NAPA Manual Drivetrain and Axles 2

Question 1

A hydraulic clutch pedal slowly sinks to the floor when held down at a stop, and the clutch begins to drag. What is the most likely cause?

Accepted Answer

Internal leak past the master cylinder primary seal

Answer

Fluid bypassing the master cylinder seal lets pressure bleed off, so the pedal sinks and the clutch stops releasing fully.

Question 2

A customer reports clutch chatter when accelerating from a stop. Which condition is LEAST likely to cause it?

Accepted Answer

Insufficient clutch pedal free play

Answer

Too little free play usually causes slipping and early release bearing wear, not chatter.

Question 3

Engine RPM rises quickly during hard acceleration in high gear, but vehicle speed barely increases. Technician A says the disc may be worn to the rivets. Technician B says the pedal may have no free play. Who is correct?

Accepted Answer

Both A and B

Answer

A worn-out disc and a release system that never fully lets go of the pressure plate both cause slipping.

Question 4

A chirping or squealing noise appears only when the clutch pedal is fully depressed with the engine running. What is the most likely cause?

Accepted Answer

Failing pilot bearing or bushing

Answer

With the pedal depressed, the input shaft is stopped while the crankshaft keeps turning, which loads the pilot bearing.

Question 5

Before reusing a flywheel during a clutch replacement, which check matters most?

Accepted Answer

Lateral runout and surface condition

Answer

Excessive runout or a damaged surface causes chatter and uneven disc wear, so the flywheel must be measured and resurfaced or replaced as needed.

NAPA - National Automotive Parts Association Certified Mechanic Practice Test

NAPA - National Automotive Parts Association Certified Mechanic Practice Test

NAPA Manual Drivetrain and Axles 2