| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.19 |
| Score | 0% | 64% |
What links each piston to the engine's crankshaft?
connecting rod |
|
cylinder arm |
|
halfshaft |
|
piston ring |
A connecting rod employs a wrist pin to link each piston to the engine's crankshaft.
The primary purpose of the muffler is to:
remove harmful gases from the exhaust |
|
cool the exhaust |
|
reclaim unburned fuel |
|
quiet exhaust |
The muffler follows the catalytic converter and absorbs sound to help quiet load exhaust. It is followed by the exhaust pipe which is the final exit point for exhaust gas from the vehicle.
Which of the following is the result of combustion being initiated by a source other than the spark plug?
detonation |
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pre-ignition |
|
ignition |
|
pre-combustion |
Normal combustion in an engine is initiated by a spark plug and results in the complete burning of the air-fuel mixture. If combustion is initiated by a source other than the spark plug, by a hot spot in the cylinder or combustion chamber for example, pre-ignition results. Detonation results if the air-fuel mixture explodes instead of burning. Detonation can cause extremes in pressure in the combustion chamber leading to engine damage.
What type of energy does an automotive battery produce?
rotational energy |
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alternating current |
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direct current |
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chemical energy |
An automotive battery produces direct current for use by automotive systems.
Engines with radial cylinder configurations are most common in:
aircraft engines |
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heavy truck engines |
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tank engines |
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train engines |
A radial arrangement places cylinders in a circle around the crankshaft and is used almost exclusively in aircraft engines.