Diesel Tech ASE Practice Test 1
Electrical/Electronic Systems Exam Q&A
100% Correct Answers | Already Graded
A+
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 - ✔✔B. B only
Which of the following conditions could cause the power locks to fail to
operate?
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
,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 - ✔✔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 - ✔✔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?
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, A. A only
B. B only
C. Both A and B
D. Neither A nor B - ✔✔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 - ✔✔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
3
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
Electrical/Electronic Systems Exam Q&A
100% Correct Answers | Already Graded
A+
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 - ✔✔B. B only
Which of the following conditions could cause the power locks to fail to
operate?
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
,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 - ✔✔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 - ✔✔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?
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, A. A only
B. B only
C. Both A and B
D. Neither A nor B - ✔✔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 - ✔✔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
3
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
