Deck 3: Circuit Testers and Digital Meters

Question 1

An ohmmeter should be connected to the circuit or component being tested ________.

A) in series
B) only when no power is flowing (electrically open circuit)
C) in parallel
D) Both B and C

Answer 1

D

Question 2

When using a test light to probe for electrical power, the alligator clip is connected to ________.

A) a clean metal part of the body
B) the battery negative terminal
C) the battery positive terminal
D) Either A or B

Answer 2

B

Question 3

When testing a diode with the multimeter set on "Diode Check" a reading of 0.6 volts is obtained. This indicates that the diode being tested is a(n) ________.

A) light emitting diode (LED)
B) open diode
C) silicon diode
D) shorted diode

Answer 3

C

Question 4

Which is the highest reading?

A) 38.7 mV
B) 0.1 V
C) 0.387 V
D) 0.01 V

Question 5

Which of these is safe for use in circuits with electronic components?

A) LED test light
B) Continuity tester
C) Both A and B
D) Neither A nor B

Question 6

Which device illuminates a different color when connected to power or ground sides of a circuit?

A) LED test light
B) Logic probe
C) Both A and B
D) Neither A nor B

Question 7

Which device may be useful for testing hall effect sensors?

A) Low power test light
B) Logic probe
C) Both A and B
D) Neither A nor B

Question 8

When using a DMM, the black lead usually goes in which port?

A) 10A
B) COM
C) VDC
D) None of these

Question 9

kHz is a unit describing what property?

A) Diode bias
B) Continuity
C) Frequency
D) None of these

Question 10

Ammeters should be connected ________ with the circuit being tested.

A) in series
B) across a load
C) in parallel
D) None of these

Question 11

To prevent blowing the meter fuse in a DMM ________.

A) install a fuse in line with the meter lead
B) never test resistance of an energized circuit
C) Both A and B
D) Neither A nor B

Question 12

Which type of ammeter can measure current when clamped around a conductor?

A) Selective
B) Reluctive
C) Inductive
D) None of these

Question 13

The ability to measure AC current is useful when diagnosing ________.

A) alternator function
B) resistance in a battery cable
C) starter motor operation
D) None of these

Question 14

The internal resistance of any meter is only effective if the meter is set on the ________ scales.

A) ammeter
B) ohmmeter
C) voltmeter
D) None of these

Question 15

When measuring resistance, a reading of OL on the DMM indicates ________.

A) an open circuit
B) a defective meter probe
C) continuity of the circuit
D) None of these

Question 16

When interpreting meter readings in autoranging mode ________.

A) convert the reading prefix to base units if needed
B) note the prefix indicated by the meter
C) Both A and B
D) Neither A nor B

Question 17

Digital meters for automotive testing should include ________.

A) DC amps up to at least 10A
B) diode tester
C) Both A and B
D) Neither A nor B

Question 18

With which signal pattern is the RMS reading the same as the average reading?

A) Square wave
B) Nonsymmetric
C) Sine wave
D) None of these

Question 19

Which term is used to describe the resolution of a meter?

A) Counts
B) Digits
C) Both A and B
D) Neither A nor B

Question 20

When selecting a meter, percentage accuracy ratings that are ________ indicate more precise meters.

A) lower
B) blank
C) neutral
D) higher

Question 21

When working on a hybrid vehicle, which type of meter is recommended?

A) CAT II or CAT III
B) CAT III or CAT IV
C) CAT I or CAT II
D) Any of these would be OK

Question 22

A fused jumper wire can be used to power or ground a circuit during testing.

Question 23

A 12 volt test light is a good tool for testing voltage levels.

Question 24

This DMM is set to read ohms. The reading shown means ________.

A) a faulty meter display
B) Insufficient information
C) an open circuit
D) zero resistance