| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.87 |
| Score | 0% | 57% |
Which of the following is not a function of a car battery?
acts as a supplemental source of energy to moderate engine performance |
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delivers current to the ignition system to start the engine |
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delivers supplemental current when the alternator can't handle high electrical system loads |
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acts as an electrical reservoir for excessive current |
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.
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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sequentially 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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alternating from the front of the engine to the back |
Inline cylinder arrangements number cylinders sequentially (1, 2, 3, ...) front to rear.
Which of the following is not a component in the engine lubrication system?
pickup tube |
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differential |
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pressure relief valve |
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oil filter |
In engine lubrication, oil remains in the oil pan until the engine is turned on. It then gets sucked up the pickup tube by the oil pump and pressurized. This pressure is moderated by the pressure relief valve and the oil is fed through the oil filter into the engine to lubricate it.
Ignition timing is measured in number of degrees:
after bottom dead center |
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before top dead center |
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before bottom dead center |
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after top dead center |
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 is not a characteristic of disc brakes?
uses brake shoes |
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uses a rotor |
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uses brake pads |
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newer brake system |
Both drum brake and disc brake assemblies use friction to stop a car's wheels from turning but each do it in a slightly different way. A drum brake assembly uses a large iron drum attached to the wheel and brake shoes that press against the drum to slow the rotation of the drum and, consequently, the wheel. A disc brake assembly employs friction in the same way as a drum brake but instead uses a rotor, also attached to the wheel, and two brake pads that squeeze against the surface of the rotor.