Chapter 2

Question 1

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) Overload governing
B) By-pass governing
C) Throttle governing
D) Speed governing
E) Nozzle governing

Answer 1

E

Question 2

In a nuclear power station, a __________ supplies heat through a __________ to the working fluid in place of a steam plant boiler.

A) Reactor, burner
B) Burner, heat exchanger
C) Heat exchanger, pump
D) Reactor, pump
E) Reactor, heat exchanger

Answer 2

E

Question 3

Overload governing is used on ____________ turbines.

A) Impulse
B) Low pressure
C) Impulse and reaction
D) Small
E) Reaction

Answer 3

C

Question 4

The jacking oil pump supplies lubricating oil to the:

A) Bottom of the bearings
B) Thrust bearing
C) Side of the bearing
D) Center of the shaft
E) Top of the bearing

Answer 4

A

Question 5

When starting up a turbine, opening the trap bypass is not necessary as the traps will remove condensate as the condensate is produced.
A) True
B) False

Answer 5

B

Question 6

In an overspeed trip, the tripping bolt is held inside the shaft during normal operation by:

A) Hydraulic pressure
B) High pressure steam
C) A solenoid valve
D) A spring
E) Centrifugal force

Answer 6

D

Question 7

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

Answer 7

E

Question 8

Back-pressure and extraction turbines use ____________ in connection with ____________.

A) By-pass governors, pressure sensitive governors
B) Pressure sensitive governors, throttle governors
C) Throttle governors, speed sensitive governors
D) Pressure sensitive governors, speed sensitive governors
E) Speed sensitive governors, by-pass governors

Answer 8

D

Question 9

The extraction (condensate) pump is put into operation ____________ the ____________.

A) After, condenser circulating water pump
B) Before, jack oil pump
C) After, air ejector
D) Before, condenser circulating water pump
E) Before, air ejector

Answer 9

E

Question 10

In ____________, the spring loaded tripping bolt has a center of gravity slightly off the center of the shaft.

A) An electric turning gear
B) An overspeed trip
C) A barring gear
D)A shear pin coupling
E) A nozzle

Answer 10

B