DMM: Voltmeter, Ammeter, and Ohmmeter Review Questions

A_______ should always be placed in parallel with the power supply being tested

• voltmeter

• ohmeter

• ammeter

The meter used to measure the electrical current in a circuit is the

• voltmeter

• ohmmeter

• ammeter

The meter used to measure the electrical resistance in a circuit is the

• voltmeter

• ohmmeter

• ammeter

When measuring voltage of a load, the voltmeter must

• be placed in series, circuit has to be on

• be placed in series, circuit has to be off

• be placed in parallel, circuit has to be on

• be placed in parallel, circuit has to be off

When measuring current to a load, the ammeter must

• be placed in series, circuit has to be on

• be placed in series, circuit has to be off

• be placed in parallel, circuit has to be on

• be placed in parallel, circuit has to be off

When measuring resistance to a load, the ohmmeter must

• be placed in series, circuit has to be on

• be placed in series, circuit has to be off

• be placed in parallel, circuit has to be on

• be placed in parallel, circuit has to be off

When testing for resistance across a switch, what reading would be obtained if the switch were in the closed position?

• zero or close to zero

• infinite

• no one knows

When testing for resistance across a switch, what reading would be obtained if the switch were in the open position?

• zero or close to zero

• infinite

• no one knows

A voltmeter should

• Always be set to the highest scale when working with an unknown voltage.

• Always be set to the lowest scale when working with an unknown voltage.

• Never be used with an unknown voltage.

An ammeter must

• Always be placed in series to the load

• Always be placed in parallel to the load