Deck 23: Engine Mechanical Testing and Service

Question 1

All of the following are considered routine engine maintenance services except:

A)Timing belt replacement
B)Valve lash adjustment
C)Head gasket replacement
D)Oil pan gasket replacement

Answer 1

C

Question 2

A gasoline engine has noticeably poor performance, lack of power, and poor fuel economy. Technician A says a power balance test should be performed.Technician B says a combustion leakage test should be performed.Who is correct?

A)Technician A
B)Technician B
C)Both A and B
D)Neither A nor B

Answer 2

A

Question 3

A gasoline engine is producing large amounts of blue smoke from the exhaust.Which of the following is most likely?

A)The fuel system is delivering too much fuel
B)Oil pressure is too high
C)The oil rings are worn
D)Coolant is entering the combustion chamber

Answer 3

C

Question 4

An engine with excessive amounts of ........smoke from the exhaust may have a problem with a fuel injector.

Question 5

To perform a ........test, a scan tool may be required to disable the fuel injectors.

Question 6

To perform a wet compression test, ........is squirted into the cylinder.

Question 7

An engine is not running well with a lack of power and a rough idle.Technician A says a running compression test should be performed first on all cylinders.Technician B says a cylinder leakage test should be performed on all cylinders.Who is correct?

A)Technician A
B)Technician B
C)Both A and B
D)Neither A nor B

Question 8

A hissing sound can be heard in the engine compartment with the engine idling.Which is the most likely cause?

A)Incorrect valve lash
B)Low oil pressure
C)Vacuum leak
D)Exhaust leak

Question 9

A cylinder leakage test can be used to find leaking ........and valves.

Question 10

Many technicians perform a ........compression test using an inductive amp clamp and a scope.