Clamp-on ammeter readings may be inaccurate if:
a. Jaws are dirty or misaligned
b. Circuit voltage is too high
c. Circuit resistance is too low
d. Circuit power is too high
e. Conductor insulation is too thick
Answer: A
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Power Engineering Chapter 80
- Batteries
- 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 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:
- 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: