ASE Practice Test (A6: Electrical/Electronic Systems)

Question 1

A circuit has a specified voltage drop of no more than 0.5 volts across a switch. The measured drop is 1.8 volts with the circuit loaded. This indicates:

Accepted Answer

Excessive resistance in the switch contacts

Answer

Normal reading for a high-current circuit

Answer

A short circuit to ground in the switch

Answer

Incorrect meter polarity during testing

Question 2

A technician is testing a blower motor circuit. The motor runs slowly at all speeds. Using a voltmeter, full battery voltage is present at the motor connector with the switch in HIGH position. The MOST likely cause is:

Accepted Answer

High resistance in the ground circuit

Answer

Faulty blower speed resistor

Answer

Incorrect fuse rating in the circuit

Answer

Open circuit in the blower relay

Question 3

When using an oscilloscope to test a crankshaft position sensor, the waveform shows a missing tooth pattern. This is:

Accepted Answer

Normal — the missing tooth is a reference gap for TDC

Answer

A sign of sensor failure requiring replacement

Answer

Evidence of electrical interference on the signal wire

Answer

Caused by excessive air gap between sensor and reluctor

Question 4

A vehicle has an inoperative power window on the right rear door only. All other windows work normally. The MOST efficient first test would be:

Accepted Answer

Check for battery voltage and ground at the right rear window motor

Answer

Replace the right rear window regulator motor

Answer

Test the master switch on the driver's door

Answer

Inspect the body control module for fault codes

Question 5

A diode in an alternator rectifier bridge is shorted. This will MOST likely cause:

Accepted Answer

AC ripple voltage to appear on the DC output

Answer

The alternator to produce no output voltage

Answer

The battery to overcharge above 15.5 volts

Answer

Excessive field current draw

Question 6

Technician A says a parasitic draw test should be performed with all doors closed and the vehicle in sleep mode. Technician B says a draw of 35 milliamps is acceptable on most modern vehicles. Who is correct?

Accepted Answer

Both Technician A and Technician B

Answer

Technician A only

Answer

Technician B only

Answer

Neither Technician A nor Technician B