CDL Doubles & Triples Test 5 – Classic Mode

1. When should you check your mirrors while making a lane change?

A After signaling the change
B Right after starting the lane change
C After completing the lane change
D All of the above

2. Which of these statements about managing space to the sides is true?

A Always keep your vehicle to the right side of your lane
B You should avoid traveling next to others when possible
C High winds are not a problem for doubles and triples
D All of the above

3. Which of these statements about handling of doubles and triples is true?

A The rear trailer of a 100 foot triple is less likely to turn over than a single semi trailer due to the crack the whip effect
B A triple bottom rig can stop quicker that a 5 axle tractor semi trailer due to off tracking
C A sudden movement with the steering wheel can result in a tipped over rear trailer
D None of the above

4. How can you be sure you supplied air to a second trailer?

A Go to the rear of the second trailer and open the emergency line shut off
B Watch each trailer's air gauge for a drop of 30 psi
C Apply the hand valve at 10 mph. You should stop in the same distance as a truck with one trailer at 5 mph.
D Get out and listen for air flowing through the lines

5. You should check the height of the trailer before connecting a converter dolly to a second or third trailer. The trailer height is right when:

A The trailer will be raised slightly when the converter dolly is backed under it.
B The kingpin rests on the fifth wheel
C The center of the kingpin lines up with the locking jaws
D All of the above

6. You want to hook your combination to a second trailer that has no spring brakes. To do this without wheel chocks you should:

A Make sure the trailer will roll freely when coupling
B Hook the trailer electric cord to a portable generator for braking power.
C Supply air to the trailer air system with the tractor and then disconnect the emergency line
D Couple the trailer to the tractor, everything is ok

7. Which of these in not a good thing to do when driving on slippery roads?

A Use the engine brake or speed retarder
B Use a light touch on the accelerator and brake pedals
C Keep other traffic out of you side space
D None of the above

8. Which of these will result in the best control on curves?

A There is really no need to slow down for a curve
B Downshift after you enter the curve
C Braking during the turn
D Slowing to a safe speed before entering the curve, then accelerate slightly during the curve

9. You are driving a set of doubles. A set of trailer wheels goes into a skid. Which of these is most likely to occur?

A The rig will continue to move in a straight line no matter how much the steering wheel is turned.
B You will have a trailer jackknife
C The rig will stay in a straight line but slide sideways
D None of the above

10. Before you can supply air to the air tanks of a second trailer you need to:

A Open the shut off valves at the rear of the first trailer, and close the shut off valves at the rear of the second trailer
B Close the shut off valves at the rear of both trailers
C Open the shut off valves at the rear of both trailers
D None of the above

End of Test #5

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