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S6-Q156.) When verifying voltage sensor calibration, you need which of the following pieces of equipment as a
minimum?

a.) Amp-clamp and volt meter
Current is not under test in this situation.
b.) An analog volt meter and digital volt meter
Either may be used, but having both is not necessary.
c.) *Variable voltage source and a voltmeter
Correct. In order to see when the voltage sensor detects a change in voltage, a variable source is
required.
d.) Fixed voltage source and a timer
This answer has no method of measuring the voltage or varying the level at which the sensor reacts.

S6-Q157.) If smoke is observed coming from the transfer switch enclosure, you should immediately:

a.) Run
This will not solve the problem.
b.) Have a fire extinguisher armed and ready before opening the door
A good idea, but the source of the smoke must be neutralized first. Opening the door to an energized
smoke filled cabinet could be hazardous.
c.) *De-energize the switch so the enclosure can be opened safely
Correct. Neutralize the source of the smoke (the electricity) and then open the enclosure.
d.) Notify management so they can disarm smoke alarms or warn employees that there is no danger
Disarming smoke alarms is illegal in a public building.

Section 7: Voltage Regulators

S7-Q158.) A generator’s voltage level is determined by what part of the generator

a.) Engine governor
The governor determines KW produced.
b.) Output power of the prime mover
This is also a factor in KW produced as it is determined by the governor.
c.) *Voltage regulator
Correct. The voltage regulator senses and maintains the desired level of voltage.
d.) Number of KW the generator is rated for
The rating only reveals what level the voltage regulator is set to operate.

S7-Q159.) The basic inputs and outputs of a voltage regulator include: Power input, voltage sensing, and Droop
CT. What are the two remaining inputs or outputs?

a.) Current control, exciter output
Current is determined by the load and protective devices.
b.) *Exciter output, remote adjust
Correct. The exciter is what produces flux which determines the voltage level and voltage
adjustment may be necessary at the load, so a remote adjust is required.
c.) Diode control, remote sensing
Diodes are either on or off, there is no control. Having a control would make it an
SCR not a diode.
d.) Diode control, exciter output
Diodes are either on or off, there is no control. Having a control would make it an SCR not a diode.

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