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Exam 4: Test and Measurement Instruments Used in Residential Wiring

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Question 21

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A(n) _________________________ is a break in an electrical conductor or cable.

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Question 22

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A VOM can measure DC and AC voltages, DC and AC current, and ____________________.

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Question 23

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An ohmmeter is used to measure the ____________________ of a circuit or circuit component.

Never work on energized electrical equipment unless it is absolutely necessary.

When using measuring instruments, be sure to use an instrument that has a rating less than the highest value of electricity that you expect to be measuring.

A(n) ____________________ is designed to measure the amount of current flowing in a circuit.

One ____________________-hour is equal to one thousand watt-hours.

Ground resistance meters are used to determine the amount of current that can flow into the earth.

Always read and follow the manufacturer's instructions that are supplied with a meter.

The abbreviation for a digital multimeter is ____________________.

A meter that uses a moving pointer or needle to indicate a value on a scale is called a(n) __________ meter.

When using an analog ohmmeter as a continuity tester, a reading of zero indicates a(n) _________________________.

A break in an electrical conductor or cable is called a(n) __________ circuit.

A(n) ______________ ammeter surrounds the conductor, picks up the strength of the magnetic field that is set up around the conductor, and converts it into a proportional value of current.

Clamp-on ammeters are the most used type of ammeter in residential electrical work.

Meters will become inaccurate over time and recalibration may be necessary to bring a meter back to its intended level of accuracy.

A ________ voltage tester is used by simply bringing it in close proximity of a conductor and it will indicate whether the conductor is energized.

A meter that uses a moving pointer or needle to indicate a value on a scale is called a(n) ________ meter.

A ________ is a device used to indicate whether there is a continuous path for current flow in an electrical circuit or electrical device.

In-line ammeters are always connected in ______________ with the circuit or circuit component being tested.