Stationary Engineering Exam Questions
With 100% Pass
/. What is the pressure at the base of a vertical foot of water? - Answer-0.433 psi
/.How much should the boiler pressure increase when performing a hydrostatic test? -
Answer-1.5 times the safety valve setting
/.The range of a boiler steam pressure gauge. - Answer-1.5 to 2 times the safety valve
setting
/.Fuel oil heaters must be used when burning what? - Answer-No. 6 fuel oil
/.What is the maximum allowable working pressure of a low pressure steam boiler?
(MAWP) - Answer-Up to 15 psi
/.A boiler generating 20,000 lbs of steam/hr must be supplied with at least how many
pounds of water/hr? - Answer-20,000 lbs
/.Where do the heat and gases of combustion pass in a water tube boiler? - Answer-
Around the tubes
/.The frequency of blowing down a steam boiler is best ascertained by? - Answer-Daily
testing of the water boiler
/.What is an economizer used for in large boiler plants? - Answer-To heat the feedwater
using gases of combustion
/.What kind of boiler is a horizontal return tubular? - Answer-A fire tube boiler
/.The part of a boiler that has heat and gases of combustion on one side and water on
the other. - Answer-Heating Surface
/.The amount of draft available in a natural draft system is dependent on what? -
Answer-The height of the chimney
/.What must the boiler steam pressure gauge be connected to? - Answer-The highest
part of the steam side of the boiler
/.What is an indication of a dirty fuel oil strainer? - Answer-A large pressure drop across
the strainer
, /.What causes a scale buildup on the water side of the steam boiler? - Answer-Improper
water boiler treatment
/.What are the types of boilers? - Answer-Fire Tube
Water Tube
Cast-Iron Sectional
/.How often should the water column and gauge glass be blown down? - Answer-Once
a shift
/.How many pounds of water are necessary to produce 1 pound of steam? - Answer-1 lb
of water
/.What is the sequence of operation with a quick-opening valve, when blowing down a
boiler equipped with both a quick-opening valve and a screw type valve? - Answer-The
quick-opening valve is opened first and closed last
/.How is a steam pressure gauge calibrated? - Answer-In pounds per square inch
/.What is the purpose of a water column? - Answer-To reduce turbulence in the gauge
glass to get a more accurate reading of the water level
/.Why should soot be removed from the boiler tubes? - Answer-For better heat transfer
/.What is the most important fitting on a boiler? - Answer-The safety valve
/.Who is in charge of doing the repairs on a safety valve? - Answer-The manufacture or
manufacturer's authorized representative.
/.The deposits of calcium and magnesium carbonates on the boiler heating surface can
cause what? - Answer-Scaling
/.What is a direct cause of overheating boiler tubes? - Answer-Scale formation on the
tubes
/.What are try cocks? - Answer-A secondary means of determining water level in a
boiler
/.When is a high suction line on a fuel oil tank used? - Answer-When signs of sludge
and water are evident in the tank
/.What is protecting the boiler steam pressure gauge from high temperatures? - Answer-
The siphon
/.How are superheaters being prevented from overheating? - Answer-Steam circulation
With 100% Pass
/. What is the pressure at the base of a vertical foot of water? - Answer-0.433 psi
/.How much should the boiler pressure increase when performing a hydrostatic test? -
Answer-1.5 times the safety valve setting
/.The range of a boiler steam pressure gauge. - Answer-1.5 to 2 times the safety valve
setting
/.Fuel oil heaters must be used when burning what? - Answer-No. 6 fuel oil
/.What is the maximum allowable working pressure of a low pressure steam boiler?
(MAWP) - Answer-Up to 15 psi
/.A boiler generating 20,000 lbs of steam/hr must be supplied with at least how many
pounds of water/hr? - Answer-20,000 lbs
/.Where do the heat and gases of combustion pass in a water tube boiler? - Answer-
Around the tubes
/.The frequency of blowing down a steam boiler is best ascertained by? - Answer-Daily
testing of the water boiler
/.What is an economizer used for in large boiler plants? - Answer-To heat the feedwater
using gases of combustion
/.What kind of boiler is a horizontal return tubular? - Answer-A fire tube boiler
/.The part of a boiler that has heat and gases of combustion on one side and water on
the other. - Answer-Heating Surface
/.The amount of draft available in a natural draft system is dependent on what? -
Answer-The height of the chimney
/.What must the boiler steam pressure gauge be connected to? - Answer-The highest
part of the steam side of the boiler
/.What is an indication of a dirty fuel oil strainer? - Answer-A large pressure drop across
the strainer
, /.What causes a scale buildup on the water side of the steam boiler? - Answer-Improper
water boiler treatment
/.What are the types of boilers? - Answer-Fire Tube
Water Tube
Cast-Iron Sectional
/.How often should the water column and gauge glass be blown down? - Answer-Once
a shift
/.How many pounds of water are necessary to produce 1 pound of steam? - Answer-1 lb
of water
/.What is the sequence of operation with a quick-opening valve, when blowing down a
boiler equipped with both a quick-opening valve and a screw type valve? - Answer-The
quick-opening valve is opened first and closed last
/.How is a steam pressure gauge calibrated? - Answer-In pounds per square inch
/.What is the purpose of a water column? - Answer-To reduce turbulence in the gauge
glass to get a more accurate reading of the water level
/.Why should soot be removed from the boiler tubes? - Answer-For better heat transfer
/.What is the most important fitting on a boiler? - Answer-The safety valve
/.Who is in charge of doing the repairs on a safety valve? - Answer-The manufacture or
manufacturer's authorized representative.
/.The deposits of calcium and magnesium carbonates on the boiler heating surface can
cause what? - Answer-Scaling
/.What is a direct cause of overheating boiler tubes? - Answer-Scale formation on the
tubes
/.What are try cocks? - Answer-A secondary means of determining water level in a
boiler
/.When is a high suction line on a fuel oil tank used? - Answer-When signs of sludge
and water are evident in the tank
/.What is protecting the boiler steam pressure gauge from high temperatures? - Answer-
The siphon
/.How are superheaters being prevented from overheating? - Answer-Steam circulation
