ASE Entry level Electrical PR. 1

Front

All of these types of headlights are found on today's vehicle's EXCEPT for: conventional sealed beams headlamps, composite sealed beams headlamps, Xenon headlamps, LED headlamps

Back

conventional sealed beams headlamps

Answer explanation

Conventional sealed beams have all but been replaced by the other types of headlamps listed in this question.

Front

Which of these is most useful for first diagnosing vehicles with multiplex (networked) electrical systems? A. A voltmeter, B. An oscilloscope, C. A logic probe, D. A scan tool

Back

A scan tool

Answer explanation

A scan tool is most useful for diagnosing vehicles with multiplex electrical systems as it can read and interpret data from various control modules, helping to identify issues in the networked system effectively.

Front

The fault shown in the above circuit is:

Back

a short to ground

Answer explanation

The fault in the circuit is identified as a short to ground, which occurs when a conductive path connects a circuit directly to the ground, bypassing the intended load and causing excessive current flow.

Front

An air bag system is being serviced. Technician A says to disconnect the yellow SRS connectors at the front of the vehicle. Technician B says to disconnect and isolate the negative battery cable. Who is right?

Back

Technician B only

Answer explanation

Technician B is correct because disconnecting the negative battery cable is essential for safety when servicing an airbag system. Technician A's action is not sufficient on its own. Always disconnect the negative battery cable and wrap with tape so contact cannot be made. Follow the specific vehicle's disarming instructions, as some SRS system can retain backup power for an additional period of time.

Front

When testing computer-controlled systems, a digital multimeter should be used with an input impedance of at least:

Back

10 megohms

Answer explanation

A digital multimeter with at least 10 megohms input impedance minimizes loading effects on the circuit being tested, ensuring accurate measurements in computer-controlled systems.

Front

When troubleshooting a slow drain on the battery, which of these diagnostic tools should be used? Ohmmeter, Ammeter, Voltmeter, Test light

Back

Ammeter

Answer explanation

An ammeter is used to measure current flow, making it ideal for diagnosing a slow drain on the battery. It helps identify if there is excessive current draw, which can indicate a problem in the electrical system.

Front

While testing a starting circuit on a 5.7L V8 engine, the technician finds that the engine cranks slowly. The starter current draw is 90 amps, and the battery voltage while cranking is 11 volts. What should the technician do next?

Back

Check for voltage drop of the starter motor circuit.

Answer explanation

Checking for voltage drop in the starter motor circuit is crucial, as a significant drop can indicate poor connections or wiring issues, which could cause the slow cranking. This step helps isolate the problem before considering other options.

Front

Who is right about the causes of a noisy alternator: Technician A (bad diode) or Technician B (worn bearing)?

Back

Both A and B

Answer explanation

Both technicians are correct. A noisy alternator can result from a bad diode, which affects electrical output, or from a worn bearing, which causes mechanical noise. Therefore, both A and B are valid explanations.

Front

The analog ohmmeter needle does not move when connected as shown above. This indicates that the rotor winding is:

Back

open

Answer explanation

The analog ohmmeter needle not moving indicates no current flow. This suggests the rotor winding is open, meaning there is a break in the circuit, preventing continuity.

Front

A vehicle’s turn signals flash too slowly. Technician A claims that the condition could be caused by a faulty flasher. Technician B says that a bulb may be the wrong type. Who is right?

Back

Both A and B

Answer explanation

Both technicians are correct. A faulty flasher can cause slow flashing, and using the wrong type of bulb can also affect the turn signal's operation. Therefore, both A and B are valid explanations for the issue.