CAA Automotive Systems and Parts 3

Question 1

What does an OBD-II diagnostic port allow an appraiser to check?

Accepted Answer

Stored trouble codes and readiness monitors

Answer

The OBD-II port provides access to stored diagnostic trouble codes and emissions readiness monitor status.

Question 2

OBD-II became mandatory on all new light-duty vehicles sold in the United States beginning with which model year?

Accepted Answer

1996

Answer

OBD-II was required on all U.S. cars and light trucks starting with the 1996 model year.

Question 3

Which component in an automatic transmission transfers engine power to the transmission through fluid coupling?

Accepted Answer

Torque converter

Answer

The torque converter uses transmission fluid to couple the engine to the transmission and multiply torque.

Question 4

Dark brown transmission fluid with a burnt smell found during an appraisal inspection typically indicates what?

Accepted Answer

Overheated or degraded fluid and possible internal wear

Answer

Healthy ATF is usually red or pink; dark, burnt-smelling fluid signals overheating and likely internal wear.

Question 5

A milky, light-brown substance on the underside of the oil filler cap most likely indicates which problem?

Accepted Answer

Coolant mixing with engine oil

Answer

A milkshake-like residue usually means coolant is contaminating the oil, often from a head gasket or cracked head.

CAA - Certified Automotive Appraiser Practice Test