Diesel Tech ASE Practice Test 1 Electrical-Electronic
Systems Exam with Answers.
A resistance test was performed on an open toggle switch and the result is 5.857
megohms. Technician A says that the switch is faulty because the reading is beyond the
specifications. Technician B says that the switch has over 5 million ohms of resistance.
Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer B. B only
Which of the following conditions could cause the power locks to fail to operate?
A. Broken connector at the power lock switch
B. Closed power lock circuit breaker
C. An oversized fuse
D. An oversized wire repair in the power lock circuit - Correct Answer A. Broken
connector at the power lock switch
When using a 12 volt, unpowered test lamp to test for voltage, all of the following are
true EXCEPT:
A. The test lamp may be connected to the battery ground
B. The battery should first be disconnected
C. The test lamp may be connected to a chassis ground
D. The test lamp will not illuminate when probed into the circuit at a point after the load -
Correct Answer B. The battery should be disconnected
After removing a 30 amp circuit breaker from a fuse panel, a technician checks
continuity across its terminals with a digital multimeter (DMM). Technician A says that
the current from the ohmmeter will open the circuit breaker. Technician B says the
ohmmeter should read infinity if the circuit breaker is good. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer D. Neither A nor B
Technician A uses a test lamp to detect resistance. Technician B uses a jumper wire
when verifying the operation of circuit breakers, relays, and switches. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer B. B only
, Technician A says that a charge indicator light should come on with the key on, engine
off. Technician B states that if the indicator is not with the engine running, it can be
assumed that the charging system is functioning properly. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer A. A only
Technician A says that an amp clamp is a useful tool to use when checking for key-off
drain. Technician B says that a faulty rectifier bridge in the alternator could cause
excessive key-off drain. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer C. Both A and B
All of these conditions would cause the starter not to crank the engine EXCEPT:
A. the battery is not connected to the starter motor
B. The solenoid does not engage the starter drive pinion with the engine flywheel
C. The control circuit fails to switch the large-current circuit
D. The starter drive pinion fails to disengage from the flywheel - Correct Answer D. The
starter drive pinion fails to disengage from the flywheel
The stoplights are inoperative on a truck equipped with air brakes. Technician A says
that a faulty pressure switch could be the cause. Technician A says that a faulty
pressure switch could be the cause. Technician B says that a faulty hazard lamp switch
could be the cause. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer A. A only
Technician A says that a solenoid has a movable metallic plunger that creates linear
movement when the coil is energized. Technician B says that some solenoids are used
to control fluid in hydraulic circuits. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor b - Correct Answer C. Both A and B
The charging light stays on while driving. Technician A says that a grounded wire near
the alternator could be the cause. Technician B says that a faulty circuit in the
instrument cluster could be the cause. Who is correct?
A. A only
B. B only
C. Both A and B
Systems Exam with Answers.
A resistance test was performed on an open toggle switch and the result is 5.857
megohms. Technician A says that the switch is faulty because the reading is beyond the
specifications. Technician B says that the switch has over 5 million ohms of resistance.
Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer B. B only
Which of the following conditions could cause the power locks to fail to operate?
A. Broken connector at the power lock switch
B. Closed power lock circuit breaker
C. An oversized fuse
D. An oversized wire repair in the power lock circuit - Correct Answer A. Broken
connector at the power lock switch
When using a 12 volt, unpowered test lamp to test for voltage, all of the following are
true EXCEPT:
A. The test lamp may be connected to the battery ground
B. The battery should first be disconnected
C. The test lamp may be connected to a chassis ground
D. The test lamp will not illuminate when probed into the circuit at a point after the load -
Correct Answer B. The battery should be disconnected
After removing a 30 amp circuit breaker from a fuse panel, a technician checks
continuity across its terminals with a digital multimeter (DMM). Technician A says that
the current from the ohmmeter will open the circuit breaker. Technician B says the
ohmmeter should read infinity if the circuit breaker is good. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer D. Neither A nor B
Technician A uses a test lamp to detect resistance. Technician B uses a jumper wire
when verifying the operation of circuit breakers, relays, and switches. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer B. B only
, Technician A says that a charge indicator light should come on with the key on, engine
off. Technician B states that if the indicator is not with the engine running, it can be
assumed that the charging system is functioning properly. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer A. A only
Technician A says that an amp clamp is a useful tool to use when checking for key-off
drain. Technician B says that a faulty rectifier bridge in the alternator could cause
excessive key-off drain. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer C. Both A and B
All of these conditions would cause the starter not to crank the engine EXCEPT:
A. the battery is not connected to the starter motor
B. The solenoid does not engage the starter drive pinion with the engine flywheel
C. The control circuit fails to switch the large-current circuit
D. The starter drive pinion fails to disengage from the flywheel - Correct Answer D. The
starter drive pinion fails to disengage from the flywheel
The stoplights are inoperative on a truck equipped with air brakes. Technician A says
that a faulty pressure switch could be the cause. Technician A says that a faulty
pressure switch could be the cause. Technician B says that a faulty hazard lamp switch
could be the cause. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer A. A only
Technician A says that a solenoid has a movable metallic plunger that creates linear
movement when the coil is energized. Technician B says that some solenoids are used
to control fluid in hydraulic circuits. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor b - Correct Answer C. Both A and B
The charging light stays on while driving. Technician A says that a grounded wire near
the alternator could be the cause. Technician B says that a faulty circuit in the
instrument cluster could be the cause. Who is correct?
A. A only
B. B only
C. Both A and B
