Maryland boiler license Exam Questions and Answers
All Correct
all steam boilers must have - Answer-1 or more safety valves
/.before anyone enters the boiler drum, the main steam stop valve, bottom blowdown
valves, & feedwater valves should be - Answer-Locked closed
/.at atmospheric pressure, water begins to boil at approximately - Answer-212 degrees
F
/.fuels most commonly used in boilers - Answer-Fuel oil, gas, & coal
/.must be connected to the highest part of the steam side of the boiler - Answer-Steam
pressure gauge
/.with an NOWL in a boiler, the gauge glass is approximately - Answer-Half full
/.a high surface tension on top of the boiler water can lead to - Answer-Foaming
/.Bottom blowdown on a boiler removes sludge & sediment from the - Answer-Mud
drum
/.a boiler fusible plug is brass or bronze with a core of - Answer-Tin
/.a steam pressure gauge is calibrated in - Answer-Pounds per square inch
/.a secondary means of determining boiler water level - Answer-Try cocks
/.fires caused by spontaneous combustion are most likely to occur in the - Answer-Oily
waste rag storage
/.a siphon installed between the boiler & the pressure gauge protects the Bourdon tube
from - Answer-Steam
/.boiler feedwater is chemically treated to - Answer-Prevent formation of scale
/.in a firetube boiler, soot accumulates on the - Answer-Inside tube surface
/.the pressure applied on the boiler during a hydrostatic test should be - Answer-1.5
times the MAWP
/.as fuel oil is heated, its viscosity is - Answer-Decreased
, /.the induced draft fan is located between the boiler & the - Answer-Chimney
/.the flash point of fuel oil is the minimum temperature at which the fuel will - Answer-
Flash when exposed to an open flame
/.the fire point of fuel oil is the minimum temperature at which the fuel will - Answer-Burn
continually
/.the pour point of fuel oil is the ____ temperature at which fuel oil will ____ - Answer-
Lowest; flow
/.fuel oil with a low flash point is - Answer-Dangerous to handle
/.the operating range of a steam boiler is controlled by a - Answer-Pressure control
/.water hammer in steam lines is caused by - Answer-Condensate in the line
/.measures the difference in pressure between 2 points, measures draft - Answer-
Manometer
/.the best time to blowdown a boiler is when it is at its - Answer-Lowest load
/.Boilers that are laid up dry have trays of ____ put in the steam & water drums to
absorb moisture - Answer-Silica gel
/.required to obtain complete combustion of a fuel - Answer-Mixture; atomization;
temperature; time
/.oxygen in the boiler causes - Answer-Pitting
/.when the boiler low water alarm is ringing, the operator should - Answer-Secure the
fires & feedwater
/.a furnace explosion can be prevented by - Answer-Purging the furnace after ignition
failure
/.a lead sulfide cell which is used for flame detection is sensitive to - Answer-Infrared
light
/.a pop safety valve is - Answer-Spring loaded
/.to test a low water fuel cutoff using an evaporation test, the boiler operator must -
Answer-Secure feedwater going to the boiler
/.hazard signal system provides container label information about hazardous material -
Answer-NFPA
All Correct
all steam boilers must have - Answer-1 or more safety valves
/.before anyone enters the boiler drum, the main steam stop valve, bottom blowdown
valves, & feedwater valves should be - Answer-Locked closed
/.at atmospheric pressure, water begins to boil at approximately - Answer-212 degrees
F
/.fuels most commonly used in boilers - Answer-Fuel oil, gas, & coal
/.must be connected to the highest part of the steam side of the boiler - Answer-Steam
pressure gauge
/.with an NOWL in a boiler, the gauge glass is approximately - Answer-Half full
/.a high surface tension on top of the boiler water can lead to - Answer-Foaming
/.Bottom blowdown on a boiler removes sludge & sediment from the - Answer-Mud
drum
/.a boiler fusible plug is brass or bronze with a core of - Answer-Tin
/.a steam pressure gauge is calibrated in - Answer-Pounds per square inch
/.a secondary means of determining boiler water level - Answer-Try cocks
/.fires caused by spontaneous combustion are most likely to occur in the - Answer-Oily
waste rag storage
/.a siphon installed between the boiler & the pressure gauge protects the Bourdon tube
from - Answer-Steam
/.boiler feedwater is chemically treated to - Answer-Prevent formation of scale
/.in a firetube boiler, soot accumulates on the - Answer-Inside tube surface
/.the pressure applied on the boiler during a hydrostatic test should be - Answer-1.5
times the MAWP
/.as fuel oil is heated, its viscosity is - Answer-Decreased
, /.the induced draft fan is located between the boiler & the - Answer-Chimney
/.the flash point of fuel oil is the minimum temperature at which the fuel will - Answer-
Flash when exposed to an open flame
/.the fire point of fuel oil is the minimum temperature at which the fuel will - Answer-Burn
continually
/.the pour point of fuel oil is the ____ temperature at which fuel oil will ____ - Answer-
Lowest; flow
/.fuel oil with a low flash point is - Answer-Dangerous to handle
/.the operating range of a steam boiler is controlled by a - Answer-Pressure control
/.water hammer in steam lines is caused by - Answer-Condensate in the line
/.measures the difference in pressure between 2 points, measures draft - Answer-
Manometer
/.the best time to blowdown a boiler is when it is at its - Answer-Lowest load
/.Boilers that are laid up dry have trays of ____ put in the steam & water drums to
absorb moisture - Answer-Silica gel
/.required to obtain complete combustion of a fuel - Answer-Mixture; atomization;
temperature; time
/.oxygen in the boiler causes - Answer-Pitting
/.when the boiler low water alarm is ringing, the operator should - Answer-Secure the
fires & feedwater
/.a furnace explosion can be prevented by - Answer-Purging the furnace after ignition
failure
/.a lead sulfide cell which is used for flame detection is sensitive to - Answer-Infrared
light
/.a pop safety valve is - Answer-Spring loaded
/.to test a low water fuel cutoff using an evaporation test, the boiler operator must -
Answer-Secure feedwater going to the boiler
/.hazard signal system provides container label information about hazardous material -
Answer-NFPA
