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30 Cards in this Set
- Front
- Back
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When coupling a tractor trailer and you are backed up to but not under the semi, you should |
Connect the air lines before proceeding |
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What should you do when backing into a trailer? |
Line up directly under the trailer |
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Which of the following things should you do when operating a combination vehicle? |
Steer gently, brake early and prevent trailer skids |
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What can you do to prevent rollover type accidents? |
Keep your load centered (keep load low and drive slow) |
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You should use the trailer hand valve (trolly valve, Johnson bar) when |
To test air brakes |
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If the air pressure is low, the tractor protection valve will close and the following will happen |
The trailer emergency brakes will be applied automatically |
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If you are pulling an older trailer and cross the airline hookups, what will happen? |
The brakes on the trailer will not work, only the tractor will work |
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What is the proper procedure to park trailers that do not have Spring brakes? |
Chock the wheels |
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After coupling, when the full weight of the trailer is resting on the tractor, you should check for enough clearance between the rear of the tractor frame and the landing gear and |
Clearance between the top of the tractor tires and the nose of the trailer. |
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When raising the landing gear after coupling, how far up should the gear be raised? |
Until the upper limit of the gear is reached |
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When uncoupling a semi trailer from a tractor, it's easier to release the 5th wheel jaws if |
The tractor is backed up after setting the trailer parking brakes |
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What additional items should you inspect when inspecting a combination vehicle? |
The 5th wheel and trailer landing gear |
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How much space is required between the upper and lower plates on the 5th wheel when coupled to a semi trailer |
No space |
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Why is it recommended to attach the glad hands together or to dummy couplings when not coupled to a trailer? |
To keep dirt and water out of the air system |
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What color is the emergency air line in a combination vehicle? |
Red |
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What is the best way to recognize that the trailer skid is happening? |
You will see it in your mirrors |
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What is the best way to recover from a Jack knife? |
Stop applying the brakes |
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When making a right turn |
Swing wide after starting the turn and keep the rear wheels of the trailer as close to the curb without running the curb |
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When a vehicle goes around a corner, the rear wheels follow a different path than the front wheels. This is called |
Off tracking |
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Which of the following is not a true statement regarding the air supply control? |
It is sometimes called the trolley valve or Johnson bar |
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A vehicles defect during an inspection can help you avoid |
Costly break down on the road Crash An "out of service" violation |
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More than half of truck drivers deaths in crashes are the result of |
Rollovers |
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Drivers of combination vehicles need additional skills because |
Combination vehicles are longer And heavier |
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When the wheels of a trailer lock up and the trailer swings around, this is called |
Jacknife |
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Relay valves |
Allow the trailer breaks to be applied more quickly |
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Off tracking is |
The trailer wheels follow a different path than the tractor wheels |
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To avoid the crack the whip effect when you pull a trailer |
Steer gently and smoothly |
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When you are coupling a semi trailer to the tractor but have not yet backed under. The trailer is at the right height when |
It will rise slightly when the tractor is backed under it |
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The trailer hand valve (also called the trolley valve or Johnson bar) works the trailer brakes. Do not use it while driving because of the danger of making the trailer skid. The trailer hand valve should only be used |
Testing the trailer brakes after hooking up to a trailer |
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How do you know if your trailer is equipped with anti lock brakes? |
ABS lamps on the left side |
