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What follows is a plain HTML version of the Quiz.
All of the questions and answers in this quiz are found in Tom Henry's book, "Troubleshooting Electrical Circuits Workbook".
1. Which one of the following procedures is a precaution that should be taken when working with an instrument current transformer?
- [ ] Ground the secondary after disconnecting it.
- [ ] Short the primary before disconnecting it.
- [ ] Ground the primary after disconnecting it.
- [ ] Short the secondary before disconnecting it.
2. If two incandescent light bulbs are connected in parallel in a 120 volt circuit, the result will be .
- [ ] the life of each bulb will double
- [ ] both bulbs will light up to normal brilliancy
- [ ] one bulb will be dimly lit and the other completely dark
- [ ] the voltage across both lamps will be cut in half
3. In wiring a door bell circuit in a residence, the push button is generally connected in the secondary of a low voltage transformer. The reason for this is to .
- [ ] extend the life of the bell
- [ ] prevent arcing on the bell relay
- [ ] keep the 120v line voltage out of the button
- [ ] save money by using bell wire
4. A suspected "open" in a motor field can be tested by using a/an .
- [ ] potentiometer
- [ ] ammeter
- [ ] wattmeter
- [ ] megger
5. A generator has been exposed to water and is being checked for its safe operation. Therefore, it is necessary to
.
- [ ] check for shorted coils with a growler
- [ ] take moisture readings with a hydrometer
- [ ] ground the commutator, or slip rings and run it at half load for 12 hours
- [ ] test insulation values with a megger
6. An ohmmeter can be used to measure
.
- [ ] circuit continuity
- [ ] current flow in a circuit
- [ ] voltage between two points in a circuit
- [ ] power
7. If an appliance is plugged in but the switch is off, the electrician should always consider the appliance to be .
- [ ] de-energized
- [ ] ungrounded
- [ ] grounded
- [ ] energized
8. Ammeters and voltmeters used in sinusoidal AC power systems indicate which of the following values of the waveforms measured?
- [ ] Average value
- [ ] Root-mean-square value
- [ ] Peak value
- [ ] Maximum value
9. You are to check the power factor (PF) of a certain electrical load. You would use .
- [ ] a KWH meter
- [ ] a wattmeter
- [ ] an ammeter, a wattmeter and a voltmeter
- [ ] a voltmeter and an ammeter
10. The reason circuit breakers are constructed to be "trip free" is that breakers .
- [ ] cannot be opened accidentally
- [ ] can be closed with less effort
- [ ] can be opened with less arcing
- [ ] cannot be held closed when there is an overload
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