PHEP Governors

Question 1

A hydraulic turbine governor must maintain a balance between the

Answer 1

water input the turbines and the power requirements on the system

Question 2

Governor settings and responses must take into consideration

Answer 2

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 has of the generator and turbine
All of the above

Question 3

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

Answer 3

speeder rod

Question 4

The compensating dashpot is inserted in the

Answer 4

restoring mechanism linkage

Question 5

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

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

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

Answer 7

speed droop adjustment

Question 8

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

Answer 8

0%

Question 9

An isochronous governor is one that has

Answer 9

zero speed droop

Question 10

Governor safety devices usually serve to

Answer 10

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