Diesel Tech ASE Practice Test 1 Electrical/Electronic Systems Questions and Answers

Diesel Tech ASE Practice Test 1 Electrical/Electronic Systems Questions and 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 - Ans:-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 ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 2/19 D. An oversized wire repair in the power lock circuit - Ans:-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 - Ans:-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 - Ans:-D. Neither A nor B ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 3/19 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 - Ans:-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 - Ans:-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 ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 4/19 B. B only C. Both A and B D. Neither A nor B - Ans:-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 - Ans:-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