Page 56 - Apprentice Manual_Neat

144. System configuration: Three phase application with ground fault relay, the neutral is bonded to
ground at the generator. Which type of switch is best suited for this situation?

a. 2-pole
b. 3-pole
c. 4-pole
d. 5-pole

145. All automatic transfer switches utilize which of the following basic functions?

a. Utility sensing, time delay to start generator, generator voltage sensing, return to normal
timer, and cool down timer
b. Start contacts to generator, time delay to start generator, cool down timer, voltage regulator
c. Utility sensing, time delay to start generator, voltage regulator, cool down timer,
manual override to normal
d. Time delay to emergency source, engine off at return to normal timer, voltage regulator,
utility sensing

146. A Bypass Isolation/Closed Transition transfer switch is most often used on which type of load?

a. Non-critical
b. Critical
c. Remote locations
d. Only three phase

147. How many sources does a typical transfer switch have to select from?

a. Two
b. Three
c. More than three
d. As many as required by local code

148. The source from which a transfer switch draws its operating power is:

a. The source it is currently connected to
b. The generator
c. The utility
d. A battery

149. If the phase rotation of the utility does not match the phase rotation of the generator, what will
likely be the outcome?

a. No difference in operation of any equipment
b. Motors will run in reverse
c. Electric clocks will run backwards
d. Generators will have to be run in reverse

EGSA Apprentice Certification Program Study Guide - Page 48