| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.79 |
| Score | 0% | 56% |
Ignition timing defines the point in time at the end of the compression stroke that which of the following happens?
spark plugs fire |
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the air-fuel mixture enters |
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exhaust valve opens |
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intake valve opens |
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.
Opposed cylinder designs feature two rows of cylinders that are placed at what angle to each other?
270° |
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180° |
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45° |
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90° |
Opposed cylinder designs place cylinders flat in two rows 180° opposite each other with a single crankshaft running between them.
Another name for a reciprocating engine is a(n):
external combustion engine |
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piston engine |
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internal combustion engine |
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cylinder engine |
A reciprocating engine is an engine whose crankshaft is turned by pistons moving up and down in a cylinder.
What function does a two-stroke cycle engine perform on the second stroke?
combustion and exhaust |
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fuel intake and compression |
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fuel intake and exhaust |
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compression and combustion |
The two strokes of a two-stroke cycle engine are fuel intake and compression then combustion and exhaust.
What combines the suspension spring and shock absorber into one unit?
knuckle |
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wheel hub |
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wheel cylinder |
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strut |
Because a compressed spring will extend violently, shock absorbers must be used to dampen the spring’s compression and extension cycles. Struts combine the spring and shock into one unit