| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.58 |
| Score | 0% | 72% |
In a four-stroke piston cycle, one piston is always:
delivering power |
|
compressing the air-fuel mixture |
|
all of these are correct |
|
exhausting gases |
In a four-stroke cycle engine there is always one piston delivering power, one exhausting gases, one drawing in the air-fuel mixture, and one compressing that mixture.
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 a rigid axle front suspension |
|
your car has an independent front suspension |
|
your car has a rigid axle rear suspension |
|
your car has an independent 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.
What provides the power necessary to start a car?
alternator |
|
powertrain control module |
|
spark plugs |
|
battery |
The battery supplies the power necessary to start the engine when the ignition switch is is turned on.
Control arms connect a vehicle's suspension to the frame. The connection to the frame uses:
ball joints |
|
bushings |
|
knuckles |
|
pins |
Control arms (upper and lower) connect a vehicle's suspension to the frame. The connection to the wheels is through ball joints which allow the control arms to turn and move up and down simultaneously. The frame connection uses bushings.
Which of the following regulates the opening and closing of the intake and exhaust valves in each cylinder in time with the motion of the piston?
connecting arm |
|
camshaft |
|
halfshaft |
|
crankshaft |
The camshaft is linked to the crankshaft through a timing belt and regulates the opening and closing of the intake and exhaust valves in each cylinder in time with the motion of the piston. An engine designated OverHead Camshaft (OHC) locates the camshaft in the cylinder head. An engine with Double OverHead Camshaft (DOHC) has two camshafts, one to regulate the intake valves and one to regulate the exhaust valves.