Page 57 - Apprentice Manual_Neat

150. It is not always practical to take a facility offline (remove from utility power) to perform routine
tests of a system. What method may be employed to eliminate power interruption?

a. Use the transfer switch Load Test Switch
b. Open the building utility main breaker
c. Open the dedicated breaker for the transfer switch
d. Manually close the breaker for the transfer switch

151. Changing the Main and/or Arching contacts should be done:

a. During normal routine maintenance
b. When the system is offline specifically for that purpose
c. When the system is energized and online
d. During a utility outage

152. Which item(s) could be used to compare the source rotation to the alternate source rotation?

a. Three phase motor or rotation meter
b. VOM or amp clamp
c. Frequency meter
d. PF meter with an amp clamp

153. Which statement is true regarding routine maintenance?

a. All sources of power must be de-energized
b. Only the utility source of power must be de-energized
c. Always use the “one hand rule” when working on energized equipment
d. Always use brass tool so as not to be attracted to any magnetic contactors

154. The bypass isolation switch is used for what purpose?

a. To test the load carrying capabilities of the contacts
b. To test the automatic function without transferring the actual load
c. To test for arcing when the load is switched from one source to another
d. To isolate any potential ground faults on the secondary source

155. Automatic Transfer Switch maintenance must be done to:

a. Reduce fuel consumption
b. Completely eliminate failures from occurring
c. Improve the integrity of the emergency system
d. Enable the generator to run

156. When verifying voltage sensor calibration, you need which of the following pieces of equipment
as a minimum?

a. Amp-clamp and volt meter
b. An analog volt meter and digital volt meter
c. Variable voltage source and a voltmeter
d. Fixed voltage source and a timer

Page 49 - EGSA Apprentice Certification Program Study Guide