Phep Hydraulic turbine governors

Question 1

A hydraulic turbine governor must maintain a balance between the

amperes and desired voltage
Water input to turbines and the power requirements on the system
Power requirements on the system and the power factor
Water input to the turbines and the desired exit velocity

Answer 1

Water input to turbines and the power requirements on the system

Question 2

Governor settings and responses must take into consideration

Allowable loading of transmission lines and maximum loading of the lines between systems
Hydraulic characteristics of the penstock and turbine
The flywheel effect of the rotating mass of the generator and turbine
All of the above

Answer 2

All of the above


Question 3

The compensating dashpot is inserted in the:

Restoring mechanism linkage
Speed adjustment linkage
Speed droop linkage
None of the above

Answer 3

Restoring mechanism linkage

Question 4

Any change in the position of the flyballs is transmitted to the pilot valve by the:

Pilot valve plunger
Speeder spring
Pilot valve bushing
Speeder Rod

Answer 4

Speeder Rod


Question 5

The compensating dashpot serves to prevent over travel or hunting of the gates by re-centering the

Flyballs
Speeder Rod
Servo motor
Pilot valve

Answer 5

Pilot valve

Question 6

The rate at which the smaller plunger of the compensating dashpot returns to normal is usually determined by the setting of the

Needle valve
Speed adjustment
Speed droop
All three of the above

Answer 6

Needle valve

Question 7

The adjustment provided in the speed adjusting linkage to cause the governor to add speed adjustment in the lower direction as the gates open wider is called the

Speed droop adjustment
Gate positioning restoring adjustment
Gates limit adjustment
Over speed device

Answer 7

Speed droop adjustment

Question 8

The governors of the units designated to regulate system frequency will generally have speed droop settings closer to.

15%
10%
25%
0%


Answer 8

0%

Question 9

An isochronous governor is one that has

Maximum speed Droop
Zero speed droop
Minimum speed droop
No means of controlling frequency

Answer 9

Zero speed droop

Question 10

Governor safety devices usually serve to:

Close the gates if turbine speed exceeds a predetermined value
Close the gates if governor oil pressure is lost
Control or prevent water hammer damage by opening auxiliary nozzles if the main nozzle closes too rapidly
Any or all of the above

Answer 10

Any or all of the above