| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.86 |
| Score | 0% | 57% |
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.
A __________ is a drive axle that extends from a transaxle or differential to one of the drive wheels.
control arm |
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drive shaft |
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half shaft |
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steering linkage |
A half shaft is a drive axle that extends from a transaxle or differential to one of the drive wheels. There are two half shafts per drive axle, one for each wheel, each doing "half" the job.
Which of the following is the result of the air-fuel mixture exploding instead of burning?
detonation |
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pre-detonation |
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pre-ignition |
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post-ignition |
Normal combustion in an engine is initiated by a spark plug and results in the complete burning of the air-fuel mixture. If combustion is initiated by a source other than the spark plug, by a hot spot in the cylinder or combustion chamber for example, pre-ignition results. Detonation results if the air-fuel mixture explodes instead of burning. Detonation can cause extremes in pressure in the combustion chamber leading to engine damage.
Both intake and exhaust valves are closed as the piston begins moving back up from the bottom of the cylinder, compressing the air-fuel mixture in the combustion chamber which also makes it hotter. This describes which engine stroke?
power |
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exhaust |
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compression |
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intake |
During the compression stroke, both intake and exhaust valves are closed as the piston begins moving back up from the bottom of the cylinder (bottom dead center or BDC). This compresses the air-fuel mixture in the combustion chamber which also makes it hotter.
Piston rings are responsible for which of the following?
containing combustion |
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connecting the piston to the spark plug |
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connecting the piston to the camshaft |
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regulating oil distribution inside the cylinder |
Cylinders act as a guide for the pistons that translate the heat energy of combustion into the mechanical energy necessary to move a vehicle. Piston rings seal the piston to the cylinder to contain combustion gases and also regulate the oil distribution between the piston and cylinder wall. A cylinder head closes in the top of the cylinder forming the combustion chamber which is sealed by a head gasket (head). The head provides space for air and fuel intake valves, exhaust valves, and mounts for spark plugs and fuel injectors.