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Practice Questions - Section 3

Instructions:
The following questions are designed to give you the opportunity to practice for the EGSA Electrical
Generator Service Technician Certification exam and to determine areas where you may need study
and review.
Once you have taken the practice questions, you can check your answers using a separate document
from the ESGA Study Guide. This document contains explanations for most of the correct and in-
correct answers. Task links are also provided with each question. These links direct you to specific
category and task areas. From there, you can locate the text to use for reference on your specific area
of need.

Section 3 - Generators/Alternators

55. Which of the following is NOT a component of a brushless generator?

a. Exciter field
b. Slip rings
c. Rotating diodes
d. Main rotor

56. On a 2-pole generator, how many revolutions are required to produce one complete sine-wave?

a. 1 full revolution
b. 2 full revolutions
c. ½ revolution
d. 4 revolutions

57. Generated voltage is a function of what?

a. Stator configuration
b. Prime mover RPM
c. Magnetic strength of the main rotor
d. Diode polarity

58. 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 rotating diodes

59. 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

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