| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.15 |
| Score | 0% | 63% |
Which of the following is not a primary function of a vehicle's lubrication system?
increases fuel economy |
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cools engine parts |
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clean contaminants |
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quiets engine noise |
The lubrication system lubricates engine components by putting an oil film between them to reduce friction and smooth engine operation, cools by absorbing heat from engine parts, seals the pistons and cylinders to contain combustion, cleans contaminants, and quiets engine noise.
The vehicle's computer system gets data from:
sensors |
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actuators |
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regulators |
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inhibitors |
Sensors provide the data necessary for the vehicle's computer to make decisions and monitor everything from simple vehicle information like tire pressure to complexities like the chemical content of an engine's exhaust.
Another name for the powertrain control module is the __________ control unit.
electrical |
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transmission |
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universal |
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engine |
The main computer or powertrain control module (PCM) uses pre-programmed software to analyze the input received from sensors and produce output signals to adjust vehicle performance and operation. (Engine control unit (ECU) is another name for the PCM.)
The right front wheel of your front-wheel drive car drops into a pothole and the left front wheel doesn't lose contact with the road. Which of the following is true?
your car has an independent front suspension |
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your car has a rigid axle front suspension |
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your car has an independent rear suspension |
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your car has a rigid axle rear suspension |
An independent suspension allows the wheels on either side of an axle to move independently from each other. The fact that the left front wheel didn't move up in response to the right front wheel moving down is evidence of this.
Another name for a reciprocating engine is a(n):
cylinder engine |
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external combustion engine |
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internal combustion engine |
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piston engine |
A reciprocating engine is an engine whose crankshaft is turned by pistons moving up and down in a cylinder.