ASE Quiz
Which of the following creates a flapping sound near the front of the engine?
A. Timing belt tension too tight
B. Drive belt too tight
C. Drive belt too loose
D. Timing belt tension too loose
An engine noise sounds like a knock at the side of the engine that is louder when the engine is cold and goes away or is reduced when the engine reaches operating temperature. Which of the following is the MOST likely cause?
A. Cam bearing
B. Main bearing
C. Piston slap
D. Wrist pin
All of the following are reasons why you must disable the fuel injection system and ignition system when conducting an engine compression test, EXCEPT:
A. Prevents damage to the ignition system during the test
B. Prevents fuel injection into the cylinders
C. Prevents a shop engine fire
D. Prevents inaccurate readings
A power balance test is being performed on an engine. Technician A says to note the engine RPM before and during the test for each cylinder. Technician B says to record the RPM drop for each cylinder. Who is right?
A. A only
B. B only
C. Both A and B
D. Neither A not B
What engine seal is pictured?
A. Rear main
B. Camshaft plug
C. Throttle valve
D. Valve
Technician A says the closed coil end of a valve spring should go against the cylinder head. Technician B says all valve springs use shims to control free spring height. Who is right?
A. A only
B. B only
C. Both A and B
D. Neither A nor B
All of the following statements are correct when adjusting valve lash on engines with overhead camshaft cylinder heads, EXCEPT:
A. Shims may be used to make adjustments.
B. Clearance is measured between the camshaft and follower or rocker on most engines.
C. The follower or rocker must be on the base circle of the camshaft when measuring.
D. The engine must be cold for all engine manufacturers
The surface of the cylinder head has just been machined. What will have to be done to the valve train?
A. Lengthening the push rods
B. Increasing valve spring tension
C. Grinding the valve stems
D. Shim the head
A technician hears a knock or thumping at the side of the engine block that is louder when the engine is hot and goes away when the affected cylinder is shorted out. Which of the following could be the cause?
A. Main bearing
B. Wrist pin
C. Rod bearing
D. Piston slap
An engine is making a knocking sound that changes with RPM, and the noise disappears while a cylinder is being tested during the cylinder balance test. Which of the following could be the cause?
A. Rod bearing
B. Main bearing
C. Piston Slap
D. Burnt valve
Technician A says old antifreeze may cause corrosion build-up in the cooling system. Technician B says some original equipment manufacturers (OEM) recommend that the coolant be changed at specified intervals. Who is right?
A. A only
B. B only
C. Both A and B
D. Neither A nor B
Which of the following steps is LEAST likely to be necessary when refilling a cooling system?
A. Bleeding the air out of the system
B. Mixing tap water and distilled water
C. Mixing the proper ratio of water to coolant
D. Check the radiator cap for proper fit
A technician is using a laptop computer and manufacturer software to test the ECT (Electronic Controlled Throttle) circuit that has a stored DTC P1121 (Electric Throttle Control Actuator). Which of the following customer concerns could be caused by a defective ECT return spring malfunction?
A. Rough idle
B. Low power
C. High idle
D. Detonation
Technician A says the voltage required maintaining spark is referred to as the spark line and the duration of the spark line is based on total primary circuit resistance and coil voltage available. Technician B says problems with the burning (called fuel propagation) will show up within the spark line. Who is right?
A. A only
B. B only
C. Both A and B
D. Neither A nor B
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