Doub/Trips Test 3

1. When should you check your mirrors while making a lane change?
After signaling the change
Right after starting the lane change
After completing the lane change
All of the above

2. Which of these statements about managing space to the sides is true?
Always keep your vehicle to the right side of your lane
You should avoid traveling next to others when possible
High winds are not a problem for doubles and triples
All of the above

3. Which of these statements about handling of doubles and triples is true?
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
A triple bottom rig can stop quicker that a 5 axle tractor semi trailer due to off tracking
A sudden movement with the steering wheel can result in a tipped over rear trailer
None of the above

4. How can you be sure you supplied air to a second trailer?
Go to the rear of the second trailer and open the emergency line shut off
Watch each trailer's air gauge for a drop of 30 psi
Apply the hand valve at 10 mph. You should stop in the same distance as a truck with one trailer at 5 mph.
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:
The trailer will be raised slightly when the converter dolly is backed under it.
The kingpin rests on the fifth wheel
The center of the kingpin lines up with the locking jaws
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:
Make sure the trailer will roll freely when coupling
Hook the trailer electric cord to a portable generator for braking power.
Supply air to the trailer air system with the tractor and then disconnect the emergency line
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?
Use the engine brake or speed retarder
Use a light touch on the accelerator and brake pedals
Keep other traffic out of you side space
None of the above

8. Which of these will result in the best control on curves?
There is really no need to slow down for a curve
Downshift after you enter the curve
Braking during the turn
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?
The rig will continue to move in a straight line no matter how much the steering wheel is turned.
You will have a trailer jackknife
The rig will stay in a straight line but slide sideways
None of the above

10. Before you can supply air to the air tanks of a second trailer you need to:
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
Close the shut off valves at the rear of both trailers
Open the shut off valves at the rear of both trailers
None of the above