SUP_20 Flashcards
The principle operation of the fly ball is to maintain constant speed or load on a unit.
a) true
b) false
a) true ref: section 1, pg. 1
At what speed does the governor allow the brakes to be applies on a generator?
a) from 10% speed to less than 10%
b) from 50% speed to less than 50%
c) from 15% speed to less than 10%
d) from 5% speed to less than 1%
What is the purpose of the speed drop mechanism on an Allis-Chambers unit?
a) to decrease efficiency
b) to decrease to load on the the electrical grid
c) to divide the load between the generators in the desired proportions
d) to divide the load to only the largest generators
c) divide the load between the generators in the desired proportions ref: section 2, pg. 2-3
What is the principal part of the Kaplan control mechanism? a) Pilot operated valve b) Solenoid valve c) Solenoid valve with integral check valve d) Regulating valve with valve actuator and pilot valve
d) Regulating valve with valve actuator and pilot valve ref: section 2, pg. 43
What is the permanent generator designed to give?
a) long service with a minimum amount of attention
b) designed to give nothing but problems
c) designed to be sacrificial and replaced a lot
d) high amounts of electricity at low milliamps
a) long service with a minimum amount of attraction ref: section 2, pg. 49
What is the normal open circuit voltage of the permanent Magnet Generator on a Pelton Governor?
240 volts at 600 RPM, 160 volts at 400 RPM ref: section 4, pg. 33
When should the vibrators on a Woodward Governor be replaced?
a) the rotation of the governor head does not keep the fly ball rod moving with a minute up and down motion. b) It appears that the high points are wearing off the vibrators. c) The ball race track begin to pit. ref: section 4, pg. 33
What is the purpose of the Dashpot on an Allis-Chalmers Governor?
To prevent the fly ball from over-correcting. Ref: section 2, pg. 2
