When using an electrical meter to check that a circuit is safe to work on, it is important to verify the proper scale, current, or both that is being used because
a) it may appear that no voltage or current is present and therefore safe
b) the meter will be damaged
c) the user will be subjecting himself or herself to danger
d) the main high voltage transformer circuit will be opened
e) electrical wiring will be damaged by fire or overheating
Answer: A
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Power Engineering Chapter 80
- Batteries
- A power meter
- Increasing load on a motor or other electrical device is indicated by?
- Which electrical system is used to test with AC? 1. House wiring 2. Most power plant motors 3. Automotive wiring 4. Power plant battery vault
- Which electrical system is used to test with DC? 1. House wiring 2. Most power plant motors 3. Automotive wiring 4. Power plant battery vault
- Whenever voltmeters are connected to a direct current the:
- High amperages are stepped down to a maximum of _____ A before the kWh meter can be used to measure the amount.
- A kilowatt-hour meter has a small motor which:
- Clamp-on ammeter readings may be inaccurate if:
- Higher voltages are stepped down to a maximum of _____ V before the kWh meter can be used to measure the amount.
- Ammeters are connected:
- Utility companies have a surcharge to their customers based on:
- The most common measurement made with an electrical meter is:
- When reading the dials of a power meter, read:
- An Ammeter must _____ to the electrical circuit.
- The black demand pointer of a power meter:
- The instrument used to measure electrical power used in a period of time, is the:
- Ammeters are connected with the negative or black lead connected to the:
- A voltmeter must ______________ electrical circuit.
- The voltmeter is placed:
- A clamp-on ammeter measures current flow by using: