DOUBLES TRIPLES TEST

1. SAFE DRIVERS OF DOUBLES OR TRIPLES SHOULD:

Use special care in bad weather and mountain driving.

Look far ahead so you can slow down gradually.

Looking ahead increases your safety.

All of the above answers are correct.

2. WHAT ARE SOME GOOD TIPS ABOUT SEEING AHEAD WHEN DRIVING DOUBLES OR TRIPLES?

Allow more following distance.

Look far ahead so you can slow down gradually.

Looking ahead increases your safety.

All of the above answers are correct.

3. WHERE SHOULD THE HEAVIEST TRAILER BE PLACED WHEN CONNECTING TWO OR MORE TRAILERS TO THE TRACTOR?

In the front, next to the tractor.

In the rear, as the last trailer.

Don't connect trailers that are not the same weight.

None of the above.

4. WHICH COMBINATION OF TRACTOR-TRAILERS SUFFERS MOST FROM THE CRACK-THE WHIP EFFECT?

5 axle tractor-semi trailer.

Turnpike double.

California truck-full trailer

Triple combination

5. HOW MUCH SPACE SHOULD THERE BE BETWEEN THE UPPER AND LOWER FIFTH WHEEL AFTER COUPLING OF A CONVERTER DOLLY TO THE REAR TRAILER?

Drivers can't check the space visually.

It depends on the load.

Less than half inch.

No space at all.

6. WHAT IS LIKELY TO HAPPEN WHEN THE TRAILER WHEELS OF A DOUBLE GOES INTO A SKID?

The combination will slide sideways.

The trailer will jackknife.

The rig will continue moving straight ahead.

The front wheels of the tractor will skid.

7. WHAT COULD HAPPEN IN YOU UNLOCK THE PINTLE HOOK WITH THE DOLLY STILL UNDER THE REAR TRAILER?

Nothing will happen unless it rolls back.

The dolly tow bar may fly up.

The trailer emergency brakes will lock.

The pintle hook may bend.

8. SHOULD THE PINTLE HOOK OF THE DOLLY BE LATCHED AFTER COUPLING?

Only if you are backing up.

Only when coupling a loaded trailer.

Yes.

No.

9. WHAT'S THE CORRECT FOLLOWING DISTANCE WHEN PULLING A 100-FOOT TRIPLE COMBINATION AT 50MPH?

At least 5 seconds.

At least 7 seconds.

At least 10 seconds.

At least 11 seconds.

10. WHAT ARE CORRECT STATEMENTS ABOUT QUICK STEERING MOVEMENTS WITH DOUBLES AND TRIPLES?

You should apply the brakes during quick steering.

Doubles/triples tip over easily from quick steering.

Counter steering is easier with doubles and triples.

Stab braking is always used in quick steering.

11. IF YOU WANT TO HOOK A COMBINATION TO A SECOND TRAILER HOW DO YOU KEEP THE TRAILER FROM MOVING?

By using the trailer emergency brakes.

By using the trailer spring brakes.

By using wheel chocks.

Any of the above will work.

12. WHAT'S THE CORRECT FOLLOWING DISTANCE WHEN PULLING A 100FT DOUBLE AT 30MPH?

At least 8 seconds.

At least 9 seconds.

At least 10 seconds.

At least 11 seconds.

13. ON A WALK AROUND INSPECTION OF A DOUBLE, THE POSITION OF THE DOLLY AIR TANK DRAIN VALVE AND PINTLE HOOK SHOULD BE:

Open, free.

Closed, free.

Open, latched.

Closed, latched.

14. TO TEST THE TRAILER BRAKES OF A DOUBLE, TURN THE HAND VALVE ON, AND OPEN THE SERVICE LINE VALVE AT THE REAR OF TH RIG. YOU SHOULD HEAR:

A low intermittent whistle.

The tractor protection valve pop out.

Air escapes from the open valve.

Nothing at all, if things are OK.

15. FOR EMERGENCY BRAKING WITH DOUBLES OR TRIPLES, YOU SHOULD BRAKE IN WHAT MANNER?

Use only the trailer brakes.

Use light, steady pressure on the brake.

Use controlled or stab braking.

Use lock braking and steering.

16. IN ORDER TO SUPPLY AIR TO THE AIR TANKS OF A SECOND TRAILER YOU SHOULD:

Open the shut off valve of the second trailer and close the valve of the first trailer.

Close the shut off valve of both trailers.

Open the shut off valve of both trailers.

17. IN COUPLING, WHAT IS THE CORRECT HIGHT FOR A TRAILER THAT IS BEING CONNECTED TO A CONVERTER DOLLY?

It must be slightly lower than the center of the fifth wheel.

The trailer must be higher than the top of the dolly.

The fifth wheel should be the same height as the kingpin.

The locking jaws and the kingpin flange should be the same height.

18. WHICH STATEMENT IS TRUE ABOUT DRIVING DOUBLES/TRIPLES?

Rearward amplification prevents crack-the whip effect

The rear trailer of a triple is less likely to tip over than a double.

A sudden steering movement can result in the rear trailer tipping over.

All of the above.

19. HOW MUCH MORE STOPPING DISTANCE DO YOU NEED WHEN STOPPING A COMBINATION AT 40 MPH THAN AT 20MPH?

2 times.

4 times.

6 times.

10 times.

20. WHEN COUPLING DOUBLES, HOW CAN YOU BE SURE AIR IS SUPPLIED TO THE LAST TRAILER?

Open the hand valve and listen for air.

Look at the air gauge for each trailer.

Push in the tractor protection valve.

Open the emergency line shut-off valve at rear of last trailer.

21. HOW DO YOU TEST THE TRAILER BRAKES OF A DOUBLE AFTER YOU HAVE TURNEDTHE HAND BRAKE ON?

Bring the air pressure up to normal.

Turn the parking brakes off.

Move slowly forward to see if the vehicle slows down.

All of the above.

22. WHAT ARE SOME FEATURES OF CONVERTER DOLLIES?

They have little braking power because they're small.

They usually need glad hand converters.

They do not have spring brakes.

All of the above.

23. TO TEST THE TRAILER EMERGENCY BRAKES, YOU SHOULD CHARGE THE AIR BRAKE SYSTEM, CHECK THAT TRAILER ROLLS FREELY AND:

Push in the trailer air supply control

Pull out the trailer air supply control

Push in the tractor protection valve.

None of the above.

24. IF YOU WANT TO HOOK A COMBINATION TO A SECOND TRAILER THAT HAS NO SPRING BRAKES AND YOU DON'T' HAVE WHEEL CHOCKS YOU SHOULD:

Park the trailer against a wall or building.

Supply air to the trailer air system (from the tractor), and disconnect the emergency line.

Hook the trailer electric cord to a generator to supply braking power.

All of the above.

Submit

Doubles Triples Test