Question 1

A conventional ammeter is always connected in ____________________ with the circuit.

Accepted Answer

The answer of A conventional ammeter is always connected in...

Question 2

The number of cycles per second is called ____________________.

Accepted Answer

The answer of The number of cycles per second is...

Question 3

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

Accepted Answer

The answer of Technician A uses heat shrink tubing to...

Question 4

A voltmeter is connected in ____________________ with the circuit.

Accepted Answer

The answer of A voltmeter is connected in ____________________ with...

Question 5

A beeping noise coming from the DMM when the function selector is set to ohms indicates that the circuit has ____________________.

Accepted Answer

The answer of A beeping noise coming from the DMM...

Question 6

Technician A uses the schematic diagram to locate exactly where on the vehicle all of the circuit components are located. Technician B 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. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Technician B is correct because electrical schematic diagrams are primarily used to trace the flow of current through the circuit components, not to locate their physical position on the vehicle.

Question 7

Taking electrical measurements from the external wire terminal ends on the outside of a plugged-in electrical connector is called ____________________.

Accepted Answer

The answer of Taking electrical measurements from the external wire...

Question 8

Technician A says dielectric grease is used on wire terminals and connectors to prevent corrosion. Technician B says dielectric grease reduces the resistance between the terminals. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Dielectric grease is used to prevent corrosion on wire terminals and connectors by sealing out moisture. It does not reduce the resistance between terminals; instead, it acts as an insulator.

Question 9

You are wiring a vehicle for a trailer hitch. The trailer will have eight parking lamps. Each parking lamp uses a 6 watt light bulb. What size fuse should be used to supply power for the parking lamp circuit? (Assume that the normal operating voltage is 14 volts.)

Accepted Answer

The answer of You are wiring a vehicle for a...

Question 10

The most common way to check a variable resistor is with a(n)____________________.

Accepted Answer

The answer of The most common way to check a...

Question 11

The wiring harness for the SRS (air bag)circuit has a _____ harness cover.
A)red
B)blue
C)day glow green
D)yellow

Accepted Answer

The wiring harness for the SRS (air bag) circuit typically has a yellow harness cover to distinguish it from other wiring and indicate caution due to the safety-critical nature of the system.

Question 12

A technician tests a circuit that uses a ground-controlled relay to provide power to the circuit load. With the relay installed in its socket, the control terminal of the relay is grounded by a jumper wire; nothing happens. Technician A checks the coil input terminal for voltage. Technician B connects a jumper wire between battery negative and the output terminal of the relay to check if the load is the problem. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Technician A's approach is correct because checking the coil input terminal for voltage is a standard method to diagnose a relay issue. If there's no voltage, the relay won't activate. Technician B's method is incorrect because connecting a jumper wire from the battery negative to the output terminal of the relay does not properly test the relay or the load; it could potentially cause a short circuit or damage to the system.

Question 13

Which piece of information about the vehicle's wiring cannot be found in the electrical schematics?
A)wire color
B)wire size
C)connector terminal designation
D)component location on vehicle

Accepted Answer

Electrical schematics primarily provide information on the electrical circuitry of a vehicle, including wire color, size, and connector terminal designations. However, they do not typically show the physical component location on the vehicle.

Question 14

A voltage drop test is performed to find unwanted ____________________.

Accepted Answer

The answer of A voltage drop test is performed to...

Question 15

An electrical ____________________ is a diagram used to troubleshoot a circuit.

Accepted Answer

The answer of An electrical ____________________ is a diagram used...

Question 16

____________________ solder is used to repair electrical wiring.

Accepted Answer

The answer of ____________________ solder is used to repair electrical...

Question 17

Duty cycle is measured in ____________________.

Accepted Answer

The answer of Duty cycle is measured in ____________________....

Question 18

The best method for testing wires and electrical connections is a(n)_____.
A)ohmmeter test
B)voltage drop test
C)inductive ammeter
D)infrared pyrometer

Accepted Answer

A voltage drop test is the best method for testing wires and electrical connections because it directly measures the voltage loss across a connection or wire under load, indicating resistance or issues that could affect the circuit's performance.

Question 19

A technician is diagnosing the cause of an insufficient heat problem. He/She notices the fan is working but not providing much air flow. He/She disconnects the fan power feed wire and connects the fan to the battery using a fused jumper wire. The specification for the fan motor is 16 amps. His/Her ammeter shows 26 amps when the fan is jumped directly to the battery. What could be the problem?
A)bad fan motor ground
B)high resistance in the fan motor wiring
C)shorted wiring in the fan motor
D)All the answers are correct.

Accepted Answer

The ammeter showing 26 amps when the fan is jumped directly to the battery, which is significantly higher than the specified 16 amps, indicates a shorted wiring in the fan motor. This is because a short circuit would allow more current to flow than what is specified, leading to the observed overcurrent condition.

Question 20

A potentiometer [type of variable resistor] can be tested with all the following tools EXCEPT:
A)test light
B)voltmeter
C)ohmmeter
D)digital lab scope (DSO)

Accepted Answer

A test light, designed to check for the presence of voltage, is not suitable for testing a potentiometer, which requires measuring resistance or voltage variation across its terminals. Voltmeters, ohmmeters, and digital lab scopes (DSOs) can all be used to measure these properties accurately.

Quiz 16: General Electrical System Diagnostics and Service

A conventional ammeter is always connected in ____________________ with the circuit.

The number of cycles per second is called ____________________.

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 voltmeter is connected in ____________________ with the circuit.

A beeping noise coming from the DMM when the function selector is set to ohms indicates that the circuit has ____________________.

Taking electrical measurements from the external wire terminal ends on the outside of a plugged-in electrical connector is called ____________________.

Technician A says dielectric grease is used on wire terminals and connectors to prevent corrosion. Technician B says dielectric grease reduces the resistance between the terminals. Who is correct?

You are wiring a vehicle for a trailer hitch. The trailer will have eight parking lamps. Each parking lamp uses a 6 watt light bulb. What size fuse should be used to supply power for the parking lamp circuit? (Assume that the normal operating voltage is 14 volts.)

The most common way to check a variable resistor is with a(n)____________________.

The wiring harness for the SRS (air bag) circuit has a _____ harness cover.

Which piece of information about the vehicle's wiring cannot be found in the electrical schematics?

A voltage drop test is performed to find unwanted ____________________.

An electrical ____________________ is a diagram used to troubleshoot a circuit.

____________________ solder is used to repair electrical wiring.

Duty cycle is measured in ____________________.

The best method for testing wires and electrical connections is a(n) _____.

A potentiometer [type of variable resistor] can be tested with all the following tools EXCEPT: