| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.78 |
| Score | 0% | 56% |
What does the timing belt do?
synchronizes the cam and the camshaft |
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calibrates the speedometer |
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synchronizes the camshaft and the crankshaft |
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synchronizes each piston to the crankshaft |
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.
Opposed cylinder designs feature two rows of cylinders that are placed at what angle to each other?
45° |
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180° |
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90° |
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270° |
Opposed cylinder designs place cylinders flat in two rows 180° opposite each other with a single crankshaft running between them.
The intake ports on the cylinder heads is fed outside air via the:
intake control module |
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intake manifold |
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intake air pump |
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intake pressure regulator |
The intake manifold distributes outside air to the intake ports on the cylinder heads. The intake air filter removes any airborne contaminants before the air enters the engine.
__________ results from oil buildup in the combustion chamber.
detonation |
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preignition |
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engine knock |
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combustion |
Preignition results from the buildup of fuel deposits and/or oil in the combustion chamber. These deposits increase chamber pressure and reduce heat tranfer to the coolant. The trapped heat then raises the temperature of the air-fuel mix to the point that it combusts before ignition.
Another name for the powertrain control module is the __________ control unit.
electrical |
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engine |
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transmission |
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universal |
The main computer or powertrain control module (PCM) uses pre-programmed software to analyze the input received from sensors and produce output signals to adjust vehicle performance and operation. (Engine control unit (ECU) is another name for the PCM.)