Free ESCO Electrical Questions and Answers

Question 1

Electricity can produce:

Accepted Answer

All of the above.

Answer

light.

Answer

heat.

Answer

magnetism.

Question 2

What is current flow?

Accepted Answer

The flow of electrons in a circuit

Answer

The flow of water in a circuit

Answer

The flow of air in a circuit

Answer

The flow of light in a circuit

Question 3

What is impedance?

Accepted Answer

Opposition to alternating current

Answer

Resistance to direct current

Answer

Capacity to store electrical energy

Answer

Ability to conduct electricity

Question 4

Like charges will:

Accepted Answer

repel each other.

Answer

attract each other.

Answer

neutralize each other.

Answer

combine to form a larger charge.

Question 5

Any material that will readily release electrons is called:

Accepted Answer

a conductor.

Answer

an insulator.

Answer

a semiconductor.

Answer

a resistor.

Question 6

The safety ground conductor is usually colored:

Accepted Answer

Green

Answer

Red

Answer

Black

Answer

Yellow

Question 7

Which of the following materials would be best suited for use as a semiconductor?

Accepted Answer

Silicon

Answer

Copper

Answer

Aluminum

Answer

Iron

Question 8

Which of the following meters must use internal power to check a load or circuit?

Accepted Answer

Ohmmeter

Answer

Voltmeter

Answer

Ammeter

Answer

Wattmeter

Question 9

What would be the result if a 24-volt, 20-ohm contactor coil was wired in series with a 24-volt, 200-ohm control relay?

Accepted Answer

Only the control relay would operate

Answer

Both the contactor coil and the control relay would operate

Answer

Only the contactor coil would operate

Answer

Neither the contactor coil nor the control relay would operate

Question 10

When testing a capacitor with an analog or digital ohmmeter, the meter should:

Accepted Answer

measure low resistance then return to a high reading.

Answer

measure high resistance then return to a low reading.

Answer

stay at a constant low reading.

Answer

stay at a constant high reading.