Power Engineering 3B2 - Chapter 2|
2026 Update
If left at a standstill, while the turbine is still hot, the lower half of the rotor will
cool off faster than the upper half and the rotor will
______________________ or "hog".
a. turn on it's own
b. bend upwards
c. twist
d. bend downwards
e. stall - Ans--B
A barring gear consists of an electric motor and several sets of reducing
gears to turn the turbine shaft at a low speed. It is used:
1) After stopping a hot turbine to prevent "hogging"
2) Only on small turbine
3) Continually when the turbine is not operating
4) Prior to start-up for approximately 3 hours
a. 1, 2, 4
b. 1, 2, 3
c. 1, 4
d. 2, 3
e. 2, 4 - Ans--C
A jacking oil pump is used to:
1) Make slight adjustments to the turbine bearing housings during overhaul
to maintain alignment
2) Supply oil to a hydraulic motor for the turning gear
3) Supply oil to the bearings under the shaft at all times so lubrication is
assured
, 4) Supply a high volume of oil at high pressure
a. 1, 2, 3
b. 2, 3, 4
c. 1, 3, 4
d. 1, 2, 3, 4
e. None of the above - Ans--E - It supplies oil under the bearings but not "at all
times." Only before startup. It is shut off when the speed is above 50-60 rpm
In a nuclear power station a _____________ supplies heat through a
_________ to the working fluid in place of a steam plant boiler.
1) reactor
2) heat exchanger
3) burner
4) pump
a. 1, 2
b. 1, 3
c. 3, 2
d. 1, 4
e. 2, 4 - Ans--A
In a nuclear power plant circulating coolant picks up heat in the reactor and
rejects it to the _______________ in the steam cycle by means of a heat
exchanger.
a. hotwell
b. condenser
c. working fluid
d. turbine
e. feed pump - Ans--C
With _________ a series of nozzle valves opens in sequence as the load
increases. This type of governing is most efficient and is used for impulse
turbines.
a. throttle governing
2026 Update
If left at a standstill, while the turbine is still hot, the lower half of the rotor will
cool off faster than the upper half and the rotor will
______________________ or "hog".
a. turn on it's own
b. bend upwards
c. twist
d. bend downwards
e. stall - Ans--B
A barring gear consists of an electric motor and several sets of reducing
gears to turn the turbine shaft at a low speed. It is used:
1) After stopping a hot turbine to prevent "hogging"
2) Only on small turbine
3) Continually when the turbine is not operating
4) Prior to start-up for approximately 3 hours
a. 1, 2, 4
b. 1, 2, 3
c. 1, 4
d. 2, 3
e. 2, 4 - Ans--C
A jacking oil pump is used to:
1) Make slight adjustments to the turbine bearing housings during overhaul
to maintain alignment
2) Supply oil to a hydraulic motor for the turning gear
3) Supply oil to the bearings under the shaft at all times so lubrication is
assured
, 4) Supply a high volume of oil at high pressure
a. 1, 2, 3
b. 2, 3, 4
c. 1, 3, 4
d. 1, 2, 3, 4
e. None of the above - Ans--E - It supplies oil under the bearings but not "at all
times." Only before startup. It is shut off when the speed is above 50-60 rpm
In a nuclear power station a _____________ supplies heat through a
_________ to the working fluid in place of a steam plant boiler.
1) reactor
2) heat exchanger
3) burner
4) pump
a. 1, 2
b. 1, 3
c. 3, 2
d. 1, 4
e. 2, 4 - Ans--A
In a nuclear power plant circulating coolant picks up heat in the reactor and
rejects it to the _______________ in the steam cycle by means of a heat
exchanger.
a. hotwell
b. condenser
c. working fluid
d. turbine
e. feed pump - Ans--C
With _________ a series of nozzle valves opens in sequence as the load
increases. This type of governing is most efficient and is used for impulse
turbines.
a. throttle governing
