Doubles Triples Test

24 Questions

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Driving Quizzes & Trivia

MIGUELS TEST/ DOUBLES TRIPLES


Questions and Answers
  • 1. 
    WHICH STATEMENT IS TRUE ABOUT DRIVING DOUBLES/TRIPLES?
    • A. 

      Rearward amplification prevents crack-the whip effect

    • B. 

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

    • C. 

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

    • D. 

      All of the above.

  • 2. 
    WHICH COMBINATION OF TRACTOR-TRAILERS SUFFERS MOST FROM THE CRACK-THE WHIP EFFECT?
    • A. 

      5 axle tractor-semi trailer.

    • B. 

      Turnpike double.

    • C. 

      California truck-full trailer

    • D. 

      Triple combination

  • 3. 
    WHAT'S THE CORRECT FOLLOWING DISTANCE WHEN PULLING A 100FT DOUBLE AT 30MPH?
    • A. 

      At least 8 seconds.

    • B. 

      At least 9 seconds.

    • C. 

      At least 10 seconds.

    • D. 

      At least 11 seconds.

  • 4. 
    WHAT'S THE CORRECT FOLLOWING DISTANCE WHEN PULLING A 100-FOOT TRIPLE COMBINATION AT 50MPH?
    • A. 

      At least 5 seconds.

    • B. 

      At least 7 seconds.

    • C. 

      At least 10 seconds.

    • D. 

      At least 11 seconds.

  • 5. 
    WHAT IS LIKELY TO HAPPEN WHEN THE TRAILER WHEELS OF A DOUBLE GOES INTO A SKID?
    • A. 

      The combination will slide sideways.

    • B. 

      The trailer will jackknife.

    • C. 

      The rig will continue moving straight ahead.

    • D. 

      The front wheels of the tractor will skid.

  • 6. 
    WHAT ARE CORRECT STATEMENTS ABOUT QUICK STEERING MOVEMENTS WITH DOUBLES AND TRIPLES?
    • A. 

      You should apply the brakes during quick steering.

    • B. 

      Doubles/triples tip over easily from quick steering.

    • C. 

      Counter steering is easier with doubles and triples.

    • D. 

      Stab braking is always used in quick steering.

  • 7. 
    WHAT ARE SOME GOOD TIPS ABOUT SEEING AHEAD WHEN DRIVING DOUBLES OR TRIPLES?
    • A. 

      Allow more following distance.

    • B. 

      Look far ahead so you can slow down gradually.

    • C. 

      Looking ahead increases your safety.

    • D. 

      All of the above answers are correct.

  • 8. 
    SAFE DRIVERS OF DOUBLES OR TRIPLES SHOULD:
    • A. 

      Use special care in bad weather and mountain driving.

    • B. 

      Look far ahead so you can slow down gradually.

    • C. 

      Looking ahead increases your safety.

    • D. 

      All of the above answers are correct.

  • 9. 
    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:
    • A. 

      Park the trailer against a wall or building.

    • B. 

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

    • C. 

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

    • D. 

      All of the above.

  • 10. 
    IF YOU WANT TO HOOK A COMBINATION TO A SECOND TRAILER HOW DO YOU KEEP THE TRAILER FROM MOVING?
    • A. 

      By using the trailer emergency brakes.

    • B. 

      By using the trailer spring brakes.

    • C. 

      By using wheel chocks.

    • D. 

      Any of the above will work.

  • 11. 
    WHERE SHOULD THE HEAVIEST TRAILER BE PLACED WHEN CONNECTING TWO OR MORE TRAILERS TO THE TRACTOR?
    • A. 

      In the front, next to the tractor.

    • B. 

      In the rear, as the last trailer.

    • C. 

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

    • D. 

      None of the above.

  • 12. 
    WHAT ARE SOME FEATURES OF CONVERTER DOLLIES?
    • A. 

      They have little braking power because they're small.

    • B. 

      They usually need glad hand converters.

    • C. 

      They do not have spring brakes.

    • D. 

      All of the above.

  • 13. 
    IN COUPLING, WHAT IS THE CORRECT HIGHT FOR A TRAILER THAT IS BEING CONNECTED TO A CONVERTER DOLLY?
    • A. 

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

    • B. 

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

    • C. 

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

    • D. 

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

  • 14. 
    HOW MUCH SPACE SHOULD THERE BE BETWEEN THE UPPER AND LOWER FIFTH WHEEL AFTER COUPLING OF A CONVERTER DOLLY TO THE REAR TRAILER?
    • A. 

      Drivers can't check the space visually.

    • B. 

      It depends on the load.

    • C. 

      Less than half inch.

    • D. 

      No space at all.

  • 15. 
    IN ORDER TO SUPPLY AIR TO THE AIR TANKS OF A SECOND TRAILER YOU SHOULD:
    • A. 

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

    • B. 

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

    • C. 

      Close the shut off valve of both trailers.

    • D. 

      Open the shut off valve of both trailers.

  • 16. 
    WHEN COUPLING DOUBLES, HOW CAN YOU BE SURE AIR IS SUPPLIED TO THE LAST TRAILER?
    • A. 

      Open the hand valve and listen for air.

    • B. 

      Look at the air gauge for each trailer.

    • C. 

      Push in the tractor protection valve.

    • D. 

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

  • 17. 
    WHAT COULD HAPPEN IN YOU UNLOCK THE PINTLE HOOK WITH THE DOLLY STILL UNDER THE REAR TRAILER?
    • A. 

      Nothing will happen unless it rolls back.

    • B. 

      The dolly tow bar may fly up.

    • C. 

      The trailer emergency brakes will lock.

    • D. 

      The pintle hook may bend.

  • 18. 
    ON A WALK AROUND INSPECTION OF A DOUBLE, THE POSITION OF THE DOLLY AIR TANK DRAIN VALVE AND PINTLE HOOK SHOULD BE:
    • A. 

      Open, free.

    • B. 

      Closed, free.

    • C. 

      Open, latched.

    • D. 

      Closed, latched.

  • 19. 
    SHOULD THE PINTLE HOOK OF THE DOLLY BE LATCHED AFTER COUPLING?
    • A. 

      Only if you are backing up.

    • B. 

      Only when coupling a loaded trailer.

    • C. 

      Yes.

    • D. 

      No.

  • 20. 
    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. 

      A low intermittent whistle.

    • B. 

      The tractor protection valve pop out.

    • C. 

      Air escapes from the open valve.

    • D. 

      Nothing at all, if things are OK.

  • 21. 
    TO TEST THE TRAILER EMERGENCY BRAKES, YOU SHOULD CHARGE THE AIR BRAKE SYSTEM, CHECK THAT TRAILER ROLLS FREELY AND:
    • A. 

      Push in the trailer air supply control

    • B. 

      Pull out the trailer air supply control

    • C. 

      Push in the tractor protection valve.

    • D. 

      None of the above.

  • 22. 
    HOW DO YOU TEST THE TRAILER BRAKES OF A DOUBLE AFTER YOU HAVE TURNEDTHE HAND BRAKE ON?
    • A. 

      Bring the air pressure up to normal.

    • B. 

      Turn the parking brakes off.

    • C. 

      Move slowly forward to see if the vehicle slows down.

    • D. 

      All of the above.

  • 23. 
    HOW MUCH MORE STOPPING DISTANCE DO YOU NEED WHEN STOPPING A COMBINATION AT 40 MPH THAN AT 20MPH?
    • A. 

      2 times.

    • B. 

      4 times.

    • C. 

      6 times.

    • D. 

      10 times.

  • 24. 
    FOR EMERGENCY BRAKING WITH DOUBLES OR TRIPLES, YOU SHOULD BRAKE IN WHAT MANNER?
    • A. 

      Use only the trailer brakes.

    • B. 

      Use light, steady pressure on the brake.

    • C. 

      Use controlled or stab braking.

    • D. 

      Use lock braking and steering.