Engine Repair 1

Front

A vehicle has white-colored exhaust emitting from its tailpipe at all engine speeds. What is causing this white-colored exhaust?

Back

leaking head gasket

Front

A vacuum gauge is connected to a port on the intake manifold of an engine with poor performance. The needle on the gauge fluctuates between 15 "hg and 20 "hg vacuum at idle. This vacuum gauge reading indicates:

Back

sticking valve or misfire

Front

New crankshaft bearings are installed after the main bore of an engine block has been line bored. Which of the following is correct?

Back

All the above: use oversized bearings, align oil hole in bearing to oil passage in block, worn bearings will increase oil pressure.

Front

A cylinder power balance test indicates two adjacent cylinders are underperforming. All of the following will cause this problem EXCEPT:

• a faulty fuel injector
• crossed ignition wire
• cracked cylinder heads
• a faulty head gasket

Back

a faulty fuel injector

Front

Who is correct regarding hydraulic lifter preload and its effects on valve train noise and intake manifold vacuum?

Back

tech a

Front

A spark plug's electrode is covered with thick black carbon deposits. What does this indicate?

Back

the piston rings are worn

Front

During a cylinder leakage test, a hissing sound is heard coming from the throttle body. This sound indicates:

Back

bad intake valve

Front

What is the effect of a fouled spark plug on engine performance?

Back

It can cause the engine to run rough or misfire

Front

What is the primary purpose of a turbocharger in an engine?

Back

To increase engine power by forcing more air into the combustion chamber

Front

When replacing a head gasket, it's crucial to:

Back

Torque the head bolts to the manufacturer's specifications.