Basic Automotive Electrical
Diagnostics Exam Questions and
Answers 100% Pass
Ch. 15-16
A _____ is an electromagnet with a movable core that converts electrical current into
mechanical movement. - ✔✔Solenoid
A potentiometer [type of variable resistor] can not be tested with a _______. - ✔✔Test
Light
A simple on/off switch with one input terminal and one output is a _____type switch. -
✔✔SPST [single pole, single throw]
A technician is diagnosing the cause of an insufficient heat problem. He notices the fan
is working but not providing much air flow. He 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 ammeter shows 26 amps when the fan is jumped directly to
the battery. What could be the problem? - ✔✔shorted wiring in the fan motor
Disclaimer: Original Content, No Copyright Infringement, All Rights Reserved © 2025 1
, A technician is testing 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 says check the coil input
terminal for voltage. Technician B says connect 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 only
A technician is testing a connector in a circuit with a voltmeter. With the power on in
the circuit, the meter reads 12 volts when the leads are placed on each side of the
connector. This indicates that the connector _____. - ✔✔is open
What is not a lab scope adjustment? - ✔✔amperage level
What information about a vehicles wiring cannot be found in the electrical schematics? -
✔✔Component location on vehicle
DMMs that can measure temperature use a ________ adapter that is placed on or near
the object to be checked. - ✔✔Thermocouple
In the formula E = I x R. E represents____ - ✔✔voltage
In the formula E = I x R, I represents______ - ✔✔Current
In the formula E = I x R, R represents______ - ✔✔Resistance
Disclaimer: Original Content, No Copyright Infringement, All Rights Reserved © 2025 2
Diagnostics Exam Questions and
Answers 100% Pass
Ch. 15-16
A _____ is an electromagnet with a movable core that converts electrical current into
mechanical movement. - ✔✔Solenoid
A potentiometer [type of variable resistor] can not be tested with a _______. - ✔✔Test
Light
A simple on/off switch with one input terminal and one output is a _____type switch. -
✔✔SPST [single pole, single throw]
A technician is diagnosing the cause of an insufficient heat problem. He notices the fan
is working but not providing much air flow. He 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 ammeter shows 26 amps when the fan is jumped directly to
the battery. What could be the problem? - ✔✔shorted wiring in the fan motor
Disclaimer: Original Content, No Copyright Infringement, All Rights Reserved © 2025 1
, A technician is testing 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 says check the coil input
terminal for voltage. Technician B says connect 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 only
A technician is testing a connector in a circuit with a voltmeter. With the power on in
the circuit, the meter reads 12 volts when the leads are placed on each side of the
connector. This indicates that the connector _____. - ✔✔is open
What is not a lab scope adjustment? - ✔✔amperage level
What information about a vehicles wiring cannot be found in the electrical schematics? -
✔✔Component location on vehicle
DMMs that can measure temperature use a ________ adapter that is placed on or near
the object to be checked. - ✔✔Thermocouple
In the formula E = I x R. E represents____ - ✔✔voltage
In the formula E = I x R, I represents______ - ✔✔Current
In the formula E = I x R, R represents______ - ✔✔Resistance
Disclaimer: Original Content, No Copyright Infringement, All Rights Reserved © 2025 2
