DC 3rd class stationary steam engineer license
Exam Test Bank with 350 Latest Questions and
Correct Answers / 3rd Class Stationary Steam
Engineer License DC Exam Prep Test Bank
when testing the safety valve by hand, it is the accepted practice to have.
_________ - ANSWER-at least 75% popping pressure before testing
oxygen in a boiler drum causes. ________ - ANSWER-pitting
__________ steam turbines allow condensate to be reclaimed for use in the system
- ANSWER-condensing
a deposit of scale or mud in an HRT boiler could cause_____ - ANSWER-a bag to
develop
water wall tubes protect the refractory and_____ - ANSWER-increase boiler
heating surface
steam at E250 psia and 400 degrees Fahrenheit is considered______ Steam -
ANSWER-saturated
sensible heat is heat that_____ - ANSWER-changes a substances temperature but
not its state
1
,extra-heavy pipe must be used on blowdown lines when the steam pressure
exceeds______ psi - ANSWER-125
to check the water level on a boiler online, it is best to_____ - ANSWER-
blowdown the gauge glass
a steam pressure gauge has a siphon between the boiler and the pressure gauge to
_______ - ANSWER-prevent Steam from entering the pressure gauge
if a boiler evaporates 50,000 lbs of steam/hour and is evaporating 10 pounds of
steam/sq ft of heating surface, the heating surface of the boiler is ____sq ft -
ANSWER-5000
it is permissible to have one blowdown valve on a boiler operated under______ psi
- ANSWER-100
at atmospheric pressure, water boils and turns to steam at _____ °f - ANSWER-
212
a steam pressure gauge is protected against excessive temperature by a ______ -
ANSWER-siphon
the only type of safety valve allowed on a boiler by the asme code is a_____ safety
valve - ANSWER-spring-loaded pop
the primary function of a boiler is to _____ - ANSWER-generate steam efficiently
if the burner is firing and no water is in the gauge glass, the best procedure to
follow is to_______ - ANSWER-shut down the burner and secure the boiler
2
,a high pressure boiler operates at a pressure above______ PSI and 6 BHP -
ANSWER-15
a safety valve on a boiler pops______ - ANSWER-between working pressure and
mawp
in a fire tube boiler, the Heat and gases of combustion pass _________ -
ANSWER-through the tubes
as steam pressure in a boiler increases, there is a corresponding increase in the
______ - ANSWER-temperature of steam and water
the safety valve on a boiler _____ - ANSWER-prevents the boiler from exceeding
its mawp
a steam trap ______ - ANSWER-automatically remove sand and water without
loss of steam
the amount of excess air in gases of combustion is normally determined by the
analysis of______ - ANSWER-O2
before lighting off a boiler during a cold startup, the operator must first______ -
ANSWER-check for the correct water level
boiler should be warmed up slowly when starting up to ______ - ANSWER-allow
uniform expansion of drums and tubes
3
, combustion requires____ - ANSWER-fuel, oxygen, and Heat
the three most common fuels used in boilers are _____ - ANSWER-gas, fuel oil,
and Coal
incomplete combustion can be caused by ______ - ANSWER-insufficient air
after replacing a gauge glass but before placing it in service, it is necessary to
______ - ANSWER-crack open the steam valve in warm the gauge glass
two bottom blowdown valves are required on boilers operating at pressures
above______ psi - ANSWER-100
extra heavy steel pipe is required on a boiler bottom blowdown line when the
pressure is above ____ psi - ANSWER-125
package boilers are programmed to _____ - ANSWER-ignite the burner in low
fire
there are________ sq ft of heating surface in a water tube 3 1/2" in diameter and
20' long - ANSWER-18.32
to change 1 lb of water from and at212 °f into steam at atmospheric
pressure,______ btu are necessary - ANSWER-970.3
a surface condenser is one that______ - ANSWER-has circulating water flowing
through the tubes and exhaust steam around the outside of the tubes
4
Exam Test Bank with 350 Latest Questions and
Correct Answers / 3rd Class Stationary Steam
Engineer License DC Exam Prep Test Bank
when testing the safety valve by hand, it is the accepted practice to have.
_________ - ANSWER-at least 75% popping pressure before testing
oxygen in a boiler drum causes. ________ - ANSWER-pitting
__________ steam turbines allow condensate to be reclaimed for use in the system
- ANSWER-condensing
a deposit of scale or mud in an HRT boiler could cause_____ - ANSWER-a bag to
develop
water wall tubes protect the refractory and_____ - ANSWER-increase boiler
heating surface
steam at E250 psia and 400 degrees Fahrenheit is considered______ Steam -
ANSWER-saturated
sensible heat is heat that_____ - ANSWER-changes a substances temperature but
not its state
1
,extra-heavy pipe must be used on blowdown lines when the steam pressure
exceeds______ psi - ANSWER-125
to check the water level on a boiler online, it is best to_____ - ANSWER-
blowdown the gauge glass
a steam pressure gauge has a siphon between the boiler and the pressure gauge to
_______ - ANSWER-prevent Steam from entering the pressure gauge
if a boiler evaporates 50,000 lbs of steam/hour and is evaporating 10 pounds of
steam/sq ft of heating surface, the heating surface of the boiler is ____sq ft -
ANSWER-5000
it is permissible to have one blowdown valve on a boiler operated under______ psi
- ANSWER-100
at atmospheric pressure, water boils and turns to steam at _____ °f - ANSWER-
212
a steam pressure gauge is protected against excessive temperature by a ______ -
ANSWER-siphon
the only type of safety valve allowed on a boiler by the asme code is a_____ safety
valve - ANSWER-spring-loaded pop
the primary function of a boiler is to _____ - ANSWER-generate steam efficiently
if the burner is firing and no water is in the gauge glass, the best procedure to
follow is to_______ - ANSWER-shut down the burner and secure the boiler
2
,a high pressure boiler operates at a pressure above______ PSI and 6 BHP -
ANSWER-15
a safety valve on a boiler pops______ - ANSWER-between working pressure and
mawp
in a fire tube boiler, the Heat and gases of combustion pass _________ -
ANSWER-through the tubes
as steam pressure in a boiler increases, there is a corresponding increase in the
______ - ANSWER-temperature of steam and water
the safety valve on a boiler _____ - ANSWER-prevents the boiler from exceeding
its mawp
a steam trap ______ - ANSWER-automatically remove sand and water without
loss of steam
the amount of excess air in gases of combustion is normally determined by the
analysis of______ - ANSWER-O2
before lighting off a boiler during a cold startup, the operator must first______ -
ANSWER-check for the correct water level
boiler should be warmed up slowly when starting up to ______ - ANSWER-allow
uniform expansion of drums and tubes
3
, combustion requires____ - ANSWER-fuel, oxygen, and Heat
the three most common fuels used in boilers are _____ - ANSWER-gas, fuel oil,
and Coal
incomplete combustion can be caused by ______ - ANSWER-insufficient air
after replacing a gauge glass but before placing it in service, it is necessary to
______ - ANSWER-crack open the steam valve in warm the gauge glass
two bottom blowdown valves are required on boilers operating at pressures
above______ psi - ANSWER-100
extra heavy steel pipe is required on a boiler bottom blowdown line when the
pressure is above ____ psi - ANSWER-125
package boilers are programmed to _____ - ANSWER-ignite the burner in low
fire
there are________ sq ft of heating surface in a water tube 3 1/2" in diameter and
20' long - ANSWER-18.32
to change 1 lb of water from and at212 °f into steam at atmospheric
pressure,______ btu are necessary - ANSWER-970.3
a surface condenser is one that______ - ANSWER-has circulating water flowing
through the tubes and exhaust steam around the outside of the tubes
4
