Electrical Circuits

Question 1

The symbol in fig 58 is a:

a) resistor
b) rheostat
c) variable resistor
d) potentiometer

Answer 1

c) variable resistor

Question 2

The symbol in fig 59 is a:

a) resistor
b) diode
c) transistor
d) directional arrow

Answer 2

b) diode

Question 3

The symbol in fig 60 is:

a) a motor
b) an electromagnet
c) a transistor
d) a rotary switch

Answer 3

a) a motor

Question 4

The amount of current in a circuit is determined by:

a) voltage
b) resistance
c) both a and b
d) neither a or b

Answer 4

c) both a and b

Question 5

An ammeter reading of 0.025A could be expressed as:

a) 2.5 mA
b) 0.25 mA
c) 250 mA
d) 25 mA

Answer 5

d) 25 mA

Question 6

If an open occurs in a circuit, current:

a) increases
b) decreases
c) remains the same
d) goes up in series circuit and down in parallel circuit

Answer 6

b) decreases

Question 7

As applied volatage increases:

a) current increases
b) current decreases
c) resistance increases
d) resistance decreases

Answer 7

a) current increases

Question 8

To connect a voltmeter into a circuit, the voltmeter:

a) can be connected in series or parallel with the circuit
b) will be damaged if connected in series with the circuit
c) will be damaged if connected in paralle with the circuit
d) is normally connected in series with a circuit

Answer 8

a) can be connected in series or parallel with the circuit

Question 9

To connect an ammeter into a circuit, the ammeter:

a) must be connected in parallel with the circuit
b) can be connected in series or parallel with the circuit
c) must be turned off before connecting in parallel with the circuit
d) must be connected in series with the circuit

Answer 9

d) must be connected in series with the circuit

Question 10

Voltage is:

a) electrical flow
b) electrical resistance
c) potential difference
d) electrical capacity

Answer 10

c) potential difference

Question 11

Resistance is:

a) affected by voltage
b) affected by current
c) determined by construction
d) all of the above

Answer 11

c) determined by construction

Question 12

Amperage is:

a) opposition to electrical flow
b) not affected by voltage
c) flow of electrons
d) the same as voltage

Answer 12

c) flow of electrons

Question 13

Resistance of a circuit decreases if:

a) an open occurs in a parallel circuit
b) an open occurs in a series or parallel circuit
c) a resistor is removed from a parallel circuit
d) a short occurs in a series or parallel circuit

Answer 13

d) a short occurs in a series or parallel circuit

Question 14

An ohmmeter reading of infinity indicates a:

a) very low resistance reading
b) resistance higher than the meter is capable of reading
c) reading of no resistance
d) resistance lower than the meter is capable of reading

Answer 14

b) resistance higher than the meter is capable of reading

Question 15

An ohmmeter reading of 2.4 M ohms could be expressed as:

a) 2 400 000 ohms
b) 2400 ohms
c) 0.000 0024 ohms
d) 0.0024 ohms

Answer 15

a) 2 400 000 ohms

Question 16

As resistance of a circuit increases:

a) current increases
b) current decreases
c) voltage increases
d) voltage decreases

Answer 16

b) current decreases

Question 17

The term impedance, as related to a voltmeter, indicates:

a) how accurate the voltmeter readings are
b) how low the meter will read
c) how high the meter will read
d) the amount the meter will load the circuit

Answer 17

d) the amount the meter will load the circuit

Question 18

A voltmeter connected as shown in fig 61 wwould indicate approximately:

a) 12 V
b) 4 V
c) 6 V
d) 0 V

Answer 18

b) 4 V

Question 19

A voltmeter connected as shown in fig 62 would indicate approximately:

a) 12 V
b) 4 V
c) 2 V
d) 0 V

Answer 19

a) 12 V

Question 20

a voltmeter connected as shown in fig 63 would indicate approximately:

a) 12 V
b) 4 V
c) 2.4 V
d) 8 V

Answer 20

d) 8 V

Question 21

An ammeter connected as shown in fig 64 would indicate approximately:

a) 0.5 A
b) 1 A
c) 8 A
d) 72 A

Answer 21

b) 1 A

Question 22

An ammeter connected as shown in fig 65 would indicate approximately:

a) 2.4 A
b) 12 A
c) 4 A
d) 17.7 A

Answer 22

c) 4 A

Question 23

An ammeter connected as shown in fig 66 would indicate approximately:

a) 2.4 A
b) 0.5 A
c) 4 A
d) 2 A

Answer 23

b) 0.5 A

Question 24

An ohmmeter connected as shown in fig 67 would indicate approximately:

a) 0.48 ohms
b) 0.86 ohms
c) 8.97 ohms
d) 39 ohms

Answer 24

d) 39 ohms

Question 25

An ohmmeter connected as shown in fig 68 would indicate approximately:

a) 4 ohms
b) 5 ohms
c) 6.67 ohms
d) 15 ohms

Answer 25

a) 4 ohms

Question 26

An ohmmeter connected as shown in fig 69 would indicate approximately:

a) 18 ohms
b) 6 ohms
c) 12 ohms
d) 30 ohms

Answer 26

c) 12 ohms

Question 27

A voltmeter connected as shown in fig 70 would indicate approximately:

a) 0 V
b) 2 V
c) 4 V
d) 12 V

Answer 27

d) 12 V

Question 28

A voltmeter connected as shown in fig 71 would indicate approximately:

a) 0 V
b) 2 V
c) 4 V
d) 8 V

Answer 28

a) 0 V

Question 29

If a resistor in a circuti is shorted, an ammeter in the circuit would indicate:

a) more current than normal
b) more than 4 A
c) less current than normal
d) less than 4 A

Answer 29

a) more current than normal

Question 30

In an automotive electrical system, a resistor could be:

a) a light bulb
b) a stereo or radio
c) a starter
d) any of the above

Answer 30

d) any of the above