General Electrical
Total resistance in the circuit wants to be calculated in a parallel circuit. The circuit has two 20 ohm resistors in parallel. Technician A states the total resistance is 10 ohms. Tech B states the total resistance is 40 ohms. Which technician is correct?
Technician A.
The brushes are used to transfer electrical power between __________.
A. Field coils and the armature
B. The commutator segments
C. The solenoid and the field coils
D. The armature and the solenoid
A. Field coils and the armature
A corroded light socket could most likely cause ______________.
A. A fuse to blow in the circuit
B. The light to be dim as a result of reduced current flow
C. A feedback to occur to another circuit
D. Damage to occur to the bulb as a result of decreased voltage
B. The light to be dim as a result of reduced current flow
What color are the airbag electrical connectors and conduit?
A. Blue
B. Red
C. Yellow
D. Orange
C. Yellow
An acceptable charging circuit voltage on a 12‑volt system is ______________.
A. 13.5 to 14.8 volts
B. 12.6 to 15.6 volts
C. 12 to 14 volts
D. 14.9 to 16.1 volts
A. 13.5 to 14.8
The horn is not operating on a older SUV. The relay was bench tested and was in good condition. Resistance is now going to be measured on the horn. A reading of 0 ohms was measured. Technician A states the horn is in good condition. Technician B states the horn is shorted. Which technician is correct?
Technician B.
A battery is being load tested. What load should the technician use when performing this test.
A. The load should be 1/2 of the cold cranking amps (CCA)
B. The load should be 1/2 of the reserve capacity (RC)
C. The load should be 4 times the amp hours (Ah)
D. None of these is correct
A. The load should be 1/2 of the cold cranking amps (CCA)
Which of the following statements about LED headlights is NOT correct?
A. LED headlights have a longer lifespan compared to halogen headlights
B. LED headlights require a filament to produce light
C. LED headlights are more energy-efficient than traditional headlights
D. LED headlights generate less heat compared to incandescent bulbs
B. LED headlights require a filament to produce light
What is the purpose and function of an immobilizer system?
A. To prevent entry inside the vehicle
B. Only allows the use of the ignition key that is properly matched to the lock cylinder
C. Prevents the vehicle from starting or running if the correct key is not used
D. Requires that the driver enter a password to start the vehicle
C. Prevents the vehicle from starting or running if the correct key is not used
During a charging system current output test, Technician A says that a low current output could be caused by a faulty alternator. Technician B says that a low current output could also be caused by a high resistance in the charging circuit. Who is right?
Both technicians A and B
As temperature increases, ______________.
A. The resistance of a conductor decreases
B. The resistance of a conductor increases
C. The resistance of a conductor remains the same
D. The voltage of the conductor decreases
B. The resistance of a conductor increases
Which one of these would NOT be a diagnostic step when diagnosing a “no crank” customer concern?
A. Check the condition of the fuel pump
B. Check operation of the theft deterrent systems
C. Check the battery with a load test
D. Test for proper operation of the starter relay
A. Check the condition of the fuel pump
A vehicle’s hazard lights fail to operate when activated, although the turn signals function correctly. Which of these could be the cause?
A. Faulty hazard light switch
B. Burnt-out hazard light bulbs
C. Blown turn signal fuse
D. Defective flasher relay
A. Faulty hazard light switch
A heated steering wheel is reported to be intermittently failing to warm up. The issue seems to occur more frequently in cold weather. Which of these could be the cause?
A. A faulty temperature sensor
B. Loose electrical connections
C. A malfunctioning heating element
D. A blown fuse
C. A malfunctioning heating element
fter replacing the wires in a vehicle’s charging circuit, the alternator fails to charge the battery. Which of these could be the cause?
A. Incorrect wire gauge used
B. Poor quality connections at terminals
C. Wires not properly routed
D. Inadequate insulation on wires
C. Wires not properly routed
If the voltage increases in a circuit, what happens to the current (amperes) if the resistance remains the same?
A. Increases
B. Decreases
C. Remains the same
D. Cannot be determined
A. Increases
A vehicle experiences extended cranking before starting. Technician A says that a weak battery could be the cause. Technician B says that a faulty fuel pump could be the cause. Who is right?
Technician B.
A customer complains that the life of the halogen headlight bulbs is only two weeks. Several different brands have been tried with the same results. What is the most likely cause?
A. Poor ground at the headlights
B. Shorted headlight switch
C. The new bulbs were touched with bare hands during installation
D. The bulbs were installed backwards
C. The new bulbs were touched with bare hands during installation
A horn blows all the time and cannot be shut off unless the wire(s) to the horn is removed. What is the most likely cause?
A. An open horn relay
B. The horn wire in the steering column is shorted to ground
C. A poor ground on the horn
D. A defective horn
B. The horn wire in the steering column is shorted to ground
A vehicle is experiencing fluctuating voltage levels and occasional charging system warning lights. Upon inspection, the technician notices that the alternator output voltage varies significantly while the engine is running. Which of the following could be the cause?
A. A worn serpentine belt
B. A faulty voltage regulator
C. A corroded battery terminal
D. A damaged alternator diode
B. A faulty voltage regulator
If a digital meter face shows 0.93 when set to read kilo ohms, the reading means __________.
A. 93 ohms
B. 930 ohms
C. 9,300 ohms
D. 93,000 ohms
B. 930 ohms
A starter motor turns slowly when the engine is being cranked. Technician A says that a positive battery cable with greater than 0.5 volt voltage drop could be the cause. Technician B says that a negative battery cable with high resistance could be the cause. Which Technician is correct?
Both Technician A and B.
The interior lights in a vehicle stay on even after the doors are closed and the vehicle is started. Which of these could be the cause?
A. Faulty door switch
B. Blown fuse
C. Malfunctioning light control module
D. Shorted wiring in the interior light circuit
D. Shorted wiring in the interior light circuit
A vehicle’s power door locks intermittently fail to operate. Sometimes all the doors fail to lock or unlock, while at other times only one or two doors are affected. Which of these could be the cause?
A. A blown fuse
B. A faulty door lock actuator
C. A damaged wiring harness
D. A malfunctioning control module
C. A damaged wiring harness
A vehicle’s charging system is intermittently failing to charge the battery. During inspection, the technician finds no obvious faults with the alternator or battery. Which of these could be the cause?
A. A blown fuse in the charging circuit
B. A loose or corroded ground connection
C. A defective voltage regulator
D. A worn serpentine belt
B. A loose or corroded ground connection