Main Generation

Question 1

Which of the following automatic generator excitation limits will be fixed by raising generator field current?
A.  Fixed field
B.  Volts/Hz
C.  MEL
D.  URAL

Answer 1

D

Question 2

The \_\_\_\_\_\_ is designed to prevent generator damage from excessive core end heating.
A.  URAL
B.  Volts/Hz trip
C.  MEL
D.  PSS

Answer 2

A

Question 3

The DC regulator controls generator…
A. field current by altering the AC voltage from the rectifiers.
B. field current by altering the DC voltage from the rectifiers.
C. terminal voltage by altering the AC voltage from the rectifiers.
D. terminal voltage by altering the DC voltage from the rectifiers.

Answer 3

B

Question 4

When the generator is tripped, the SCRs in the field rectifiers are ___(1)___. The field shorting breaker ___(2)___.
A. (1) given a continuous gating signal; (2) opens
B. (1) given a continuous gating signal; (2) closes
C. (1) given no gating signals; (2) opens
D. (1) given no gating signals; (2) closes

Answer 4

B

Question 5

Which trip is available to trip the main generator when the regulator is in the DC mode of operation?
A.  URAL
B.  Volts/Hz
C.  MINEX
D.  PSS

Answer 5

B

Question 6

Generator field flashing is provided by:
A.  Non-class 480 VAC (NH)
B.  Non-class 120 VAC (NN)
C.  Non-class 125 VDC (NK)
D.  Permanent Magnet Generator

Answer 6

A

Question 7

Which of the following conditions is NOT required for a main generator coast down trip?
A.  Main generator connected to the grid
B.  Main generator reverse power
C.  Main generator simultaneous trip
D.  Reactor trip

Answer 7

C

Question 8

The main generator differential trip relay, when actuated, will directly trip the...
A.  Reactor
B.  Reactor Coolant Pumps
C.  Stator Cooling Water Pumps
D.  Normal Service Transformers

Answer 8

C

Question 9

Oil circulates through the main transformers due to ___(1)___. The first set of fans will energize when ___(2)___.
A. (1) natural circulation; (2) the generator excitation is applied
B. (1) natural circulation; (2) oil temperature exceeds 70C
C. (1) forced circulation; (2) the generator excitation is applied
D. (1) forced circulation; (2) oil temperature exceeds 70C

Answer 9

C