Commercial Rules Free

Which is the fifth wheel position, before coupling to a trailer?

Wheel tilted down towards front of tractor

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Wheel tilted down towars rear of tractor

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Wheel level

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Tilt it up

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The air leakage for a combination vehicle (engine off, brakes off) should be less than?

1/2 psi per minute

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3 psi per minute

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4 psi per minute

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6 psi per minute

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If you cannot make a turn without entering to another lane, you should?

Make a wider turn when you complete the turn

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Don't do that turn and go to another place where you don't have to cross lanes

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Make a wider turn before you begin turning

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All of the above

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You have coupled with a semitrailer. In what position should you put the front trailer supports before driving away?”

Raised 3/4 way with the crank handle oved

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Raised half (1/2) way with the crank handle safety secured in its bracket

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Fully raised with the crank handle secured in its bracket

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Make a right turn

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How should you test the tractor-semitrailer connection for security

Put the tractor in gear and pull ahead with a sharp jerk

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Pull gently forward in low gear against the locked trailer brakes. Then look at it carefully

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Rock the trailer back and forth with the trailer brakes locked

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Fully swing the trailer

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There are two things that a driver can do to prevent a roll over They are (1) Keep the cargo as close to the ground as possible, and (2)?

Hold with both hands the steering wheel firmly

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Go slowly around turns

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Make sure that the brakes are properly adjusted

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Check emergency brakes

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A driver crosses the air lines when hooking up to an old trailer, What will happen?

The brake pedal will work the trailer spring brakes instead of the air brakes

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If the trailer has no spring brakes, he or she can drive away, but they will not have trailer brakes"

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The hand valve will apply the tractor brakes instead of the trailer brakes

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All of the above

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When should you use the hand valve to park a combination vehicle?

To park at loading docks

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Never

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To park on a grade

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Forever

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When you connect the glad hands, press the two seals together with the couplers to?

45 degree angle to each other

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180 degree angle to each other

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90 degree angle to each other

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360 degree angle to each other

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You are coupling a tractor and semitrailer and have connected the air lines. Before backing under the trailer, you should?

Move forward to test the glad hands connections

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Make sure that the trailer brakes are off

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Supply air to the trailer system, then pull out the air supply knob to lock the trailer brakes

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All of the above

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A driver crosses the air lines when hooking up to an old truck, What will happen?

The brake lights won't turn on, when you apply the pedal brake

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The hand valve will apply the tractor brakes instead of the trailer brakes

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If the trailer has no spring brakes, you can drive away, but you will not have trailer brakes"

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All of the above

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When pulling a tractor under a trailer, you should?

Always use the lowest gear reverse

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Do it faster to make sure the kingpin is locked on the fifth wheel

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Always back under the trailer at a delicate angle

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Never

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You supply air to the trailer tanks by?

Connecting the service line gland hand

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Pushing in the trailer air supply valve

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Pulling out the trailer air supply valve

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Pulling out the safety valve

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Offtracking’ or ‘cheating’. Which one will cause to follow the wider path when a vehicle goes around a corner

A bobtail

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5 axels tractor pulling a 45 feet trailer

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5 axels tractor pulling two 27 feet trailers

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5 axels tractor pulling a 65 feet trailer

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The maximum speed limit for a truck with a capacity of 2,000 pounds or less during day ligth or interestate road is

55 mph

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70 mph

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60 mph

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80 mph

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