Electrical Concepts Quiz

What is current flow?

• Flow of voltage in a circuit.

• Impedance of a circuit.

• Inductive reactance of the circuit.

• Flow of electrons in the circuit.

What is impedance?

• Opposition to alternating current flow.

• Electrical pressure.

• Amperage.

• Voltage applied to the circuit.

Any material that will readily release electrons is called

• an insulator.

• a conductor.

• a resistance.

• a neutron.

The symbol for current is

• E

• I

• R

• W

After replacing a start capacitor and powering up the compressor to check its operation the technician should;

• Connect an ohmmeter to the potential relay to make sure the contacts open.

• Connect a manifold gauge set to make sure the compressor is pumping.

• Connect a voltmeter to the coil of the potential relay.

• Clamp an amp-meter around one lead to the capacitor to make sure it is de-energized after start up.

A Technician is running three # 10 THNN conductors from the disconnect to a condensing unit, using one red, one black and one green wire. Which color is used for the ground?

• red

• black

• green

• white

An electron has

• no charge

• a negative charge

• a positive charge

• extra electrons

What is resistance?

• Opposition to current flow

• Electrical pressure

• Amperage

• Voltage applied to the circuit

In electrical wiring a black colored wire usually indicates the;

• safety ground.

• neutral conductor

• ground conductor.

• hot conductor.

Which of the following is generally considered to be within the maximum allowable (plus or minus) supply voltage variation?

• 25%

• 20%

• 15%

• 5%