Doubles/Triples 1 Quiz – Brewsterstransport

Created on October 30, 2023

Doubles/Triples 1

1 / 20

A converter dolly with antilock brakes (ABS) is required to have

A) a white lamp on the right side.

B) a yellow lamp on the left side.

C) a white lamp on the left side.

2 / 20

To uncouple the rear trailer, the first thing you do is

A) park the vehicle at a 45-degree angle on an incline

B) park the vehicle at a 45-degree angle on level ground.

C) park the vehicle in a straight line on firm level ground.

3 / 20

If your test of the tractor protection valve is successful,

A) the low air pressure warning signal will come on.

B) the parking brake valve will pop out.

C) the tractor protection valve control (trailer air supply control) will pop out or go from "normal" to "emergency."

4 / 20

In order, the four steps to test your trailer's service brakes are as follows

A) Apply the trailer brakes, using the hand control if so equipped. Release the trailer's parking brakes. Check for normal air pressure. Pull forward slowly.

B) Check for normal air pressure. Release the parking brakes. Apply the trailer brakes, using the hand control if so equipped. Step off the brakes and pull forward slowly.

C) Check for normal air pressure. Release the parking brakes. Pull forward slowly. Apply the trailer brakes, using the hand control if so equipped.

5 / 20

The tractor protection valve is designed to close automatically when the air pressure falls into the pressure range specified by the manufacturer, typically

A) 75 to 100 psi.

B) 50 to 75 psi.

C) 20 to 45 psi.

6 / 20

Coupling a triple trailer is different from coupling other combinations because

A) you couple the second trailer to the first trailer and then couple them both to the tractor.

B) you couple the third trailer to the second trailer before you couple them to the first trailer.

C) you do not have to use a converter dolly.

7 / 20

If your landing gear is power operated, you should check for ________ during your walk-around inspection.

A) dirt or grime

B) leaks of water or gasoline

C) leaks of air or hydraulic fluid

8 / 20

To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and

A) step on and off the brake pedal several times.

B) flash your high-beam headlights on and off several times.

C) keep pressing the brake pedal firmly.

9 / 20

You have connected the converter dolly to the front semitrailer and then connected the rear semitrailer to the converter dolly. How should you test the coupling?

A) Pull against the rear semitrailer's pin.

B) Drive forward slowly and see if the rear semitrailer stays attached.

C) Drive forward, brake suddenly, and see if the rear semitrailer hits the one in front of it.

10 / 20

If a converter dolly has spring brakes, you release the brakes by

A) opening the air tank petcock.

B) doing both of the above.

C) using the dolly's parking brake control.

11 / 20

A converter dolly is

A) a coupling device that connects a semitrailer to the rear of a tractor-trailer.

B) an electronic device that connects the electric power from a semitrailer to the rear of a tractor-trailer.

C) a coupling device that converts the electricity between a semitrailer and a tractor-trailer for international trucking.

12 / 20

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

Open, freeClosed, latchedOpen, latched

A) Open, latched

B) Closed, latched

C) Open, free

13 / 20

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

A) Push the brake pedal as hard as you can and hold it there

B) Use only the trailer brakes

C) Use controlled or stab braking

14 / 20

You are driving a 100' vehicle with double trailers at 30 MPH. The road is dry, and visibility is good. You should keep at least _____ seconds of space ahead of you:

A) 10

B) 11

C) 9

15 / 20

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

A) Braking during the turn

B) Downshift after you enter the curve

C) Slowing to a safe speed before entering the curve, then accelerate slightly during the curve

16 / 20

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

A) Use special care in bad weather and mountain conditions

B) Do both things

C) Allow more following distance than for smaller vehicles

17 / 20

When driving with more than one trailer, which trailer should be the first one behind the tractor?

A) The shortest trailer

B) The lightest trailer

C) The heaviest trailer

18 / 20

When does the drivers manual advise disconnecting the steering axle brakes to help keep the rig straight?

A) Any time you must

B) Never

C) When the road is dry

19 / 20

The best way to stop all skids is to:

A) Restore traction to the tires

B) Counter steer and accelerate

C) Use stab or controlled braking

20 / 20

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 center of the kingpin lines up with the locking jaws

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

C) The kingpin rests on the fifth wheel

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