Electrical Engineering questions and answers

Electrical Engineering Questions and Answers

How well do you understand the design, building and maintenance of electrical control systems, machinery and equipment? Test your knowledge and prepare for your exams with these Electrical Engineering questions and answers.

41.

A thermistor is a type of

A.

switch

B.

resistor

C.

battery

D.

power supply

Correct answer is B

No explanation has been provided for this answer.

42.

Electrons in the outer orbit are called

A.

nuclei

B.

valences

C.

waves

D.

shells

Correct answer is B

No explanation has been provided for this answer.

43.

The conductance of an 8 ohm resistance is

A.

12.5 mS

B.

8 mS

C.

12 S

D.

125 mS

Correct answer is D

No explanation has been provided for this answer.

44.

When placed close together, two positively charged materials will

A.

attract

B.

become neutral

C.

become negative

D.

repel

Correct answer is D

No explanation has been provided for this answer.

45.

Which of the following is not a type of energy source?

A.

generator

B.

rheostat

C.

solar cell

D.

battery

Correct answer is B

No explanation has been provided for this answer.

46.

The maximum resistance value for a brown, red, yellow, gold resistor is

A.

126,000 Ω

B.

126,600 Ω

C.

114,000 Ω

D.

132,000 Ω

Correct answer is A

No explanation has been provided for this answer.

47.

The minimum resistance value for a blue, gray, red, silver resistor is

A.

612 Ω

B.

6,120 Ω

C.

6,800 Ω

D.

6,460 Ω

Correct answer is B

Because of 10% tolerance(last color silver), this resistance may vary 10% of 6800.

Minimum resistance value = 6800 - 680 = 6120

Maximum resistance value = 6800 + 680 = 7480

48.

Current flows in a circuit when

A.

a switch is opened

B.

a switch is closed

C.

the switch is either open or closed

D.

there is no voltage

Correct answer is B

No explanation has been provided for this answer.

49.

The unit of electrical charge is the

A.

coulomb

B.

joule

C.

volt

D.

watt

Correct answer is A

No explanation has been provided for this answer.

50.

Materials with lots of free electrons are called

A.

conductors

B.

insulators

C.

semi-conductors

D.

filters

Correct answer is A

No explanation has been provided for this answer.