310T Exam - Electronical and
Electrical Systems Study Guide Exam
with Actual Answers 2025-2026
Edition.
1. When trouble shooting an electrical engine or transmission, what else might be require?
a. Test lamp
b. Break out box
c. Continuity tester
d. Ohm meter - Answer b. break out box
2. An electronically equipped vehicle over heats, the engine fan will no engage upon engine
ECM
request. What is likely the issue?
a. Relay contacts burnt
b. Open in the relay
c. Solenoid open-circuit
d. Solenoid seized - Answer b. open in the relay
3. When performing a test on the stator, there is "zero-ohms" measured between the windings
end and the stator frame. What should be done?
a. Replace the stator
b. Re-solder windings
c. Install new brushes
d. Increase the voltage - Answer a. Replace the stator
4. Alternator rings are pitted but can be repaired, what procedure should be done?
a. Polish with a crocus cloth
b. Smooth with fine sandpaper
c. Replace slip rings
d. Install new brushes as-is - Answer a. polish for a crocus cloth
5. What procedure should be followed when repairing multiple wires within a short section of a
wiring harness?
,a. Twist wires together
b. Twist and tape connections
c. Solder wires in parallel
d. Stagger splices, solder and tape - Answer d. Stagger splices, solder and tape
6. When the brakes are applied, the trailer clearance lights become dim and flicker, what is the
likely cause?
a. Light switch overload
b. High resistance in the tail light assembly
c. Short circuit at the trailer connector
d. Incorrect supply voltage - Answer c. Short circuit at the trailer connector
7. Cruise control functions fine during the day time, once the running lights are on, cruise
control
fails to function. What is the likely cause?
a. Faulty switch
b. High resistance in the trailer plug
c. Short circuit in the brake light circuit
d. open circuit in the brake light circuit - Answer c. Short circuit in the brake light circuit
8. What is the correct procedure for testing the pickup coil in a SI engine?
a. Voltmeter
b. Test light
c. Oscilloscope
d. Ohmmeter - Answer d. Ohmmeter
9. In order to properly repair wiring, what is the proper procedure?
a. Solder with a resin core, then heat shrink
b. Solder with an acid core, then heat shrink
c. Butt splice
d. Butt connectors - Answer a. Solder with a resin core, then heat shrink
10. Alternator output is low, what should be checked first?
a. Voltage regulator
b. Diode trio
, c. Commutator
d. Slip ring - Answer a. Voltage regulator
11. What turns the three-phase alternating current into Direct current in a alternator?
a. Voltage regulator
b. Slip rings
c. Stator
d. Diode trio - Answer d. diode trio
12. Upon disassembly, a no-operating starter has loose solder particles escaping. What is likely
the cause?
a. Over-speed
b. Low battery voltage
c. Defective solenoid
d. Excessive voltage - Answer b. low battery voltage
13. A starter solenoid provides a chattering sounds while activated, what is this likely a cause
of?
a. Open circuit within the starter
b. Defective solenoid
c. Open circuit within the hold in windings
d. Low battery voltage - Answer d. Low battery voltage
14. What is the correct procedure when testing for cranking amperage using an inductive pick
up?
a. Place the inductive pick-up around the starter cable, while cranking
b. Place the inductive pick up around the ground cable, wile cranking
c. Load test the battery for 15 seconds
d. Perform a battery load test - Answer a. Place the inductive pick-up around the starter
cable, while cranking
15. The primary purpose of using a relay is to?
a. Allow a low voltage circuit to control a high voltage circuit
b. Allow a low amperage circuit to control a high amperage circuit
c. To reduce the amount of diodes within the circuit
Electrical Systems Study Guide Exam
with Actual Answers 2025-2026
Edition.
1. When trouble shooting an electrical engine or transmission, what else might be require?
a. Test lamp
b. Break out box
c. Continuity tester
d. Ohm meter - Answer b. break out box
2. An electronically equipped vehicle over heats, the engine fan will no engage upon engine
ECM
request. What is likely the issue?
a. Relay contacts burnt
b. Open in the relay
c. Solenoid open-circuit
d. Solenoid seized - Answer b. open in the relay
3. When performing a test on the stator, there is "zero-ohms" measured between the windings
end and the stator frame. What should be done?
a. Replace the stator
b. Re-solder windings
c. Install new brushes
d. Increase the voltage - Answer a. Replace the stator
4. Alternator rings are pitted but can be repaired, what procedure should be done?
a. Polish with a crocus cloth
b. Smooth with fine sandpaper
c. Replace slip rings
d. Install new brushes as-is - Answer a. polish for a crocus cloth
5. What procedure should be followed when repairing multiple wires within a short section of a
wiring harness?
,a. Twist wires together
b. Twist and tape connections
c. Solder wires in parallel
d. Stagger splices, solder and tape - Answer d. Stagger splices, solder and tape
6. When the brakes are applied, the trailer clearance lights become dim and flicker, what is the
likely cause?
a. Light switch overload
b. High resistance in the tail light assembly
c. Short circuit at the trailer connector
d. Incorrect supply voltage - Answer c. Short circuit at the trailer connector
7. Cruise control functions fine during the day time, once the running lights are on, cruise
control
fails to function. What is the likely cause?
a. Faulty switch
b. High resistance in the trailer plug
c. Short circuit in the brake light circuit
d. open circuit in the brake light circuit - Answer c. Short circuit in the brake light circuit
8. What is the correct procedure for testing the pickup coil in a SI engine?
a. Voltmeter
b. Test light
c. Oscilloscope
d. Ohmmeter - Answer d. Ohmmeter
9. In order to properly repair wiring, what is the proper procedure?
a. Solder with a resin core, then heat shrink
b. Solder with an acid core, then heat shrink
c. Butt splice
d. Butt connectors - Answer a. Solder with a resin core, then heat shrink
10. Alternator output is low, what should be checked first?
a. Voltage regulator
b. Diode trio
, c. Commutator
d. Slip ring - Answer a. Voltage regulator
11. What turns the three-phase alternating current into Direct current in a alternator?
a. Voltage regulator
b. Slip rings
c. Stator
d. Diode trio - Answer d. diode trio
12. Upon disassembly, a no-operating starter has loose solder particles escaping. What is likely
the cause?
a. Over-speed
b. Low battery voltage
c. Defective solenoid
d. Excessive voltage - Answer b. low battery voltage
13. A starter solenoid provides a chattering sounds while activated, what is this likely a cause
of?
a. Open circuit within the starter
b. Defective solenoid
c. Open circuit within the hold in windings
d. Low battery voltage - Answer d. Low battery voltage
14. What is the correct procedure when testing for cranking amperage using an inductive pick
up?
a. Place the inductive pick-up around the starter cable, while cranking
b. Place the inductive pick up around the ground cable, wile cranking
c. Load test the battery for 15 seconds
d. Perform a battery load test - Answer a. Place the inductive pick-up around the starter
cable, while cranking
15. The primary purpose of using a relay is to?
a. Allow a low voltage circuit to control a high voltage circuit
b. Allow a low amperage circuit to control a high amperage circuit
c. To reduce the amount of diodes within the circuit
