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WorksheetsEngine test quiz 1
Total questions: 20
Worksheet time: 7mins
Cylinder leakage is measured when the piston is at __________.
TDC
BDC
In the middle of the cylinder
3/4 to the top of the cylinder
A coolant leak would emit _____________ smoke from the exhaust.
blue
white
black
green
An engine has a fast cranking sound, what could possibly be the issue?
bad starter motor
high compression
bad spark plug
broken timing belt or timing chain
During a vacuum test on an engine, a technician gets a low, but steady reading. What could be a potential issue?
failed catalytic converter
late ignition timing
failed piston rings
burned valve
During a cylinder leakage test, air can be heard escaping from the tailpipe. What could cause this?
This is normal for most engines
Intake valve is bent
Exhaust valve seat failure
intake valve seat failure
What kind of issue could be found in a WET compression test?
Worn piston ring
hole in the piston
worn valve
worn camshaft
The Unit of measure for a compression tester or cylinder leakage tester is:
psi
kPa
both psi and kPa
none of the above
Name the item in the picture:
Gas Cap
Radiator Pressure Cap
Water Pump
Thermostat
What direction is the piston traveling during the Power-Stroke?
Up
Down
Left
Right
During a leak-down test you see bubbles in the coolant reservoir. What is the most likely cause?
Damaged piston ring
Damaged head gasket
Damaged exhaust valve
Damaged intake valve
A car uses a four-stroke engine.
The four strokes are:
intake, compression, combustion and exhaust
injection, rotation, combustion and exhaust
injection, carburetion, rotation and exhaust
A Timing belt or Timing chain links these two components together so that the valves are in sync with the pistons:
the flywheel to the camshaft
the crankshaft to the camshaft
the cylinder head to the camshaft
There are three Basic failures that can happen in an engine:
incorrect Fuel/Air mix, lack of compression and...
lack of exhaust
lack of water
lack of spark
There are three Basic failures that can happen in an engine:
bad fuel mix, lack of compression and...
lack of exhaust
lack of water
lack of spark
During a running vacuum test at idle the gauge needle was fluctuating rapidly between a normal and lower than normal reading. The cause is likely:
An ignition related misfire.
A compression misfire.
An air/ fuel related misfire.
All of the above.
During a cylinder leak down test ten percent of the air is heard escaping from the engine crankcase, this is normally caused by:
Cracked cylinder head.
Cracked cylinder head gasket.
The piston ring end gaps.
All of the above.
A cranking compression test will test all sealing points of the cylinder and piston.
True
False
Engine vacuum at idle should be:
Tested with the transmission in drive.
Always tested with the IAC disconnected.
At the correct idle speed and between 18 and 21 in. hg.
Higher than at 2500 RPM.
