| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.16 |
| Score | 0% | 63% |
Which of the following is the correct order for the engine stroke cycle?
intake, power, compression, exhaust |
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compression, intake, power, exhaust |
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power, intake, compression, exhaust |
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intake, compression, power, exhaust |
The stroke cycle order is intake stroke, compression stroke, power stroke, exhaust stroke.
Ignition timing defines the point in time at the end of the compression stroke that which of the following happens?
intake valve opens |
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spark plugs fire |
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exhaust valve opens |
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the air-fuel mixture enters |
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.
What type of energy does an automotive battery produce?
direct current |
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rotational energy |
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chemical energy |
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alternating current |
An automotive battery produces direct current for use by automotive systems.
Which of the following regulates the opening and closing of the intake and exhaust valves in each cylinder in time with the motion of the piston?
camshaft |
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halfshaft |
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connecting arm |
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crankshaft |
The camshaft is linked to the crankshaft through a timing belt and regulates the opening and closing of the intake and exhaust valves in each cylinder in time with the motion of the piston. An engine designated OverHead Camshaft (OHC) locates the camshaft in the cylinder head. An engine with Double OverHead Camshaft (DOHC) has two camshafts, one to regulate the intake valves and one to regulate the exhaust valves.
For inline cylinder arrangements in an engine, how are the cylinders numbered?
alternating from the front of the engine to the back |
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sequentially from the front of the engine to the back |
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alternating from the back of the engine to the front |
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sequentially from the back of the engine to the front |
Inline cylinder arrangements number cylinders sequentially (1, 2, 3, ...) front to rear.