| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.94 |
| Score | 0% | 59% |
Which of the following is not an advantage that disc brakes have over drum brakes?
use less brake fluid |
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provide a larger contact area |
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are more easily cooled |
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provide more braking force |
Brakes utlize friction to slow vehicle tires. Drum brakes employ a cast iron drum that roates with the vehicle axle. When hydraulic pressure is applied to the brake assemblies at the wheels, internal pistons expand and push brake shoes outward into contact with the brake drum slowing the rotation of the axle. More powerful disc brakes operate by pinching a rotating disc betweeen two brake pads and allow for a larger surface area to contact the disc, provide more force, and are more easily cooled.
Exhaust gases from cylinder exhaust valves are collected by the:
exhaust manifolds |
|
tail pipe |
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catalytic converter |
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muffler |
The cast iron exhaust manifolds collect engine exhaust gas from multiple cylinder exhaust valves and deliver it to the exhaust pipe. Exhaust manifolds can be generic or specially tuned (header pipes) to the engine. Header pipes deliver higher performance but are more expensive and less durable.
What type of energy does an automotive battery produce?
direct current |
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alternating current |
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chemical energy |
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rotational energy |
An automotive battery produces direct current for use by automotive systems.
The __________ converts pressure on the brake pedal to hydraulic pressure in the brake lines.
brake cylinder |
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brake knuckle |
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master cylinder |
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brake linkage |
The master (brake) cylinder converts pressure on the brake pedal to hydraulic pressure in the brake lines.
Engines with radial cylinder configurations are most common in:
tank engines |
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aircraft engines |
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heavy truck engines |
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train engines |
A radial arrangement places cylinders in a circle around the crankshaft and is used almost exclusively in aircraft engines.