CDL - SECTION 7 - DOUBLES TRIPLES EXAM QUESTIONS

PDF Download CDL - SECTION 7 - DOUBLES & TRIPLES EXAM QUESTIONS Actual Qs and Ans Expert-Verified Explanation

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-Guarantee passing score -8 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: How do you check to make sure trailer height is correct before coupling?

Answer:

It must be slightly lower than the center of the fifth wheel so trailer is raised slightly when dolly is pushed under

Question 2: How can you test that air flows to all trailers?

Answer:

Charge the air system completely and check that the trailer rolls freely. Then stop and pull the trailer air supply control and place it in the emergency position.. pull gently to see that the emergency brakes are on

Question 3: How do you check when making a visual check of coupling?

Answer:

Make sure there is no space between upper and lower 5th wheel and that the locking jaws are locked on the kingpin

Question 4: Do Converter Dollies have spring brakes?

Answer:

Yes, Converter Dollies have spring brakes

Question 5: Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front?

Answer:

The reason is that the dolly tow bar may fly up and possibly cause injury and making it quite difficult to recouple Question 6: What should you check for when inspecting the converter dolly? The pintle hook?

Answer:

? Position combination as close as possible to converter dolly.? Move dolly to rear of first semitrailer and couple it to the trailer.? Lock pintle hook.? Secure dolly support in raised position.? Pull dolly into position as close as possible to nose of the second semitrailer.? Lower dolly support.? Unhook dolly from first trailer.? Wheel dolly into position in front of second trailer in line with the kingpin.Question 7: What three methods can you use to secure a second trailer before coupling?

Answer:

Drive tractor close to the trailer and connect the emergency line charge the trailer air tank and disconnect the emergency line. This will set the emergency brakes Question 8: Should the shut-off valves on the rear of the last trailer be open or closed? On the first trailer in a set of doubles? On the middle trailer of a set of triples?

Answer:

? Shut-off valves (at rear of trailers, in service and emergency lines).

? Rear of front trailers: OPEN.

? Rear of last trailer: CLOSED.

? Converter dolly air tank drain valve: CLOSED.