| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.85 |
| Score | 0% | 57% |
What does the timing belt do?
synchronizes each piston to the crankshaft |
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synchronizes the cam and the camshaft |
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synchronizes the camshaft and the crankshaft |
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calibrates the speedometer |
Maintaining proper synchronization between the rotation of the camshaft and the rotation of the crankshaft is critical to ensure that the engine's valves open and close at the proper times during each cylinder's intake and exhaust strokes.
What is the function of the alternator?
replaces the electrical energy that the car draws from the battery |
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converts motion from the wheels into DC power |
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provides AC power for the car's electrical components |
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charges the battery when the car is not running |
An automobile's electrical system runs on DC power and the bulk of that power is supplied by the battery. The alternator converts the motion of the rotor into AC power which is then fed through the rectifier to convert it to DC power that both the car and the battery can use.
Another name for a reciprocating engine is a(n):
piston engine |
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internal combustion engine |
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cylinder engine |
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external combustion engine |
A reciprocating engine is an engine whose crankshaft is turned by pistons moving up and down in a cylinder.
Just before the piston reaches top dead center, the spark plug fires and ignites the compressed air-fuel mixture. This describes which engine stroke?
compression |
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intake |
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power |
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exhaust |
During the power stroke, just before the piston reaches top dead center, the spark plug fires and ignites the compressed air-fuel mixture. The resulting expansion due to combustion pushes the piston back down the cylinder toward bottom dead center.
The fuel injector is regulated by the __________ which is the main computer that controls engine and transmission functions.
vehicle control module |
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powertrain control module |
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computer control module |
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transmission control module |
The fuel injector sprays fuel into the air stream that's being fed into the cylinder head via the intake valve. The timing and amount of fuel are regulated by the powertrain control module (PCM) which is the main computer that controls engine and transmission functions.