question

15 psi

answer

A low pressure steam boiler has a maximum allowable working pressure (MAWP) of up to ___.

question

One boiler horsepower

answer

The evaporation of 34.5 lb of water/hr from and at a feedwater temperature of 212°F

question

through the tubes

answer

In a firetube boiler, the heat and gases of combustion pass ___.

question

in high or low pressure plants

answer

A firetube boiler may be used ___.

question

a firetube boiler

answer

Because of the large volume of water, the boiler most likely to cause a boiler explosion is ___.

question

firetube

answer

A horizontal return tubular (HRT) boiler is a ___ boiler.

question

temperature

answer

As steam pressure in a boiler increases, there is a corresponding increase in the ___.

question

a boiler explosion

answer

A sudden drop in boiler steam pressure without a corresponding drop in boiler water temperature could result in ___.

question

heating surface

answer

The part of a boiler that has the heat and gases of combustion on one side and water on the other side is known as the ___.

question

thermal

answer

The comparison, or ratio, of heat supplied in fuel to heat absorbed by water is defined as ___ efficiency.

question

boiler heating surface

answer

Baffles are designed to direct the gases of combustion so that they come into close contact with the ___.

question

stays

answer

The steam and water drum of watertube boilers is dished (concave) to eliminate the need for ___.

question

waterwalls

answer

To increase the life of a furnace refractory, some watertube boilers are equipped with ___.

question

high ceilings, less floor space, and the use of staybolts

answer

Vertical firetube boilers require ___.

question

around the tubes

answer

In a watertube boiler, the heat and gases of combustion pass ___.

question

firetube

answer

The ___ boiler has a large volume of water in relation to horsepower size.

question

a firetube boiler (high or low pressure)

answer

Stays and braces are needed to prevent bulging in ___.

question

watertube

answer

The ___ boiler was developed to provide steam at higher pressures.

question

watertube

answer

The mud drum is the lowest part of the water side of a(n) ___ boiler.

question

tensile

answer

Boiler plates and staybolts are subjected to ___ stress.

question

American Society of Mechanical Engineers (ASME)

answer

Safety valve connections must be approved by the ___.

question

safety and efficiency

answer

Boiler fittings are necessary for ___.

question

safety valve

answer

The most important fitting on a boiler is the ___.

question

safety valve

answer

To prevent failure from pressure over the MAWP, all steam boilers must be equipped with at least one ___.

question

prevent the boiler from exceeding its MAWP

answer

A safety valve will ___.

question

pop open

answer

Safety valves are designed to ___.

question

before the main safety valves are set to open

answer

Superheater safety valves are set to open ___.

question

at least 75% of the popping pressure

answer

When testing a safety valve by hand, there must be ___.

question

safety valve manufacturer or manufacturer's authorized representative

answer

Any repairs to a safety valve should be done by the ___.

question

qualified person who is familiar with the contruction and operation of a safety valve

answer

The setting or adjusting of a safety valve should only be done by the ___.

question

an accumulation test is put on the boiler

answer

If it is necessary to test the relieving capacity of a safety valve, ___.

question

pounds of steam per hour capable of discharging under a given pressure

answer

The relieving capacity of a safety valve is measured in ___.

question

reduce turbulence in the gauge glass to get a more accurate reading of the water level in the boiler

answer

The main purpose of a water column is to ___.

question

a secondary means of determining water level in a boiler.

answer

Try cocks are ___.

question

using the try cocks

answer

When replacing a broken gauge glass, the water level is checked by ___.

question

once a shift

answer

The water column and gauge glass should usually be blown down ___.

question

warn the operator of high or low water

answer

A whistle valve is used to ___.

question

pounds per square inch

answer

A steam pressure gauge is calibrated in ___.

question

high temperature of steam

answer

A siphon protects the steam pressure gauge from ___.

question

0.433

answer

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

question

highest part of the steam side of the boiler

answer

The boiler vent is located at the ___.

question

there is 10 to 15 psi of steam pressure on the boiler

answer

The boiler vent is open when warming up a boiler until ___.

question

changing the direction of the steam flow

answer

Steam separators work on the principle of ___.

question

upper part of the steam and water drum

answer

The dry pipe is located in the ___.

question

boilers equipped with superheaters

answer

Cyclone separators are used in ___.

question

its corresponding temperature and pressure

answer

Saturated steam is steam at ___.

question

temperature increases with no increase in pressure

answer

When steam is superheated the ___.

question

a continuous flow of steam

answer

Superheater tubes are protected from warping or burning out by ___.

question

removed from boiler tubes for better heat transfer

answer

Soot should be ___.

question

watertube boilers

answer

Soot blowers are mainly found on ___.

question

cut through the boiler tubes in a very short period of time

answer

Steam impinging on boiler tubes would ___.

question

highest part of the steam side of the drum

answer

To ensure that moisture-free steam goes to the soot blower, the steam line to the soot blower must come off the ___

question

two main steam stop valves

answer

Boilers in battery equipped with manhole openings must have ___ according to the ASME code.

question

Os&y gate

answer

Main boiler stop valves must be ___ valves.

question

installed as close to the shell of the boiler as practical on the main steam line

answer

The ASME code will allow an automatic nonreturn valve to be used as a main steam stop valve. If one is used it must be ___.

question

offer no restriction to the flow of steam

answer

The main steam stop valves should be gate valves because they ___.

question

slightly lower than line pressure

answer

When the boiler is equipped with hand-operated, main steam stop valves, to cut the boiler in on the line, the steam pressure on the incoming boiler should be ___.

question

closed, locked, and tagged.

answer

When a boiler is being inspected, the two main steam stop valves are ___.

question

free-blowing drain should be open

answer

During boiler warm-up, to remove any condensate trapped between the two boiler stop valves the ___.

question

expansion bends are used

answer

During normal usage, the boiler main steam line expands and contracts. To allow for this ___.

question

two bottom blowdown valves

answer

According to the ASME code, boilers operating at 100 psi or over must have ___.

question

opened first and closed last

answer

When blowing down a boiler equipped with a quick-opening valve and a screw-type valve, the quick-opening valve is ___.

question

between the boiler and the slow-opening (screw-type) valve

answer

If a quick-opening valve is used as a bottom blowdown valve, it must be located ___.

question

2 ½

answer

The maximum size of the bottom blowdown line and the surface blowdown line is ___".

question

mud drum

answer

Bottom blowdown lines on a watertube boiler are located on the ___.

question

boiler water analysis

answer

The most accurate means of deciding the frequency of blowdown of a boiler is determined by a ___.

question

impurities that float on the surface of the water

answer

Surface tension on the water in the steam and water drum is increased by ___.

question

blowdown tanks are used

answer

To protect sewer lines from the high temperature and high pressure coming from the boiler blowdown lines, ___.

question

20,000 lb of water/hr

answer

A boiler generating 20,000 lb of steam/hr must be supplied with at least ___.

question

in the open deaerator feedwater heater

answer

Oxygen and other noncondensable gases are separated form the feedwater ___.

question

steam, feedwater, fuel, and draft

answer

The four systems required to operate a steam boiler are ___.

question

one lb of water

answer

In order to produce one pound of steam, it is necessary to evaporate ___.

question

condensate

answer

Steam that has lost its heat and has turned back into water is ___.

question

be used for process work and heating

answer

Steam is extracted from the turbine after it has passed through some of the turbine stages to ___

question

to the feedwater pump

answer

Water from an open deaerating feedwater heater flows ___.

question

one steam and one electric feedwater

answer

A safe and efficient boiler plant should include ___ pump(s).

question

passed through tubes to cause steam to condense, causing a vacuum

answer

A surface condenser has water ___.

question

stop

answer

On the feedwater line near the boiler is a check valve and a stop valve. The valve closest to the shell of the boiler is the ___ valve.

question

volume of air passing through the venturi tube

answer

On a boiler burning low pressure gas, the volume (amount) of gas burned is controlled by the ___.

question

allow one strainer to be cleaned without securing the boiler

answer

On the fuel oil system, the purpose of the duplex strainers on the suction line between the tank and fuel oil pump is to ___.

question

induced

answer

A draft fan located between the boiler and chimney is used in a(n) ___ draft system.

question

more heat energy, thus producing more work

answer

When steam is superheated it has ___.

question

reduces back pressure and steam flow rate

answer

The vacuum on the exhaust side of the turbine ___.

question

above the feedwater pump(s)

answer

The open feedwater heater is located ___.

question

6

answer

No. ___ fuel oil must be heater in order to be pumped.

question

hand firing was inefficient in larger-sized boilers

answer

Coal stokers were developed because ___.

question

can come in closer contact with the oxygen for complete combustion

answer

Pulverized coal has the consistency of talcum powder so that it ___.

question

air or gases to flow

answer

Draft is defined as a difference in pressure that causes ___.

question

high pressure

answer

Air is mixed inside of the burner register in a(n) ___ gas system.

question

difference in temperature of a column of gas inside the chimney from a column of air outside the chimney

answer

Natural draft is produced by a(n) ___.

question

suspension

answer

Pulverized coal is burned in ___ in the furnace.

question

gas company representative

answer

Gas leaks should be located and repaired by a ___.

question

8.3

answer

Water weighs approximately ___ lb/gal.

question

maintain a water level in the feedwater heater if there are insufficient condensate returns

answer

The automatic city water makeup valve found on an open feedwater heater is used to ___.

question

maintain a consistent water level in the boiler

answer

The purpose of a feedwater regulator is to ___.

question

at the NOWL

answer

Feedwater regulator sensing elements are located ___.

question

diameter of steam piston, diameter of water piston, and length of pump stroke

answer

The sequence of three numbers found on the data plate attached to a reciprocating feedwater pump indicates the ___.

question

induced

answer

A(n) ___ draft fan must be used to overcome resistance caused by gases of combustion leaving the boiler when an economizer is used.

question

pump and the discharge valve

answer

A reciprocating feedwater pump must have a safety relief valve located between the ___.

question

feedwater using gases of combustion

answer

An economizer is used in large boiler plants to heat ___.

question

is converted into pressure

answer

The theory of operation of a centrifugal pump is that the centrifugal force of a rotating element ___.

question

open or closed

answer

Centrifugal feedwater pumps can be started with their discharge valves ___.

question

positive displacement pump

answer

A turbine feedwater pump differs from a centrifugal feedwater pump in that it is a ___.

question

safety relief valve must be installed on the discharge line

answer

To protect the turbine pump from excessive pressure, a(n) ___.

question

check valve can be repaired without taking the boiler off-line

answer

The feedwater stop valve on the feedwater line is located closest to the shell of the boiler so that the ___.

question

the feedwater pump to become steambound

answer

Water temperature that is too high in the open feedwater heater could cause ___.

question

oxygen pitting in the boiler

answer

Water temperature that is too low in the open feedwater heater could cause ___.

question

when both superheated and saturated steam are needed, with a pressure-reducing station, and with feedwater addition to desuperheat the steam

answer

A line desuperheater is typically used ___.

question

heat energy

answer

Burning a fuel releases ___.

question

pressure buildup, which would cause an oil spill

answer

A clogged vent line on a fuel oil tank being filled with fuel oil could result in a ___.

question

signs of sludge and water are evident in the tank

answer

A high suction line on a fuel oil tank is used when ___.

question

circulate fuel oil during warm-up, return fuel oil that bypasses the burner, and return fuel oil from the relief valve

answer

The purpose of the fuel oil return line is to ___.

question

live steam and air

answer

In both steam and air atomizing burners, atomization is accomplished by ___.

question

manual reset valve

answer

In a low pressure gas burner, a ___ shuts off the gas supply if a low water condition exists.

question

indicate gallons of fuel oil in the tank

answer

The pneumercator is used to ___.

question

a large pressure drop

answer

An indication of a dirty fuel oil strainer would be ___ across the strainer.

question

both the suction and discharge sides

answer

Duplex strainers are found on ___ of the fuel oil pump.

question

6

answer

Fuel oil heaters must be used when burning No. ___ fuel oil.

question

on the discharge side of

answer

Fuel oil heaters must be protected from excessive fuel oil pressure because they are located ___ the fuel pumps.

question

a spinning cup and high velocity air

answer

The rotary cup burner atomizes fuel oil using ___.

question

rotating, high pressure oil coming out of the plug or sprayer plate

answer

In a pressure atomizing burner, atomization is accomplished by ___.

question

desired pressure at the burner

answer

A gas pressure regulator is used to control the ___.

question

as an automatic gas shutoff valve

answer

A solenoid valve is a direct-acting valve in the gas system and is used ___.

question

warm air is used

answer

To prevent caking and to dry the coal entering the pulverizer, ___.

question

supply air for combustion

answer

Blowers are used in a high pressure gas system to ___.

question

air damper, butterfly valve, and modulating motor and linkage

answer

The air-to-gas ratio is maintained by a(n) ___.

question

Venturi effect

answer

The amount of gas drawn into the air stream in a low pressure gas system is controlled by the ___.

question

more flexible operation

answer

Boilers are equipped with a combination gas/fuel oil burner for ___.

question

anthracite or bituminous coal

answer

The underfeed stoker can burn ___.

question

in suspension and on grates

answer

Spreader stokers burn coal ___.

question

under and over the fuel bed

answer

To achieve complete combustion in a spreader stoker, air is introduced ___.

question

hopper

answer

The thickness of the fuel bed on a chain grate stoker is regulated by a coal ___.

question

in suspension

answer

Pulverized coal burns ___.

question

butterfly

answer

The volume of gas to the burner in a high pressure gas system is controlled by a ___ valve.

question

15

answer

In order to burn 1 lb of fuel, approximately ___ lb of air are needed.

question

inches or tenths of an inch of a vertical water column

answer

Draft is measured in ___.

question

atmosphere; inside the boiler setting

answer

Draft in the boiler is measured between two points such as the ___ and ___.

question

greater than

answer

Pressure at the discharge side of a forced draft fan is ___ atmospheric pressure.

question

economizers and air heaters

answer

To reduce the heat loss of flue gases going to the chimney, boilers are equipped with ___.

question

move up while the air goes down

answer

The convection air heater employs a counterflow principle in which the gases of combustion ___.

question

the use of bypass dampers

answer

Both air and flue gas temperatures are controlled by ___.

question

condensation on the gas side of the air heater

answer

If the temperature of air entering the heater gets too low, it will cause ___.

question

using soot blowers

answer

Air heaters must be cleaned to ensure good heat transfer by ___.

question

have a fairly constant steam load

answer

Air heaters can most successfully be used in plants that ___.

question

a loss of air for combustion and lower boiler efficiency

answer

If air supplied for combustion mixes with gases of combustion, it could lead to ___.

question

inches of water

answer

A diaphragm draft gauge is calibrated in ___.

question

power-driven fans

answer

Mechanical draft is produced by the ___.

question

forced or induced

answer

Mechanical draft can be classified as ___.

question

height of the chimney

answer

The amount of draft available in a natural draft system is dependent on the ___.

question

outlet dampers

answer

The gases of combustion leaving a boiler that has natural draft are controlled by ___.

question

between the boiler and the chimney

answer

The induced draft fan is located ___.

question

fuel oil, coal, and gas

answer

Mechanical draft is used when burning ___.

question

both forced and induced draft fans

answer

Larger steam boilers that are equipped with air heaters and/or economizers must use ___.

question

increase the rate of combustion

answer

When using mechanical draft, it is possible to ___.

question

balanced

answer

Draft pressure maintained at a constant pressure is called a ___ draft system.

question

natural

answer

The oldest form of draft used in a boiler is ___ draft.

question

flyash

answer

Solid particles created in the combustion process are called ___.

question

flash

answer

The temperature at which fuel oil will give off a vapor that will ignite readily when exposed to an open flame is its ___ point.

question

ultimate analysis is used

answer

In order to determine the heating value of coal in Btu per pound, the ___.

question

fire

answer

The temperature at which fuel oil will give off a vapor that burns continuously is its ___ point.

question

degree of hardness

answer

Rank refers to the ___ of the coal.

question

size, heating value, and ash content

answer

Grade refers to the ___ of the coal.

question

moisture content, content of volatile matter, and fixed carbon and ash content

answer

A proximate analysis of coal provides information regarding its ___.

question

elements present in the coal

answer

An ultimate analysis of coal provides information regarding ___.

question

volatile

answer

Bituminous coal has a high ___ content.

question

carbon

answer

Anthracite coal has a high ___ content.

question

is lowered

answer

When the temperature of fuel oil is raised, its viscosity ___.

question

pour

answer

The lowest temperature at which fuel oil will flow is its ___ point.

question

dangerous to use

answer

Fuel oil with a low flash point would be ___.

question

Bituminous

answer

___ coal is the type of coal most likely to have problems with spontaneous combustion when being stockpiled.

question

foam or dry chemical

answer

A ___ fire extinguisher is the correct type to use on fuel oil fires.

question

primary

answer

Air that controls the rate of combustion is ___ air.

question

secondary

answer

Air supplied to the burner that is more than the theoretical amount needed to burn fuel is ___ air.

question

Perfect

answer

___ combustion is when all fuel is burned using only the theoretical amount of air supplied.

question

Complete

answer

___ combustion is when all the fuel is burned using the minimal amount of excess air.

question

formation of soot and smoke

answer

Gases of combustion that cool on contact with the boiler heating surface before combustion is completed cause a(n) ___.

question

21; 79

answer

Air needed for the combustion of fuel is made up of approximately ___% oxygen and ___% nitrogen.

question

incomplete

answer

Soot and smoke are the result of ___ combustion.

question

Carbon, sulfur, and hydrogen

answer

___ is a combustible found in fuel.

question

complete combustion

answer

Carbon dioxide (CO2) in the flue gas indicates ___.

question

incomplete combustion

answer

Carbon monoxide (CO) in the flue gas indicates ___.

question

carbon dioxide, carbon monoxide, and oxygen

answer

The Orsat gas analyzer measures the percentage of ___ in the flue gas.

question

complete, perfect, incomplete

answer

___ is a type of combustion.

question

6

answer

No. ___ fuel oil must be heated to reach the required temperature for combustion.

question

more Btu per gallon than

answer

Higher numbered fuel oils produce ___ lower numbered fuel oils.

question

British thermal units

answer

The heating value of a fuel is expressed in ___.

question

safe and efficient boiler operation

answer

The primary function of a combustion control is to ensure ___.

question

small package, firetube, and watertube boilers

answer

The ON/OFF control system is usually found on ___.

question

start and stop the burner on steam pressure demand

answer

The purpose of the boiler pressure control found in the ON/OFF control system is to ___

question

highest part of the steam side of the boiler

answer

the ON/OFF pressure control must be connected to the ___.

question

steam

answer

A steam siphon ensures that ___ does not enter the boiler pressure control.

question

in a vertical position

answer

A mercury-tube pressure control will only be accurate when it is installed ___.

question

fuel supply; air supply; ratio of air to fuel; removal of combustion gases

answer

The four elements that must be regulated in a combustion control system are ___.

question

set the operating steam pressure range of the boiler

answer

The two scales found on the boiler pressure control are used to ___.

question

regulate the high and low firing rates of the burner

answer

The purpose of the boiler modulating pressure control is to ___.

question

highest part of the steam side of the boiler

answer

The modulating pressure control must be connected to the ___.

question

postpurging

answer

The blower motor control continues to operate after fuel is shut off the burner during ___.

question

control the burner firing cycle

answer

The programmer in the ON/OFF control system is used to ___.

question

a prepurge period

answer

To eliminate the danger of a furnace explosion during startup, the firing sequence must first allow for ___.

question

both the pilot and the main flame

answer

The purpose of the scanner is to prove ___.

question

both the pilot and the main flame

answer

The scanner must be installed on the front of the boiler to sight ___.

question

infrared or ultraviolet rays

answer

The flame sensor is sensitive to ___.

question

secure the fuel, purge the firebox, and then shut down

answer

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

question

air

answer

The positioning combustion control system used on older boilers cannot function without ___ pressure.

question

steam flow and pressure

answer

The metering combustion control system is sensitive to changes in ___.

question

inlet damper, fan intake vanes, and the fan speed

answer

Combustion air is controlled by ___.

question

induced draft fan

answer

Gases of combustion are pulled from the boiler by the ___.

question

steam header pressure

answer

The positioning combustion control system is sensitive to changes in the ___.

question

Mercury-tube

answer

The most common type of pressure control used is the ___type.

question

square inch

answer

Pressure gauges are calibrated in pounds per ___.

question

gauge pressure plus atmospheric pressure

answer

Absolute pressure is equal to ___.

question

1 ½ to 2 times the safety valve setting

answer

A boiler steam pressure gauge should have a range of ___.

question

highest part of the steam side

answer

The boiler steam-pressure gauge must be connected to the ___of the boiler.

question

a siphon

answer

The boiler steam-pressure gauge is protected from high temperatures by ___.

question

to take and read the readings for remote plants centrally

answer

A primary reason for using thermocouples for measuring temperatures is ___.

question

mercury below

answer

Vacuum gauges are calibrated in inches of ___atmospheric pressure.

question

degrees Fahrenheit

answer

Most thermometers used in a steam plant are calibrated in ___.

question

temperature

answer

Thermocouples measure ___.

question

superheated steam, gases of combustion, and condensate return

answer

A ___ reading can be read using a thermocouple.

question

pneumercator

answer

Liquids in a tank may be measured from a remote location using a ___.

question

a variety of fluids

answer

Flow meters measure the rate of flow of ___.

question

venturi, orifice plate, and flow nozzle

answer

The differential-pressure flow meter functions by receiving a difference of pressure across a(n) ___.

question

float in a tapered tube

answer

The rotameter flow meter consists of a ___.

question

rotameter; valve

answer

The types of variable-area flow meters are ___ and ___.

question

give an overall view of the steam plant operation

answer

Recorders are used to ___.

question

smoke density

answer

A Ringelmann chart is used to determine ___.

question

smoke density

answer

Light and a photoelectric cell are sometimes used to indicate ___.

question

the boiler operator cannot always see the chimney to observe smoking conditions

answer

Smoke indicators are often essential because ___.

question

promote safe and efficient operation

answer

Modern steam plants use instrumentation to ___.

question

formation of scale, oxygen pitting, and carryover

answer

Boiler water must be conditioned to prevent ___.

question

solids, gases, and other pollutants from industrial waste.

answer

Natural water may contain ___.

question

caustic embrittlement

answer

Boiler water having high alkalinity could develop ___.

question

scale

answer

Deposits of calcium and magnesium carbonates on the boiler heating surface cause ___.

question

caustic embrittlement

answer

Cracking of the boiler metal along the seams and tube ends is caused by ___.

question

a nonadhering sludge

answer

Chemicals added to the boiler water change the scale-forming salts into ___.

question

pitting of boiler metal

answer

Oxygen in the boiler will cause ___.

question

carryover

answer

Small amounts of water that leave the boiler with the steam is called ___.

question

scale formation on the tubes

answer

A direct cause of overheating of the boiler tubes is ___.

question

water

answer

Priming is dangerous and could lead to ___ hammer.

question

improper boiler water treatment

answer

Scale buildup on the water side of a steam boiler is caused by ___.

question

heating the feedwater and using sodium sulfite

answer

Oxygen present in the boiler water is removed by ___.

question

daily testing of boiler water

answer

The frequency of blowing down a steam boiler is best ascertained by the ___.

question

ambient temperature

answer

The cold lime-soda process softens the boiler water at ___.

question

continuous blowdowns

answer

Closer control of boiler water chemical concentrations is maintained by ___.

question

cold lime-soda, hot lime-soda, and ion exchange

answer

External feedwater treatment conditions the feedwater before it enters the boiler and can be a(n) ___ process.

question

the water level on all boilers that are on the line by blowing down the water column and gauge glass

answer

When taking over a shift, the boiler operator must first check ___.

question

test the low water fuel cutoff control, inspect and check running auxiliaries for proper lubrication, and check the burner and the fire for correct flame, including the fuel temperature and pressure

answer

The duties of a boiler operator taking over a shift are to ___.

question

by blowing down the low water fuel cutoff or allowing the water level in the boiler to drop

answer

The low water fuel cutoff control can be tested ___.

question

hourly readings of all pertinent steam plant data

answer

The operator in charge of a shift must maintain a boiler room log that indicates ___.

question

check for the correct boiler water level

answer

Regardless of the type of fuel being used, before lighting off a boiler during a cold start-up, the operator must first ___.

question

a possible furnace explosion

answer

The purpose of a flame failure control is to protect the boiler from ___.

question

purging the furnace

answer

After establishing the proper boiler water level, the burner may be lit after ___.

question

warmed up slowly

answer

In order to prevent uneven expansion of the boiler on a cold startup, the boiler must be ___.

question

3

answer

During startup, the boiler vent should remain open until a pressure of approximately ___ psi is on the boiler.

question

75% to 85% of the line pressure

answer

The automatic nonreturn valve on a boiler being cut in on a line should be opened when the steam pressure on the boiler reaches ___.

question

before the boiler is cut in on the line

answer

It is good operating procedure to test the safety valve on an incoming boiler by hand ___.

question

closed as soon as

answer

The free-blowing drain between the boiler's automatic nonreturn valve and the main steam stop valve should be ___ the boiler is cut in on the line.

question

slightly lower than

answer

When cutting a boiler in on a line equipped with two hand-operated steam stop valves, the pressure on the boiler should be ___ line pressure.

question

keeping the superheater drain valve open until the boiler is cut in on the line

answer

Boilers equipped with a superheater must be protected during warmup by ___.

question

steam

answer

Superheaters are prevented from overheating by the circulation of ___.

question

soot

answer

To ensure high heat transfer rates, ___ should be removed from boiler heating surfaces.

question

boiler vent

answer

When the steam pressure in the boiler has dropped to 10 psi or 15 psi, the ___ should be opened.

question

NOWL

answer

As the boiler is cooling down, the boiler operator must maintain the ___.

question

cleaned on both the fire and water sides

answer

To prepare a boiler for inspection, the boiler must be ___.

question

a hydrostatic test

answer

After a boiler has had major repair work made on its steam or water side or has developed a low water condition, it should be subjected to ___.

question

flame scanner

answer

Flame failure controls use a ___.

question

layed up either wet or dry

answer

Boilers that are out of service for an extended period of time can be ___.

question

completely dry

answer

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

question

chief engineer

answer

Plant emergency procedures should be established by the ___.

question

warns the operator of high or low water

answer

The whistle valve, which is located in the boiler water column, ___.

question

shuts off the fuel supply

answer

A low water fuel cutoff ___.

question

thoroughly examined for signs of overheating

answer

A boiler that has experienced a low water condition should be ___.

question

bottom

answer

A high water level condition in the boiler can be corrected by using ___ blowdown.

question

either a flame failure or a low water condition

answer

If a boiler that was on-line is down because of low steam pressure, the cause is ___.

question

1 ½ times the safety valve setting

answer

When performing a hydrostatic test, the pressure on the boiler should be increased to ___.

question

an accumulation of combustible gases

answer

A furnace explosion can be caused by ___.

question

year

answer

The ASME code recommends that boilers be inspected internally and externally every ___.

question

confined space permit

answer

Maintenance work performed inside a boiler requires a(n) ___ that contains procedures to prevent possible injury from hazards.

question

the immediate superior

answer

When someone finds an unsafe condition in a plant, that person should report it to ___.

question

extend the life of the equipment, increase overall plant efficiency, and reduce downtime

answer

Preventive maintenance of boiler room equipment can ___.

question

an alkaline detergent solution

answer

New or retubed boilers should be cleaned with ___.

question

protect workers and equipment

answer

The primary purpose of establishing a set of plant safety rules is to ___.

question

person involved

answer

Reporting accidents is the responsibility of the ___.

question

fuel; heat; oxygen

answer

The three ingredients needed to start a fire are ___, ___, and ___.

question

B

answer

A fire caused by oil, gas, grease, or paint would be classified as a Class ___ fire.

question

extra

answer

Locations where painting or dipping is performed are examples of a(n) ___ hazard area.

question

once a shift

answer

The low water fuel cutoff control should be blown down ___.

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