| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.20 |
| Score | 0% | 64% |
The catalytic converter output consists primarily of:
oxygen |
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water and carbon dioxide |
|
gasoline |
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carbon monoxide |
The catalytic converter converts pollutants in exhaust gas into less pollutant substances like carbon dioxide and water.
What does the timing belt do?
calibrates the speedometer |
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synchronizes each piston to the crankshaft |
|
synchronizes the camshaft and the crankshaft |
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synchronizes the cam and the camshaft |
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.
Engine oil viscosity is rated using the format XW-XX with the number preceding the W indicating viscosity at __________ ℉ and the XX indicating viscosity at __________ ℃.
100, 100 |
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0, 100 |
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0, 0 |
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100, 0 |
The primary component of the lubrication system is engine oil. Engines require oil blends with different thickness (viscosity) and additives depending on their operating conditions. Viscosity is rated using the format XW-XX with the number preceding the W (winter) rating the oil’s viscosity at 0 ℉ (-17.8 ℃) and the XX indicating viscosity at 100 ℃.
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 fuel results in a __________ air-fuel mixture that burns quicker and cooler.
rich |
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light |
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heavy |
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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.