Deck 18: Basic Electricalelectronic System Service

Question 1

Technician A says to measure resistance of a component or circuit, the power must be removed first.Technician B says when measuring resistance, the meter applies a very small voltage to the component or circuit and measures the voltage drop.Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Answer 1

C

Question 2

A short to ground can lead to overheated wiring and a fire.

Answer 2

True

Question 3

Hybrid and electric vehicles use bright ______ wiring and warning stickers to indicate high-voltage components.

A)yellow
B)orange
C)red
D)blue

Answer 3

B

Question 4

To measure current flow in a circuit, the meter must be placed in ____________________ into the circuit.

Question 5

____________________ solder is used to repair electrical wiring.

Question 6

Technician A uses the electrical schematic diagram to trace the flow of current through all the switches, wires, connectors, circuit protection devices, and grounds related to the problem before he begins testing.Technician B uses the schematic diagram to locate exactly where on the vehicle all of the circuit components are located.Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 7

Connecting an ohmmeter to a live circuit usually results in damage to the meter.

Question 8

Technician A uses heat shrink tubing to insulate and seal soldered wire connections.Technician B wraps the soldered connection with electrical tape.Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 9

Electrostatic discharge (ESD) is the accidental discharge of static electricity that can damage electronic components.

Question 10

Components such as relays and DC motors perform different functions, depending on what type of vehicle in which they are installed.

Question 11

Which of the following terms refers to the very small movement of terminals against each other that wears away the outer layer of the metal?

A)continuity
B)thermal cycling
C)resistance
D)fretting

Question 12

Most meters can directly measure up to _____ amps.

A)10
B)20
C)30
D)50

Question 13

A voltmeter is connected in ____________________ with the circuit.

Question 14

A standard automotive DMM cannot be used to measure current flow more than 10 amps, so an _______________ ___________ __________ is used.

Question 15

Inductive measurement is being discussed.Technician A says a standard DMM can be used to directly measure current flow more than 10 amps.Technician B says a DMM measures current flow by detecting the strength of the magnetic field created by current flowing through a conductor.Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 16

Voltage drop testing is a dynamic test, meaning that the circuit must be in operation.

Question 17

Circuit protection testing is being discussed.Technician A says fuses can be tested while they are still in the fuse box by touching a test light connected to ground to the back of the fuse.Technician B says that fusible elements can be tested by removing the fuse and checking for continuity or resistance across the terminals.Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 18

When working on a high-voltage system, the meter and leads you are using should be:

A)Category II.
B)Category III.
C)Category IV.
D)Category V.

Question 19

When diagnosing an open circuit, a _________ __________ can be used to bypass the open part of the circuit.

Question 20

All of the following statements are true EXCEPT:

A)Low-amperage circuits, usually 20 amps or less, can be tested directly with the DMM.
B)To measure amperage with the DMM, you must move the positive test lead to the amperage jack.
C)The amperage test setup places internal amperage fuse in series with the positive and negative meter leads.
D)For the DMM to measure amperage, it must be placed in series with the circuit.