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WorksheetsEngine Repair 1
Total questions: 10
Worksheet time: 5mins
A vehicle has white-colored exhaust emitting from its tailpipe at all engine speeds. Which of the following is causing this white-colored exhaust?
Worn piston rings
leaking head gasket
worn valve guides
leaking fuel injector
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:
Late ignition or valve timing
normal condition
sticking valve or misfire
exhaust gas restriction
New crankshaft bearings are installed after the main bore of an engine block has been line bored. Which of the following is correct?
use oversized bearings
align oil hole in bearing to oil passage in block
worn bearings will increase oil pressure
both a and b
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
Technician A says that insufficient hydraulic lifter preload results in excessive valve train noise. Technician B says excessive hydraulic lifter preload results in a high intake manifold vacuum. Who is correct?
tech a
tech b
both
neither
A spark plug's electrode is covered with thick black carbon deposits. Which of the following is correct?
the engine has a vacuum leak
this is normal wear
the piston rings are worn
the fuel injector is leaking
One spark plug's ceramic insulator is longer than the others. Which of the following is correct?
spark plugs have different heat ranges
spark plugs are self cleaning
spark plug resistance can be measured with a DMM
all of the above
A vehicle with an eight-cylinder engine and a manual transmission has a knocking sound at the back of the engine whenever the engine is running. Which of the following is causing this noise?
worn timing belt
loose harmonic balancer
loose flywheel bolts
faulty power steering pump
The oil pressure switch on an engine may be faulty. All of the following are true about oil pressure switches EXCEPT:
test switch with a DMM
the warning lamp turns off as oil pressure rises
the sensor is a variable resistor
set the meter to ohms to measure continuity
During a cylinder leakage test, a hissing sound is heard coming from the throttle body. This sound indicates:
A bad exhaust valve
worn piston rings
bad intake valve
leaking head gasket
