Doubles And Triples

Front 1

Which of these statements about quick steering movements and doubles/triples is true?

Back 1

Doubles/triples flip over from quick steering movements more easily than do many other vehicles.

Front 2

With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. When you do this, you should hear

Back 2

Air escape from the open valve.

Front 3

You are visually checking the coupling of a converter dolly to the rear trailer. How much space should there be between the upper and lower fifth wheel?

Back 3

There should be none.

Front 4

Some trucks have a convex or "spot" mirrors. Such mirrors

Back 4

Make things look smaller and farther away than they really are.

Front 5

If you want to couple a second trailer to your combination vehivle, secure it by using

Back 5

Wheel chocks.

The trailer's spring breaks and emergency air brakes.

Front 6

What is likely to happen if pintle hook is unlocked while the dolly is still under the second trailer?

Back 6

The dolly tow bar may fly up.

Front 7

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

Back 7

You should avoid traveling next to others whenever possible.

Front 8

Driving a truck with double or triple trailers requires a driver to

Back 8

Allow more following distance than with smaller vehicles.

Take special care in bad weather and mountain conditions.

Front 9

The crack-the-whip effect that troubles trucks with trailers is most likely to tip over

Back 9

The rear trailer of a triple.

Front 10

You are doing a walk-around inspection of a double or triple trailer rig. You should be sure that the converter dolly air tank drain valves are _____ and the pintle hook is _____.

Back 10

Closed; latched

Front 11

You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking, you should

Back 11

Use controlled or stab braking.

Front 12

You are driving a 100-foot twin trailer combination at 50 mph. The road is dry and the visibility is good. You should keep at least _____ seconds of space ahead of you.

Back 12

11

Front 13

Which of these is not a good thing to do when driving on slippery roads?

Back 13

Use the engine brake or engine retarder.

Front 14

The best way to stop all skids is to

Back 14

Restore traction to the tires.

Front 15

Empty trucks

Back 15

May have poor traction due to bouncing and wheel lockup.

Front 16

You should check the height of the trailer before connecting a converter dolly to a seco d or third trailer. The trailer height is right if

Back 16

The trailer will be raised slightly when the converter dolly is backed under it.

Front 17

Converter dolly

Back 17

Often do not have spring brakes.

Front 18

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

Back 18

Sudden movement with the steering wheel can result in a tipped-over rear trailer.

Front 19

You are driving a 100-foot truck with double trailers at 30 mph. The road is dry. Visibility is good. You should keep at least _____ secoonds of space ahead of you.

Back 19

10

Front 20

You want to hook your combination to a second trailer that had no spring brakes. 5o do this without wheel chocks, you should

Back 20

Supply air to the trailer air system with the tractor and then disconnect the emergency line.

Front 21

Back 21

B