| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.74 |
| Score | 0% | 55% |
What does the timing belt do?
synchronizes the camshaft and the crankshaft |
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synchronizes each piston to the crankshaft |
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synchronizes the cam and the camshaft |
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calibrates the speedometer |
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.
The fuel pressure regulator ensures that the fuel injectors receive fuel at a consistent and known rate. The fuel pressure regulator is part of the:
fuel rail |
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fuel filter |
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electric fuel pump |
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fuel manifold |
The electric fuel pump feeds pressurized fuel through a fuel filter to the fuel injectors via the fuel rail manifold. The fuel rail contains the fuel pressure regulator which ensures that the fuel injectors receive fuel at a consistent and known rate. Excess fuel bled off by the pressure regulator returns to the fuel tank through the fuel return line.
For inline cylinder arrangements in an engine, how are the cylinders numbered?
sequentially 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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alternating 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 function of the oil pan?
acts as the engine oil reservoir |
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screens debris from oil |
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cools engine oil |
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feeds the oil pump |
The oil pan contains the engine oil reservoir of from four to six quarts of oil and feeds the oil pump through the oil pickup tube. An oil strainer floats at the top of the oil in the oil pan and screens debris from the oil before feeding it to the oil pump.
Too much air results in a __________ air-fuel mixture that burns more slowly and hotter.
light |
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heavy |
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rich |
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lean |
The stoichiometric ratio defines the proper ratio of air to fuel necessary so that an engine burns all fuel with no excess air. For gasoline fuel, the stoichiometric ratio is about 14.7:1 or for every one gram of fuel, 14.7 grams of air are required. Too much air results in a lean air-fuel mixture that burns more slowly and hotter while too much fuel results in a rich mixture that burns quicker and cooler.