ASVAB Automotive Information Practice Test 884477 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.03
Score	0%	61%

Review

For inline cylinder arrangements in an engine, how are the cylinders numbered?

50% Answer Correctly

	sequentially from the front of the engine to the back
	alternating from the back of the engine to the front
	sequentially from the back of the engine to the front
	alternating from the front of the engine to the back

Solution

Inline cylinder arrangements number cylinders sequentially (1, 2, 3, ...) front to rear.

__________ are made with wide gap coils of rigid steel cable and both hold the vehicle chassis up off the ground and absorb energy from wheel movement making for a smoother ride.

67% Answer Correctly

	suspension springs
	ignition coils
	shock absorbers
	control arms

Solution

Suspension springs are made with wide gap coils of rigid steel cable and both hold the vehicle chassis up off the ground and absorb energy from wheel movement making for a smoother ride.

Both intake and exhaust valves are closed as the piston begins moving back up from the bottom of the cylinder, compressing the air-fuel mixture in the combustion chamber which also makes it hotter. This describes which engine stroke?

73% Answer Correctly

	power
	intake
	compression
	exhaust

Solution

During the compression stroke, both intake and exhaust valves are closed as the piston begins moving back up from the bottom of the cylinder (bottom dead center or BDC). This compresses the air-fuel mixture in the combustion chamber which also makes it hotter.

Ignition timing is measured in number of degrees:

59% Answer Correctly

	before bottom dead center
	after top dead center
	after bottom dead center
	before top dead center

Solution

Ignition timing defines the point in time at the end of the compression stroke that the spark plug fires. Measured in number of degrees before top dead center (BTDC), the exact point that the spark plugs initiate combustion varies depending on the speed of the engine. The timing is advanced (the spark plugs fire a few more degrees BTDC) when the engine is running faster and retarded when it's running slower.

Which of the following is not a function of antifreeze?

54% Answer Correctly

	raises the boiling point of water
	keeps water from freezing at low temperatures
	aids heat transfer
	lubricates the cooling system

Solution

Modern car engines are cooled by liquid which circulates through the engine block and cylinder heads absorbing excess heat. This liquid is made up of half water and half antifreeze (commonly, ethylene glycol) which both keeps the water from freezing at low temperatures and raises its boiling point making heat transfer more efficient.