ASE Electrical/Electronic Systems 3

Question 1

When measuring resistance with an ohmmeter, the circuit must be:

Accepted Answer

De-energized (power off)

Answer

An ohmmeter supplies its own current, so applied voltage will give false readings or damage the meter.

Question 2

A magnetic-reluctance (variable reluctance) wheel speed sensor produces what type of signal?

Accepted Answer

AC sine-wave voltage

Answer

A passive reluctance sensor generates an AC voltage whose frequency and amplitude rise with wheel speed.

Question 3

Two 6-ohm resistors wired in series produce a total resistance of:

Accepted Answer

12 ohms

Answer

Series resistances add directly, so 6 + 6 = 12 ohms.

Question 4

A customer reports dim headlights and slow cranking. Which test should be performed first?

Accepted Answer

Battery state-of-charge and load test

Answer

Dim lights and slow cranking point to the battery, so testing its charge and capacity comes first.

Question 5

What is the purpose of a pull-up resistor in an electronic circuit?

Accepted Answer

To set a default high voltage on a signal line

Answer

A pull-up resistor ensures a signal line reads a defined high state when not actively driven low.

ASE Practice Test