| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.91 |
| Score | 0% | 58% |
For inline cylinder arrangements in an engine, how are the cylinders numbered?
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 back of the engine to the front |
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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.
A vehicle's lighting system is protected from current spikes by:
the battery |
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the alternator |
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the voltage regulator |
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fuses and circuit breakers |
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.
The fuel injector is regulated by the __________ which is the main computer that controls engine and transmission functions.
powertrain control module |
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vehicle control module |
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transmission control module |
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computer 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.
Which of the following is not a function of antifreeze?
aids heat transfer |
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keeps water from freezing at low temperatures |
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raises the boiling point of water |
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lubricates the cooling system |
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.
Which of the following regulates the flow of coolant through the radiator?
crankshaft |
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water jacket |
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thermostat |
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water pump |
The thermostat controls coolant (and, through it, engine) temperature by regulating the flow of coolant through the radiator. A bypass tube allows coolant to bypass the radiator and flow back into the water pump when its temperature is low enough that the thermostat is closed.