Power Engineering - 4A Practice Questions With Complete
Solutions
_____ are installed to prevent hot oil from spreading beyond the
confines of a hot oil heater in the event of a ruptured tube.
a. Dikes
b. Tunnels
c. Ditches
d. By-pass pipes Correct Answers a. Dikes
_____ are often used to aid the return of condensate through the
return piping of large complexes.
a. Boiler feed pumps
b. Vacuum injectors
c. Vacuum pumps
d. Vacuum breakers Correct Answers c. Vacuum pumps
__________ dampers have the blades linked so the adjacent
blades rotate in opposite directions.
a. Parallel blade
b. Bypass
c. Fire
d. Opposed blade Correct Answers d. Opposed blade
___________ dampers are controlled in such a way that they are
either fully open or fully closed.
a. Relief
,b. Return air
c. Backdraft
d. Two-position Correct Answers d. Two-position
___________ is used to expel air from the risers and main
headers of the steam heating system.
a. A deaerator
b. An air condenser
c. An air ejector
d. An automatic air vent Correct Answers d. An automatic air
vent
_______________ causes the fuel to ignite in a diesel engine.
a. A precisely timed glow plug.
b. The pressure of the injected fuel.
c. The high temperature compressed air in the engine cylinder.
d. The fuel injector nozzle. Correct Answers c. The high
temperature compressed air in the engine cylinder.
"Laying up" a boiler means:
a. Preparing the boiler for a period of storage
b. Setting the boiler on its foundation
c. Dismantling the boiler for annual overhaul
d. Preparing a boiler for start up Correct Answers a. Preparing
the boiler for a period of storage
"SOP" stands for
,a. Standard Operating Procedure
b. Simplified Operating Practices
c. Simplified Operating Procedure
d. Special Operating Procedure Correct Answers a. Standard
Operating Procedure
4B07-03-05-03 To prevent cooling tower basin water from
freezing during cold weather, many units:
a. have automatic ethylene glycol antifreeze injection systems.
b. have thermostatically controlled electric basin heaters.
c. have automatic gas-fired sump heaters .
d. use salt brine instead of water. Correct Answers b. have
thermostatically controlled electric basin heaters.
4B07-04-01-02 The combustion chamber of a gas turbine:
a. increases the density of the compressed air.
b. must be water cooled to protect against high temperature.
c. is where fuel is added to air, and burned.
d. preheats the combustion air before it is compressed. Correct
Answers c. is where fuel is added to air, and burned.
4B07-04-01-03 A two shaft gas turbine:
a. has the load turbine downstream from the compressor turbine
b. is always an open cycle
c. uses two shafts, geared together
d. is always regenerative Correct Answers a. has the load
turbine downstream from the compressor turbine
, 4B07-04-01-04 The output power of a gas turbine depends upon
a. the mass of hot gas passing through the turbine per unit time
b. the temperature at the turbine inlet in Kelvin
c. the drive gear ratio between the turbine and compressor
d. the difference between inlet air and turbine exhaust
temperature Correct Answers a. the mass of hot gas passing
through the turbine per unit time
4B07-04-01-05 A closed cycle gas turbine:
a. Does not need a combustion chamber
b. Is the most common type of gas turbine
c. Recycles the same working fluid
d. Burns fuel with spent exhaust gas. Correct Answers c.
Recycles the same working fluid
4B07-04-01-06 A gas turbine is most efficient when:
a. both turbine shafts run at the same speed
b. the combustion chamber is kept cool
c. the ambient air temperature is low
d. operated at the highest combustion temperature that the
construction materials permit. Correct Answers d. operated at
the highest combustion temperature that the construction
materials permit.
4B07-04-01-07 A simple gas turbine is one without reheaters or:
a. Starting motors
b. Compressors
Solutions
_____ are installed to prevent hot oil from spreading beyond the
confines of a hot oil heater in the event of a ruptured tube.
a. Dikes
b. Tunnels
c. Ditches
d. By-pass pipes Correct Answers a. Dikes
_____ are often used to aid the return of condensate through the
return piping of large complexes.
a. Boiler feed pumps
b. Vacuum injectors
c. Vacuum pumps
d. Vacuum breakers Correct Answers c. Vacuum pumps
__________ dampers have the blades linked so the adjacent
blades rotate in opposite directions.
a. Parallel blade
b. Bypass
c. Fire
d. Opposed blade Correct Answers d. Opposed blade
___________ dampers are controlled in such a way that they are
either fully open or fully closed.
a. Relief
,b. Return air
c. Backdraft
d. Two-position Correct Answers d. Two-position
___________ is used to expel air from the risers and main
headers of the steam heating system.
a. A deaerator
b. An air condenser
c. An air ejector
d. An automatic air vent Correct Answers d. An automatic air
vent
_______________ causes the fuel to ignite in a diesel engine.
a. A precisely timed glow plug.
b. The pressure of the injected fuel.
c. The high temperature compressed air in the engine cylinder.
d. The fuel injector nozzle. Correct Answers c. The high
temperature compressed air in the engine cylinder.
"Laying up" a boiler means:
a. Preparing the boiler for a period of storage
b. Setting the boiler on its foundation
c. Dismantling the boiler for annual overhaul
d. Preparing a boiler for start up Correct Answers a. Preparing
the boiler for a period of storage
"SOP" stands for
,a. Standard Operating Procedure
b. Simplified Operating Practices
c. Simplified Operating Procedure
d. Special Operating Procedure Correct Answers a. Standard
Operating Procedure
4B07-03-05-03 To prevent cooling tower basin water from
freezing during cold weather, many units:
a. have automatic ethylene glycol antifreeze injection systems.
b. have thermostatically controlled electric basin heaters.
c. have automatic gas-fired sump heaters .
d. use salt brine instead of water. Correct Answers b. have
thermostatically controlled electric basin heaters.
4B07-04-01-02 The combustion chamber of a gas turbine:
a. increases the density of the compressed air.
b. must be water cooled to protect against high temperature.
c. is where fuel is added to air, and burned.
d. preheats the combustion air before it is compressed. Correct
Answers c. is where fuel is added to air, and burned.
4B07-04-01-03 A two shaft gas turbine:
a. has the load turbine downstream from the compressor turbine
b. is always an open cycle
c. uses two shafts, geared together
d. is always regenerative Correct Answers a. has the load
turbine downstream from the compressor turbine
, 4B07-04-01-04 The output power of a gas turbine depends upon
a. the mass of hot gas passing through the turbine per unit time
b. the temperature at the turbine inlet in Kelvin
c. the drive gear ratio between the turbine and compressor
d. the difference between inlet air and turbine exhaust
temperature Correct Answers a. the mass of hot gas passing
through the turbine per unit time
4B07-04-01-05 A closed cycle gas turbine:
a. Does not need a combustion chamber
b. Is the most common type of gas turbine
c. Recycles the same working fluid
d. Burns fuel with spent exhaust gas. Correct Answers c.
Recycles the same working fluid
4B07-04-01-06 A gas turbine is most efficient when:
a. both turbine shafts run at the same speed
b. the combustion chamber is kept cool
c. the ambient air temperature is low
d. operated at the highest combustion temperature that the
construction materials permit. Correct Answers d. operated at
the highest combustion temperature that the construction
materials permit.
4B07-04-01-07 A simple gas turbine is one without reheaters or:
a. Starting motors
b. Compressors
