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EGSA Set 03 - Generators-Alternators Exam Latest Update
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EGSA Set 03 -Generators-Alternators Exam
Latest Update
Which of the following is NOT a component of a brushless generator?
a) exciter field
b) slip rings
c) rotating diodes
d) main rotor - Answer b) slip rings
On a two-pole generator, how many revolutions are required to produce one complete
sine-wave?
a) 1 full revolution
b) 2 full revolutions
c) 1/2 revolution
d) 4 revolutions - Answer a) 1 full revolution
Generated voltage is a function of what?
a) stator configuration
b) Prime Mover RPM
c) Magnetic strength of the main rotor
d) Diode polarity - Answer c) Magnetic strength of the main rotor
The frequency output of a generator is determined by:
a) Prime mover RPM
b) The external load
c) Magnetic strength of the main rotor
d) Rectification of the main diodes - Answer a) Prime mover RPM
, The exciter rotor produces which type of output?
a) Direct Current (DC)
b) Alternating Current (AC)
c) Pulsating DC (unfiltered, rectified AC)
d) VARs to correct power factor. - Answer b) Alternating Current (AC)
Generators rated for Standby usage are designed to operate under which of the
following conditions?
a) only when needed, not at full load capacity for more than a few seconds (start a
motor)
b) at or below 90% of the generators full load rating.
c) Only when needed, limited hours at full load.
d) Unlimited hours at generators full load setting. - Answer c) Only when needed, limited
hours at full load.
Continuous rated generators would be found on which of the following applications?
a) a hospitals backup system
b) a remote science stations primary power
c) Urban home use
d) only where there were never great deviations in load. - Answer b) a remote science
stations primary power
What is the difference in inductive type generators and synchronous type generators?
a) Inductive has the ability to compensate for power factor.
b) Synchronous has the ability to produce a controlled voltage.
c) Inductive requires a slow prime mover such as hydro turbines and synchronous
requires high speed steam turbines.
d) There is no real difference. - Answer b) Synchronous has the ability to produce a
controlled voltage.
When rating a three phase generator, the manufacturer includes the following
information: KW, amps, volts, PF, and _____. What is missing?
a) KVAR
b)KVA
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