that only the dual trace scope:

A. Has two cathode ray guns
B. Has Z input
C. Alternates sweeps
D. Has intensified traces

C. Alternates sweeps

If an RF signal voltage is reduced by 6 dB, it is then:

A. 25% less
B. Half the original size
C. 75% less
D. Not the changed in voltage level

B. Half the original size

Applying positive voltage to the P end of an ordinary germanium diode:

A. Will forward bias it
B. Will reverse bias it
C. Probably will damage it
D. Should have no effect on it

A. Will forward bias it

You would probably prefer a digital VOM over an ordinary analog meter:

a. for most accuracy
b. to insure operation safely
c. for convenience
d. when signals are intermittent

a. for most accuracy

You should expect the video amplifier in a radar or TV receiver to have a frequency response of:

a. 20 Hz - 20 kHz
b. 20 kHz - 180 kHz
c. 0 - 6 Mhz
d. 88 Mhz - 108 Mhz

c. 0 - 6 Mhz

The radio communication mode that utilizes the basic frequency and one of the side bands:

a. is called "SSB"
b. is FM
c. must be line-of-sight
d. uses CB technology

a. is called "SSB"

When using fiber optics to transfer a signal, the light must:

a. be visible
b. be LED generated
c. be between 3 GHz and 30 GHz
d. enter the "cone of acceptance"

d. enter the "cone of acceptance"

The energy stored in a coil is measured in:

a. Henrys
b. Joules
c. Farads
d. Volts

b. Joules

The telephone communication term "cellular" refers to:

a. undefined telephone radio channels
b. a provider trade name
c. Caller Environment Lone Line service
d. small geographic areas covered by each base station

d. small geographic areas covered by each base station

Integrated Circuit failures often exhibit:

a. open or short conditions
b. solder leakage
c. audible noise
d. radiation hazards

a. open or short conditions

Which of these would you normally choose to cause an LED to light?

a. 3 mV AC
b. 3 mV DC
c. 30 mV DC
d. 3 V DC

d. 3 V DC

A capacitor (3/8" x 1/8" ceramic or mica) marked 47k is:

a. 47pf +/- 10%
b. 4.7uf +/- 5%
c. 47uf +/-20%
d. 47mf +/-10%

a. 47pf +/- 10%

A "Digital Storage Oscilloscope":

a. uses micro processing and memory to allow close analysis of signals
b. is specially designed for analyzing digital signals
c. converts analog input signals to a digital display
d. alternatives between digital and analog display traces
e. a and b
f. a, b and c

f. a, b and c

An antenna that is longer than another:

a. will have higher resonance frequency
b. will have a lower resonant frequency
c. has a higher Q
d. delivers higher power

b. will have a lower resonant frequency

An 8 bit binary code allows ______ logical combinations:

a. 26
b. 64
c. 256
d. 512

c. 256

An inductor in an electrical circuit:

A. Causes current to lead voltage
B. Opposes the flow of AC current
C. Appears capacitive to AC current
D. Appears as a short circuit to AC current

B. Opposes the flow of AC current

A printer directly connected to a personal computer would use a __ connection.

a. VGA
b. Ethernet 100 Base-T
c. USB or parallel Centronics
d. DB15

c. USB or parallel Centronics

The digital method of representing characters by using combinations of zeroes and ones is called:

a. decimal
b. alpha
c. duplex
d. binary

d. binary

FM utilizes ___ where AM utilizes signal level variations.

a. frequency variations
b. power variations
c. sideband modulations
d. period modulations

a. frequency variations

What decimal number is represented by the binary number 01101010?

a. 6A
b. 53
c. 106
d. 152

c. 106

Decimal 50 would appear as _____ in Hex.

a. 32
b. 62
c. 106
d. 152

a. 32

Of these choices, the display of a DMM would probably be:

a. LCD
b Pointer
c. CRT
d. Floating ball

a. LCD

A disadvantage of LCD (liquid crystal display) is:

a. high current demands
b. environmental temperature sensitivity
c. slow reactance to input
d. vibration sensitivity limitations

b. environmental temperature sensitivity

A series DC motor, with no load:

a. tends to stop or not start
b. may be damaged by excessive speed
c. reverse directions
d. becomes an AC generator

b. may be damaged by excessive speed

Which motor maintains constant speed with changing loads?

a. series
b. shunt
c. servo
d. buck-boost

b. shunt

A small power drill or electric mixer would probably be powered by a/an ___ motor.

a. three-phase
b. induction
c. series
d. parallel

c. series

The rotor in an induction motor is not connected to AC or DC power.

a. True
b. False

a. True

0 dBm, when referring to audio signals means:

a. decibels referencing 1 milliwatt
b. decibels referenced to 1 millivolt pk-pk
c. decibels referenced to 1 volt pk-pk
d. zero signal output

a. decibels referencing 1 milliwatt

If a class A differential amplifier is using only one of its two possible inputs, what will the output signal shape be?

a. zero
b. exactly same as the one input
c. equal in amplitude and frequency to input
d. smaller than if two in-phase input signals were applied

b. exactly same as the one input

Voltage is:

a. potential difference between two points
b. amount of current flow
c. quantity of electronics moving in conductors
d. opposition to resistance

a. potential difference between two points

"_____" is a term describing many op-amp circuits

a. inverting
b. bi-directional
c. low-pass
d. open-quadrature

a. inverting

The gain of an op-amp is inversely related to band width as input frequency increases.

a. Always
b. Never

a. Always

The audio detector circuit in an AM radio most commonly is a:

a. discriminator circuit
b. bridge circuit
c. transformer
d. diode

d. diode

A differential amplifier with two identical in-phase signals on the inputs will have an output:

a. of zero
b. twice the input, same shape
c. one half the input signal

a. of zero

A free running oscillator is also called a monostable multivibrator

a. true
b. false

b. false

A fuse which has its fusible wire wrapped around an insulator is:

a. a slo-blo type fuse
b. an inductive fuse
c. a capacitive fuse
d. high voltage use

a. a slo-blo type fuse

The power transformer in a power supply:

a. always step voltage up
b. always step voltage down
c. might step voltages up or down
d. always step current up

c. might step voltages up or down

Which of the below would be considered "basic" components of a non switching power supply?

a. zener, regulator, transformer, SCR
b. regulator, diodes. AC power, laod
c. transformer, bridge, capacitor, load
d. filter, rectifier transformer

d. filter, rectifier transformer

The average of a full sine wave rectified voltage is:

a. .637 x Peak
b. .707 x Peak
c. .707 x Peak to Peak
d. 1.414 c Average

a. .637 x Peak

The ripple frequency for a half wave rectifier operating from 60 Hz electrical power is:

a. 30 Hz
b. 60 Hz
c. 120 Hz
d. 240 Hz

b. 60 Hz

The effective voltage of a 100V Pk-to-Pk sine wave is:

a. 35.35 VAC
b. 70.70 VAC
c. 141.4 VAC
d. 31.8 VAC

a. 35.35 VAC

PtoP/2=P

100/2=50

Px.707=VAC

50x.707=35.35

A pi filter is an inductor with:

a. a capacitor at each end to common
b. a capactior at each end in series
c. a resistor at each end to common
d. a resistor at each end in series

a. a capacitor at each end to common

Carbon microphone are much like variable:

A. Capacitors

B. Resistors

C. Thermistors

D. Inductors

B. Resistors

An inductor opposes any change in:

a. voltage
b. current
c. frequency
d. reactance

b. current

A capacitor opposes any change in:

a. voltage
b. current
c. frequency
d. reactance

a. voltage

Moving one plate of a capacitor further away from the other will:

a. decrease capacitance
b. increase capacitance
c. decrease volt rating
d. increase mutual inductance

a. decrease capacitance

The fact that an inductor opposes any change in current is true of:

a. AC signals only
b. DC signals only
c. AC and DC signals
d. VHF signals more than UHF

c. AC and DC signals

If you increase the value of a capacitor, the capacitance reactance will:

a. increase
b. decrease

b. decrease

In checking a capacitor to see if it is shorted, open or leaky, you would use the ___ ohm meter range.

a. lowest
b. highest

b. highest

The capacitor in a power supply capacitive filter:

a. is in series with the load
b. is in parallel with the load
c. requires serial choke
d. must be in parallel with choke coil

b. is in parallel with the load

The time required to discharge a capacitor depends on the ____ across in terminals.

a. the total capacitance
b. the total resistance
c. the total inductance
d. combination of LRC

d. combination of LRC

What a given filter type, pure filtering is easiest with:

a. low frequencies
b. high frequencies
c. mid frequencies
d. any frequencies

b. high frequencies

Using a resistor instead of an inductor in a power supply pi filter:

a. less expensive
b. less efficient
c. doesn't filter AC well
d. all of the above

d. all of the above

A power supply whose output voltage does not change whether the load is light or heavy, would have what percent of regulation?

a. 100
b. 50
c. 20
d. 0

d. 0

A power supply which measures 50 volts when under no load and 40 volts under a full load has what percentage regulation using the % of regulation formula:
(% = (EnL - EfL) / EfL x 100)?

a. 100
b. 50
c. 25
d. 0

c. 25

Correctly connecting a properly rated zener diode across a power supply load will:

a. protect the power transformer
b. increase output DC
c. limit the output DC
d. eliminate ripple

c. limit the output DC

A Triac in a power control circuit:

a. provide regulation
b. limits surges
c. acts as a fuse
d. acts as an on/off switch

d. acts as an on/off switch

Which wire gauge has the largest diameter?

a. 20
b. 24
c. 28
d. 32

a. 20

What specification should NOT be of concern regarding wire conductors?

a. resistance
b. capacitance
c. length
d. cross sectional area

c. length

The normal open circuit voltage for each nickelcadmium cell is approx ____.

a. 1.2
b. 2.1
c. 3.4
d. 6.3

a. 1.2

Lead free type solder for electronics work is made from:

a. silver and bismuth
b. lead and tin
c. silver and tin
d. acid core

c. silver and tin

Soldering stations used for electronics circuit-board work have historically been (approx.):

a. 5 watts
b. 30 watts
c. 100 watts
d. 250 watts

b. 30 watts

Solder flux mainly:

a. removes foreign material on soldering iron
b. removes oxides on metals to be soldered
c. control temperature of solder
d. cause conductor-to-solder- chemical adhesion

b. removes oxides on metals to be soldered

Laminations used for the core of a transformer:

a. must physically made metal to metal contact
b. must be insulated from each other
c. increase eddy currents
d. reduce counter emf in windings

b. must be insulated from each other

I = 1 amp, R = 10,000 ohms. what is the value of the voltage?

a. 1 volts
b. 10 volts
c. 100 volts
d. 10,000 volts

d. 10,000 volts

A capacitor will charge to what percent of full charge in on RC time?

A. .707

B. 33.3

C. 63.2

D. 67.6 

C. 63.2

if R = 200 ohms and I = .02 amps. What is the value of P(power)?

a. .08 watts
b. .8 watts
c. 4 watts
d. 8 watts

a. .08 watts

Which frequency will have a higher loss when using coaxial cable transmission line?

a. 550 kHz
b. 27 MHz
c. 470 MHz
d. 1 GHz

d. 1 GHz

A ____ is a reference antenna that all other antennas will gain are compared to.

a. yagi
b. omni
c. mast
d. dipole

d. dipole

A high frequency antenna ____ than a low frequency one

a. is thicker
b. is shorter
c. has more gain
d. is longer

b. is shorter

Standing waves on a transmission cable:

a. indicate max power out
b. indicate less than optimal transmission
c. can be caused by poor termination
d. can be located with voltmeter

c. can be caused by poor termination

Sideband frequencies are produced when a radio carrier frequency is:

a. modulated
b. transmitted at minimum power level
c. fed to splitter
d. radiated into space

a. modulated

Doubling the power in a transmitter output signal is a ____ dB gain.

a. 1
b. 3
c. 6
d. 10

b. 3

0 dB mV is what level of received TV signal?

a. zero
b. .0001 volt
c. 1000 microvolt
d. 1 volt

c. 1000 microvolt

A byte is:

a. 4 bits
b. 8 bits
.c. 16 bits
d. 32 bits

b. 8 bits

In a 3-input AND gate:

a. 1 input must be high to have a high output
b. 2 inputs must be high to have high output
c. 3 inputs must be high to have a high output
d. all inputs must be high to have low output

c. 3 inputs must be high to have a high output

An LCD operates by polarizing the light through filters. The fluid rotates the light ___ degrees.

a. 30
b. 45
c. 90
d. 180

c. 90

To test an SCR with an ohmmeter:

a. cannot be done
b. check resistance same as transistors
c. with + to anode and - to cathode, short gate and anode together. should go from near "open" to near "short"
d. with - to anode and + to cathode, short gate and cathode together. should go from near "open" to near "short"

c. with + to anode and - to cathode, short gate and anode together. should go from near "open" to near "short"

Using the R x 100 range and testing between the source and drain of an N channel JFET:

a. readings should be equal in both directions
b. with positive to anode., reading should be 1/100th that of opposite polarity
c. with negative on anode, reading should be 1/100th that of opposite polarity
d. this check provides no useful information

a. readings should be equal in both directions

With + voltage to drain or source and a - voltage to the gate on an N channel JFET, internal resistance of the JFET will be:

a. low
b. high
c, high to drain, low to source
d. high to source, low to drain

b. high

Which is the LEAST likely to cause ESD damage to a MOSFET?

a. flux
b. solder sucker
c. human finger
d. wick

a. flux

A logic probe:

a. injects signals into logic circuits
b. indicates high and low voltage conditions
c. measures dB levels
d. displays voltage levels on an analog scale

b. indicates high and low voltage conditions

In a typical electrical generator, a small AC voltage applied to the field windings is able to control the output level of the generator.

a. true
b. false

b. false

When working with and testing lead-acid batteries:

a. wear eye protection in case battery caps are off
b. short between terminals only if well ventilated area
c. when charging, keep room closed off
d. always wear eye protection, never cause a spark and charge in a ventilated room

d. always wear eye protection, never cause a spark and charge in a ventilated room

Audio signals, such as the output from DVD players, satellite receivers and preamplifiers, usually are of what amplitude for input to a TV, modulator or other equipment?

a. 100 microvolts peak-to-peak
b. 1000 microvolts pk-to-pk
c. 1 millivolt pk-to-pk
d. 1 volt pk-to-pk

d. 1 volt pk-to-pk

Which of these signal parameters does a spectrum analyzer show?

a. current and phase
b. leakage capacitance
c. video color signal separation
d. magnitude and frequency

d. magnitude and frequency

Permanent, no-volatile, non-removable data storage in a computer is:

a. RAM
b. ROM
c. Flash
d. Optical disk

b. ROM

What should be used first to clean a corroded plated soldering iron tip?

a. coarse emery cloth while cold
b. wet sponge with acid core solder after heating
c. file
d. flux, cloth after heating

d. flux, cloth after heating

When soldering high voltage connections:

a. it is important than a thermal shunt be in place
b. use a minimum of solder
c. leave terminal with smooth and rounded covering of solder
d. leave connection with rough tips

c. leave terminal with smooth and rounded covering of solder

Class AB operation of an audio amplifier means that current flows through the active device(tube transistor, FET, IC) for ___________ degrees of the input signal wave

a. 360
b. 180 < θ < 360
c. 45 but less than 180
d. 90

b. 180 < θ < 360