3ST CLASS STATIONARY ENGINEERS EXAMINATION
(False questions omitted)
/. Why is boiler water deaerated?
A) Remove dissolvable gases
B) Preheat feedwater
C) Both - Answer-Both
/.A three phase squirrel cage induction motor could run hot due to all except?
A) A grounded station
B) A shortened station
C) A high power factor - Answer-High power factor
/.The switch in the windowbox that verifies combustion air when entering the furance is
the?
A) Combustion Air damper switch
B) High Limit Switch
C)Air flow proving switch - Answer-Combustion Air damper switch
/.Whats does a flame safegaurd system prevent?
A) Tube Failures
B) Combustion Explosions
C) Boiler control failures - Answer-Combustion explosions
/.What is the functin of the saftey valve blowback ring?
A) Prevent saftey valve from leaking
B) Prevent Simmering
C) Increase or decrease amount of blowdown - Answer-Increase or decrease amount of
blowdown
/.What would cause a tube in a scotch marine boiler to burst?
A) Low water condition
B) Corrosion of the tube
C) Tubes are under external pressure, may collape but not burst - Answer-Tubes are
under external pressure, may collape but not burst
/.What is priming?
A) Generating steam bubbles in steam space
B) Carryover of the tube
C) Carryover of water - Answer-Carryover of water
/.What condition is more injurious to a boiler?
A) Overpreesure
, B) Overheat
C) Both - Answer-Both?
/.In a single boiler plant, what pressure should the non-return valve be opened
A) 25 psi
B) 50 psi
C) Prior to lighting off - Answer-Prior to light off?
/.Sporadic Excessive vibration in steam turbine likely caused by
A) Boiler carryover
B) Turbine shaft misalignment
C) Worn thrust bearing - Answer-Boiler carryover
/.Primary advantages of using fluidized bed boilers
A) Use of low heat value fuel
B) Air emissions
C) Both A + B - Answer-Both A+ B
/.Why does scale reduce efficiency of boiler?
A) Scale provides insulation barrier to flow of heat - Answer-Scale provides insulation
barrier to flow of heat
/.What causes heavy black smokewhen fuel oil is burned?
A) Insufficient air
B) Insufficient fuel
C) Excess air - Answer-Insufficient air
/.What is the purpose of a scanner or fire eye?
A) To verify pilot of main flame - Answer-To verify pilot of main flame
/.How many means of feeding water are required on wood fired boiler with more than
500 square feet of heating surface?
A) 1
B) 2
C) 3 - Answer-2
/.What boiler attachment is used to heat steam above the temp of the water from which
it is evaporated?
A) Economizer
B) Superheater
C) Evaporator - Answer-Superheater
/.The function of the diffuser ring in a turbine-type centrifual feed pump is to
A) Convert high pressure to velocity
B) Convert hgih velocity to pressure
C) Balace high radial thrust - Answer-Convert high velocity to pressure
(False questions omitted)
/. Why is boiler water deaerated?
A) Remove dissolvable gases
B) Preheat feedwater
C) Both - Answer-Both
/.A three phase squirrel cage induction motor could run hot due to all except?
A) A grounded station
B) A shortened station
C) A high power factor - Answer-High power factor
/.The switch in the windowbox that verifies combustion air when entering the furance is
the?
A) Combustion Air damper switch
B) High Limit Switch
C)Air flow proving switch - Answer-Combustion Air damper switch
/.Whats does a flame safegaurd system prevent?
A) Tube Failures
B) Combustion Explosions
C) Boiler control failures - Answer-Combustion explosions
/.What is the functin of the saftey valve blowback ring?
A) Prevent saftey valve from leaking
B) Prevent Simmering
C) Increase or decrease amount of blowdown - Answer-Increase or decrease amount of
blowdown
/.What would cause a tube in a scotch marine boiler to burst?
A) Low water condition
B) Corrosion of the tube
C) Tubes are under external pressure, may collape but not burst - Answer-Tubes are
under external pressure, may collape but not burst
/.What is priming?
A) Generating steam bubbles in steam space
B) Carryover of the tube
C) Carryover of water - Answer-Carryover of water
/.What condition is more injurious to a boiler?
A) Overpreesure
, B) Overheat
C) Both - Answer-Both?
/.In a single boiler plant, what pressure should the non-return valve be opened
A) 25 psi
B) 50 psi
C) Prior to lighting off - Answer-Prior to light off?
/.Sporadic Excessive vibration in steam turbine likely caused by
A) Boiler carryover
B) Turbine shaft misalignment
C) Worn thrust bearing - Answer-Boiler carryover
/.Primary advantages of using fluidized bed boilers
A) Use of low heat value fuel
B) Air emissions
C) Both A + B - Answer-Both A+ B
/.Why does scale reduce efficiency of boiler?
A) Scale provides insulation barrier to flow of heat - Answer-Scale provides insulation
barrier to flow of heat
/.What causes heavy black smokewhen fuel oil is burned?
A) Insufficient air
B) Insufficient fuel
C) Excess air - Answer-Insufficient air
/.What is the purpose of a scanner or fire eye?
A) To verify pilot of main flame - Answer-To verify pilot of main flame
/.How many means of feeding water are required on wood fired boiler with more than
500 square feet of heating surface?
A) 1
B) 2
C) 3 - Answer-2
/.What boiler attachment is used to heat steam above the temp of the water from which
it is evaporated?
A) Economizer
B) Superheater
C) Evaporator - Answer-Superheater
/.The function of the diffuser ring in a turbine-type centrifual feed pump is to
A) Convert high pressure to velocity
B) Convert hgih velocity to pressure
C) Balace high radial thrust - Answer-Convert high velocity to pressure
