USCG Exam PracticeElectrical basics — generators, motors, and safety
Which instruments are required to be provided for an AC generator rated at 50 volts or more that is in operation?
- ✓ A voltmeter, an ammeter, and a means for measuring frequencyCorrect
- B. A voltmeter and a wattmeter only
- C. An ammeter and a power factor meter only
- D. A voltmeter, an ammeter, and a tachometer
Why A is correct
46 CFR §183.320(c) requires a voltmeter and an ammeter for any generator rated at 50 volts or more, and additionally requires a means for measuring frequency for each alternating current generator. A tachometer and power factor meter are not listed requirements.
Cited:46 CFR §183.320