| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.12 |
| Score | 0% | 62% |
What links each piston to the engine's crankshaft?
halfshaft |
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connecting rod |
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piston ring |
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cylinder arm |
A connecting rod employs a wrist pin to link each piston to the engine's crankshaft.
Which of the following is not a function of a car battery?
acts as an electrical reservoir for excessive current |
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delivers current to the ignition system to start the engine |
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acts as a supplemental source of energy to moderate engine performance |
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delivers supplemental current when the alternator can't handle high electrical system loads |
The lead-acid battery is the core of the electrical system, providing current to the ignition system to start the engine as well as delivering supplemental current when the alternator can't handle high electrical system loads and acting as an electrical reservoir for excessive current.
Ignition timing defines the point in time at the end of the compression stroke that which of the following happens?
exhaust valve opens |
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intake valve opens |
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spark plugs fire |
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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.
Which of the following statements about an inline cylinder configuration is false?
cylinders are configured in a single row |
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increases the length of the engine |
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cylinders can be completely vertical or slanted |
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works well in eight cylinder engines |
An inline cylinder configuration places the cylinders in a single row either completely vertical or slanted. Due to this arrangement, an inline cylinder configuration makes the engine longer and, although it works well in four cylinder engines, performace suffers in larger engines due to the difficulty in evenly distributing the air-fuel mixture over the length of the engine.
Which of the following statements about v-type cyllinder arrangement is false?
has two rows of cylinders |
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has an odd number of cylinders |
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engine is shorter than an inline engine |
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common in motorcycles, cars, and trucks |
A v-arrangement has two rows of cylinders in a V-shaped block with a crankshaft at the bottom of the V. Any even number of cylinders is possible in this configuration from the V-2 that's commonly used in motorcycles up to V-12 or bigger for large trucks. The V design produces a shorter engine than an in-line cylinder configuration and allows for better air-fuel distribution.