| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.92 |
| Score | 0% | 58% |
A vehicle's lighting system is protected from current spikes by:
the voltage regulator |
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the alternator |
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fuses and circuit breakers |
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the battery |
The lighting system consists of interior lights, instrument panel lighting, headlights, and taillights. Like household electrical circuits, the vehicle's lighting system is protected from current spikes by fuses and circuit breakers.
Ignition timing is measured in number of degrees:
before top dead center |
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before bottom dead center |
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after bottom dead center |
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after top dead center |
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.
For inline cylinder arrangements in an engine, how are the cylinders numbered?
sequentially from the back of the engine to the front |
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alternating from the back of the engine to the front |
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alternating from the front of the engine to the back |
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sequentially from the front of the engine to the back |
Inline cylinder arrangements number cylinders sequentially (1, 2, 3, ...) front to rear.
The __________ converts pressure on the brake pedal to hydraulic pressure in the brake lines.
brake cylinder |
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brake knuckle |
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master cylinder |
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brake linkage |
The master (brake) cylinder converts pressure on the brake pedal to hydraulic pressure in the brake lines.
Which of the following is not a function of antifreeze?
lubricates the cooling system |
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keeps water from freezing at low temperatures |
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aids heat transfer |
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raises the boiling point of water |
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.