A ___ boiler has heat and gases of combustion that pass through tubes surrounded by water.

firetube

watertube

cast iron sectional

straight-tube

Firetube

____ combustion occurs when fuel is burned using only the theoretical amount of air.

Perfect

Incomplete

Complete

Partial efficient

The breaking up of fuel into small particles to maximize contact between fuel and air for combustion is ___.

steam priming

convection loading

atomization

carbon surging

The ___ is the highest pressure in pounds per square inch at which a boiler can be operated safely.

NOWL

ASME

MAWP

LWFC

___ pressure is the pressure caused by the weight of air surrounding the Earth.

Atmospheric

Thermal

Gauge

Absolute

Atmospheric

The amount of energy required to raise the temperatue of 1lb of water 1degF is 1__

NOWL

therm

psia

Btu

At sea level, the air pressure is approximately ____ psia.

0

14.7

29.05

none of the above

Air that controls combustion efficiency is ___ air.

control

primary

secondary

tertiary

The evaporation of 34.5 lb of water per hour from and at a feedwater temperature of 212degF is ___.

a factor of evaporation

one boiler horsepower

latent heat of fusion

an evaporation test

The range of the pressure gauge should be ___ times the MAWP of the boiler.

1 to 2

1 1/2 to 2

2 to 3

2 1/2 to 3

Steam is prevented from entering the Bourdon tube of a pressure gauge by a(an) ___.

automatic nonreturn valve

inspector's test cock

OS&Y valve

siphon

Blowback is the ___ in the boiler after the safety valve has opened.

drop in pressure

carryover

increase of pressure

chattering of feedwater valve

In a burner control system, a(n) ___ is an audible electronic alarm that alerts the operator of a condition needing attention.

trouble light

signal relay tone

overpressure signal device

annunciator

To prevent a vacuum from forming when taking the boiler off-line the ___ must be open when pressure is still on the boiler.

safety valve

main steam stop valve

boiler vent

manhole cover

When blowing down a boiler, the quick-opening valve should always be opened ___ and closed ___.

first; first

first; last 

last; first

last; last

___ combustion is caused by self-ignition through chemical action.

Theoretical

Spontaneous

Complete

Pilot

In a steam pressure gauge, the ___ straightens from steam pressure to indicate a pressure reading.

Bourdon tube

steam siphon 

mercury tube

hydrostat

___ discharged from the bottom try cock indicates a low water condition in the boiler.

Steam

Water

Steam and water

Fuel oil

The relieving capacity of a safety valve is measured in ___ that it is capable of discharging under a given pressure.

British Thermal unit (BTU)

boiler horsepower per minute

Btu per boiler horsepower

pounds of steam per hour

The water in the boiler is heated, turns to steam, and leaves the boiler through the __.

feedwater line

main header

main steam line

main branch line

The feedwater ___ valve should be located as close to the shell of the boiler as practical.

check

stop

nonreturn

regulating

A(n) ___ may be required on some boilers to remove oxygen and other gases.

makeup water system

pressure relief valve

feedwater regulator

feedwater heater

The ___ shuts off the burner in the event of low water.

low-water alarm

feedwater regulator

low-water fuel cutoff

automatic low-water feeder

The feedwater regulator is located at the ___.

boiler vent 

MAWP

NOWL

bottom blowdown line

To test a low-water fuel cutoff using an evaporation test, the boiler operator must ___.

close the compression tank valve

secure all the feedwater going to the boiler

completely drain the fuel oil tank

perform a surface blowdown 

Boiler main steam stop valves should be ___ valves.

globe / ball / check / OS&Y gate

___ allow movement caused by the heating and cooling of steam lines.

lagging valves / bottom blowdown valves / header baffles / expansion bends

The ___ is a federal agency that requires all employers to provide a safe environment for their employees.

DOT / ASME / OSHA / ABMA

Condensate in the steam lines can result in ___.

greater boiler efficiency / pure steam produced / foaming / water hammer

A steam strainer should be located on the steam line ___.

before the steam trap / after the steam trap /after the feedwater heater / before the steam header

The Environmental Protection Agency was established to control and abate pollution in the areas of ___.

air / water / toxic substances / all of the above

A ___ is the valve used to bring a boiler online or take the boiler offline.

gate valve / boiler stop vent / blowdown line check valve / main steam stop valve

The ___ valve protects the fuel oil lines and pump from excessive pressure.

safety / bypass / relief / stop

A high vacuum on the fuel oil suction gauge normally indicates ___.

low viscosity or a clogged vent / a closed discharge valve or hot fuel oil / cold fuel oil or a dirty strainer / a clogged burner circulation line

___ coal is ground to a fine powder.

Anthracite / Bituminous / Pulverized / none of the above

A(n) ___ is a safety device that senses if the main flame is lit.

low-water fuel cutoff / annunciator / flame scanner / none of the above 

___ combustion occurs when all the fuel is not burned, resulting in the formation of soot and smoke.

Incomplete / complete / perfect / imperfect

___ fire is burning the maximum amount of fuel in a given unit of time.

low / high / variable / modulating

A therm is equivalent to ___ Btu.

100,000 / 150,000 / 500,000 /1,000,000 

An accumulation of natural salts and silica is ___.

scale / titration / pitting / none of the above

A surface blowdown is used when ___ occurs in the boiler.

sludge / foaming / scale on the bottom / corrosion

Boiler water with a pH less than 7 is ___.

alkaline / acidic / neutral / none of the above

The heating value for natural gas is usually expressed in ___.

therms /Btu / API / psi

Pulverized coal is burned ___ in the furnace.

on the scale / in the ignition arch / in suspension / as large particles

The ASME International Boiler and Pressure Vessel Code governs and controls ___.

types of boiler material / methods of boilers construction / procedures used in the installation of boilers / all of the above

Higher numbered fuel oils produce ___ lower numbered fuel oils.

more Btu/gal. than / fewer Btu/gal. than / the same number of Btu/gal. as / none of the above

In the event of a flame failure, the programmer will ___.

automatically go through a new firing cycle / secure the fuel, purge the furnace, and shut down / secure the feedwater line / close the air vents

Forced draft and induced draft are two types of ___ draft.

natural / mechanical / induced / all of the above

A ___ is a simple draft gauge consisting of a U-shaped glass tube.

pyrometer / dynometer / manometer / trynometer

Draft in a boiler is commonly measured in ___.

inches of mercury / pounds per square inch / gallons per hour / inches of water column

In a(n) ___ draft system, air is pushed through the boiler with fans located in front of the boiler furnace.

force / induced / combination / natural

Nonadhering sludge is best removed when the boiler is ___.

under light load /under heavy load / being drained / being tested

The ___ is used to convey gases of combustion from the boiler to the chimney.

flow duct / damper / breeching / refractory

After testing the flame scanner, the ___.

burner should go to high fire / burner should shut down / fuel oil return needs to be inspected / burner tip needs to be cleaned

When a manometer is properly connected, the same level reading in both legs of the manometer indicates ___ draft.

natural / positive / negative / no

___ in the boiler water causes corrosion and pitting of the boiler metal.

Sodium sulfite / Sodium sulfate / Nitrogen / Oxygen

An ___ is printed material used to relay chemical hazard information from the manufacturer to the employer.

OSHA CFR / MSDS / NFPA bulletin / EPA certificate

Bottom blowdown is best performed when the boiler is ___.

under light load / under heavy load / at maximum steam pressure / being tested

The heating value of fuel oil is expressed as ___ per gallon.

Btu / radiant transfer / conduction / psig

___ is when water leaves the boiler with steam.

Superheated steam / Saturated steam / Carryover / Surface blowdown

___ the required frequency of blowdown of a boiler.

A flue gas analysis is used to determine / The boiler operator decides / a boiler water analysis is used to determine / all of the above

Sensors used for flame detection in boiler include ___ flame sensors.

infrared / ultraviolet / photocell / all of the above

Carryover is dangerous and could lead to ___.

dry steam /  water hammer / a furnace explosion / air in the steam

Boiler water with a pH of 11 is ___.

alkaline / neutral / acid / hard

Fuel oil grades commonly used in boilers are designated by No. ___ for the lightest grade through No. ___ for the heaviest grade.

1; 4 / 1; 5 / 2; 4 / 2; 6

Neutral on the pH scale is ___.

0 / 4 / 7 / 14

The first thing a boiler operator should do when taking over a shift is ___.

read the boiler room log / check the fuel supply / blow down the flash tank / check the boiler water level

The ASME Code states that on boilers having two bottom blowdown valves, the ___ valve should be closes to the boiler.

slow-opening / quick-opening / OS&Y / globe

If water cannot be seen in the gauge glass, ___.

water must be added immediately / the boiler inspector should be notified / the fusible plug must be inspected / the feedwater and burner should be secured

A(n) ___ draft is produced by a fan supplying air to the furnace.

natural / forced / induced / balanced

A(n) ___ test is used to check for leaks in the boiler after major repairs have been made.

evaporation /low-water /caustic / hydrostatic

hydrostatic

When the flame scanner is removed with the burner firing, the ___.

fuel valve should open / programmer should start the firing cycle / burner should shut off / all of the above

During the hydrostatic test, pressure on the boiler is brought up to ___ times the MAWP.

1 1/2  ;   2   ;   2 1/2   ;   5

Nonadhering sludge is removed from the boiler by using the ___.

bottom try cock / gauge glass blowdown valve / all of the above

The boiler vent is opened ___.

when adding feedwater chemicals / on high fire / when draining the boiler / whenever the feedwater pump is running

CO in the flue gas is an indication of __ combustion.

complete / incomplete / perfect / theoretical

___ are separate pieces of equipment not attached to the boiler room but required to operate the boiler.

fittings /auxiliaries / breeching components / inspection plates

The burner should always be started in ___.

high fire / maximum steam load / low fire / postpurge mode

During a(n) ___ test, the boiler is completely filled with water.

evaporation / try level / hydrostatic / steam header pressure

Water that contains large quantities of dissolved minerals is called ___.

soft water / hard water / sludge / sediment

If there is a danger of the boiler freezing, the boiler should be laid up ___.

with a light fire / by using steam from the header / completely dry / by using an antifreeze

The ___ uses a four-color diamond-shaped sign to display basic information about hazardous material.

RTK label /HMIG label / NFPA Hard Signal System / ASME symbol stamp

Boiler valves should be opened ___ to prevent water hammer.

quickly / slowly / rapidly and often / none of the above

A furnace explosion can be caused by ___.

a buildup of combustible gases or vapors / leaking gas or fuel oil / improper furnace purge / all of the above

___ fuel oil is very thick and needs to be heated so that it flows.

No. 2 / No. 3 / No. 4 / No. 6

When blowing down the boiler, the quick-opening valve should be ___.

opened first and closed last / opened last and closed last / opened first and closed first / opened last and closed first

A lockout/tagout may be removed ___.

by the worker who installed it / by authorized personnel / in accordance with written lockout/tagout procedures / all of the above

In order to decrease the viscosity of fuel oil, it is necessary to ___.

decrease its temperature / decrease its flash point / increase its temperature / increase its flash point

An example of confined space is a(n) ___.

electrical cabinet / feedwater line / fuel oil tank  / gas line

A ___ is the application of a restraint to prevent equipment operation during maintenance and repair.

tagout / lockout / shutdown order / danger tag

A fire caused by oil, gas, grease or paint is a Class ___ fire.

A / B / C / D

After the total force of the steam has lifted the safety valve off its seat, s team enters the ___.

huddling chamber / combustion chamber / steam holding tank / main steam line

___ are used in boilers to direct the gases of combustion over the boiler heating surface.

combustion controls / firetube / baffles / zone control

A ___ is anything that transfers heat from one substance to another without allowing the materials to mix.

thermometer / heat exchanger / thermostat / regulator

___ air controls the combustion rate, which determines the amount of fuel that can be burned.

excess / primary / secondary / pilot

The nonflamable material used to insulate the outer surface of the boiler from heat is ___.

refractory / steam bracing / conduction bricking / tube bank

The ___ of fuel oil is the lowest temperature at which it will flow as a liquid.

fire point / flash / pour point / viscosity

A high pressure boiler ___.

operated with NOWL greater than 15 gal/hr ; has a MAWP greater than 15 BHP ; operates at a pressure more than 15 psi / operates at a pressure up to 212 psi

The evaporation of 34.5 lb of water per hour from and at a feedwater temperature of 212degF is ___.

a factor of evaporation / one boiler horsepower / latent heat of fusion /an evaporation test

The pressure at the base of a vertical foot of water is ___ psi.

0.433 / 8.3 / 14.7 / 34.5