ASE - Automotive Service Excellence Practice Test #2 1

Question 1

A technician is diagnosing a no-start condition on a gasoline engine. The engine cranks normally but will not fire. Spark is confirmed at all cylinders. What should be tested NEXT?

Accepted Answer

Fuel pressure at the rail

Answer

Ignition coil primary resistance

Answer

Crankshaft position sensor signal

Answer

Throttle position sensor voltage

Question 2

A customer reports that the brake pedal slowly sinks to the floor when held at a stop, but brake performance otherwise feels normal. What is the MOST likely cause?

Accepted Answer

Internal leak in the master cylinder

Answer

Air in the brake lines

Answer

Worn front brake pads

Answer

Stuck brake caliper piston

Question 3

When measuring battery voltage with a digital multimeter on a fully charged 12-volt automotive battery at rest (no load), what reading should the technician expect?

Accepted Answer

12.6 – 12.8 V

Answer

11.8 – 12.0 V

Answer

12.2 – 12.4 V

Answer

13.5 – 14.5 V

Question 4

A rear-wheel drive vehicle pulls strongly to the right during braking. All four tires are properly inflated. What is the MOST likely cause?

Accepted Answer

A sticking left front brake caliper

Answer

A seized right rear wheel bearing

Answer

Worn rear shock absorbers

Answer

A loose right front strut mount

Question 5

While performing a cooling system pressure test, the technician pressurizes the system to the cap rating and observes the gauge slowly dropping over five minutes with no visible external leaks. What is the MOST likely cause?

Accepted Answer

A leaking intake manifold gasket or head gasket

Answer

A faulty radiator cap

Answer

A cracked coolant reservoir

Answer

A weak water pump impeller

Question 6

A technician uses an OBD-II scanner and finds a P0420 code — Catalyst System Efficiency Below Threshold (Bank 1). What is the MOST accurate interpretation of this code?

Accepted Answer

The catalytic converter is not reducing tailpipe emissions efficiently enough

Answer

The upstream oxygen sensor has failed

Answer

There is a rich fuel condition upstream of the converter

Answer

The downstream oxygen sensor signal is too high