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Exam 4: Test and Measurement Instruments Used in Residential Wiring

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Question 1

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

A) linear
B) non-linear
C) open
D) short

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Question 2

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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.

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Question 3

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The _________________________ meter measures the amount of electrical energy used by the dwelling electrical system.

A voltmeter is connected in ____________________ with the circuit or component being tested.

A(n) __________ is used to determine the amount of resistance to the earth through a grounding electrode.

Excessive current draw results in lower efficiency and wasted energy. An ____________________ can be used to determine if an electrical load is drawing more current than necessary.

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

The letters VOM are an abbreviation for volt, ohm, and __________.

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

A voltmeter is used to measure __________.

One megohm is equal to __________ ohms.

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

A/an _______ is a symbol used on some electrical meters to indicate where a selector switch must be set so the meter can measure the correct type of electrical quantity.

The abbreviation for a digital multimeter is ____________________.

An instrument used to measure values of resistance is called a(n) __________.

__________ are load types where the load impedance is not constant.

List at least 5 rules to follow regarding the proper care and maintenance of measuring instruments.

A(n) __________ can indicate that voltage is present on a circuit without actually being connected to the circuit.

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

Which of the following test instruments must be used only when the circuit in not energized?