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UPGRADE TO CDL PREMIUM
1.
If stopped on a hill, how can you start moving without rolling back?
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Press on the gas pedal, even if you have to roll back a little.
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Partly engage the clutch before you take your right foot off the brake, put on the parking brake if necessary.
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Release the parking brake before you have applied enough engine power to keep from rolling back.
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None of the above.
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2.
When you make a quick lane change, the crack-the-whip effect can:
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turn the trailer over.
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make it harder to turn without skidding.
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improve your traction.
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the trailer to swing wide to the left.
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3.
Supply pressure gauges tell drivers:
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how much pressure the relay valves should send to the trailer brakes.
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how much pressure is in the air tanks.
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how much air pressure they are applying to the brakes.
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All of the above.
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4.
An ABS system:
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gives you more control over the vehicle during braking.
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helps you avoid skids caused by over braking.
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keep your wheels from locking when you brake hard.
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All of the above.
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5.
Air tanks must be drained because:
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if one air system is low on pressure, the rear brakes will not be operating fully.
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if you don't drain the tanks yourself, your battery fluid may drain out.
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when you push the brake pedal, air is let into each brake chamber.
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compressed air usually has some water in it. The water can freeze in cold
weather and cause brake failure.
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6.
If your vehicle catches fire, you should pull over:
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in an open area.
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near other vehicles.
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near trees.
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at a service station.
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7.
ABS:
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makes it easier to break.
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allows the wheels to lock up.
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helps you avoid wheel lock up.
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makes it easier to turn.
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8.
Which of the following is NOT correct? An ABS system:
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helps you avoid wheel lock up.
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helps you stop faster.
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reduces the braking pressure to a safe level.
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is a safety anti-skid braking system.
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9.
How can you tell if your vehicle is equipped with ABS (anti-lock braking system)?
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ABS is required on all vehicles manufactured on or after 2000.
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ABS is required on all vehicles manufactured on or after 2005.
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There is no way to tell, ABS is still optional on all vehicle types.
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Trucks, buses, trailers, and converter dollies built after 1998 are required to have ABS.
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10.
While driving, you should use your mirrors to:
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know where other vehicles are around you.
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check where the rear of your vehicle is while you make turns.
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check the condition of the tires and cargo.
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All of the above.
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