Combination Vehicle Test
COMBINATION VEHICLE TEST
- 1.
TO PREVENT A ROLLOVER, KEEP THE CARGO AS CLOSE TO THE GROUND AS POSSIBLE, AND:
- A.
KEEP BOTH HANDS ON THE STEERING WHEEL
- B.
KEEP YOUR BRAKES ADJUSTED
- C.
GO SLOW AROUND CURVES
- D.
KEEP YOUR TIRES INFLATED PROPERLY
Correct Answer
C. GO SLOW AROUND CURVES -
- 2.
WHY ARE "BOBTAIL" TRACTORS HARDER TO STOP THAN SOME LOADED COMBINATION VEHICLES?
- A.
THE TAIL OF THE VEHICLE IS SHORTER
- B.
THE VEHICLE IS RELATIVELY LIGHT
- C.
THERE ARE FEWER WHEELS TO STOP THE TRACTOR
- D.
THERE ARE MORE BRAKE SYSTEMS ON A COMBINATION VEHICLE
Correct Answer
B. THE VEHICLE IS RELATIVELY LIGHT -
- 3.
TO STOP A JACKKNIFE OF A COMBINATION VEHICLE:
- A.
USE THE TRAILER HAND BRAKE BEFORE THE BRAKE PEDAL
- B.
DO NOT USE THE TRAILER HAND BRAKE
- C.
TURN THE STEERING WHEEL IN THE OPPOSITE DIRECTION OF THE SKID
- D.
NONE OF THE ABOVE
Correct Answer
B. DO NOT USE THE TRAILER HAND BRAKE -
- 4.
WHAT IS OFFTRACKING?
- A.
WHEN THE REAR WHEELS FOLLOW A DIFFERENT PATH THAN THE FRONT WHEELS
- B.
THE PROCESS OF TAKING THE TRACKS OFF A TRACTOR
- C.
DRIVER FAILING TO KEEP ON ROUTE ON TRACK
- D.
ERROR ON KEEPING TRACK OF HOURS AND MILES DRIVEN
Correct Answer
A. WHEN THE REAR WHEELS FOLLOW A DIFFERENT PATH THAN THE FRONT WHEELS -
- 5.
WHEN SHOULD YOU USE THE TRAILER HAND VALVE?
- A.
AS A PARKING BRAKE
- B.
ONLY WHEN THE TRAILER IS FULLY LOADED
- C.
TO TEST THE TRAILER BRAKES
- D.
IN COMBINATION WITH THE FOOT BRAKE
Correct Answer
C. TO TEST THE TRAILER BRAKES -
- 6.
WHAT IS THE PURPOSE OF THE TRACTOR PROTECTION VALVE?
- A.
IT KEEPS AIR IN THE TRACTOR IF THE TRAILER BREAKS AWAY OR DEVELOPS A BAD LEAK
- B.
IT PROTECTS THE TRACTOR FROM BRAKE DAMAGE
- C.
IT IS A BACK-UP FOR THE TRAILER AIR SUPPLY CONTROL
- D.
NONE OF THE ABOVE
Correct Answer
A. IT KEEPS AIR IN THE TRACTOR IF THE TRAILER BREAKS AWAY OR DEVELOPS A BAD LEAK -
- 7.
WHEN WILL THE TRACTOR PROTECTION VALVE CLOSE AUTOMATICALLY?
- A.
WHEN YOU PUSH IN THE TRAILER AIR SUPPLY CONTROL
- B.
WHEN THE AIR PRESSURE IS LOW (20 TO 45 PSI)
- C.
WHEN THE AIR PRESSURE IS TOO HIGH (80 TO 100 PSI)
- D.
WHEN THE EMERGENCY BRAKES ARE TURNED ON
Correct Answer
B. WHEN THE AIR PRESSURE IS LOW (20 TO 45 PSI) -
- 8.
WHAT IS THE PURPOSE OF THE TRAILER AIR SUPPLY?
- A.
TO SUPPLY CONTROL TO THE AIR SUPPLY
- B.
TO CONTROL AIR SUPPLY TO THE PROTECTION VALVE
- C.
TO SUPPLY THE TRAILER WITH AIR
- D.
TO SUPPLY AIR TO THE TRACTOR CONTROL
Correct Answer
C. TO SUPPLY THE TRAILER WITH AIR -
- 9.
WHAT IS THE PURPOSE OF THE SERVICE AIR LINE?
- A.
TO SERVICE THE TRACTOR AIR BRAKES
- B.
TO SERVICE THE AIR CONTROL SUPPLY
- C.
TO CARRY AIR TO THE TRACTOR BRAKES
- D.
TO CARRY AIR TO THE TRAILER BRAKES
Correct Answer
D. TO CARRY AIR TO THE TRAILER BRAKES -
- 10.
WHAT IS THE PURPOSE OF THE EMERGENCY AIR LINE?
- A.
TO SUPPLY AIR TO THE TRAILER AIR TANKS
- B.
TO CONTROL THE EMERGENCY BRAKE ON COMBINATION VEHICLES
- C.
BOTH OF THE ABOVE
- D.
NEITHER OF THE ABOVE
Correct Answer
C. BOTH OF THE ABOVE -
- 11.
WHAT IS THE USUAL COLOR FOR THE EMERGENCY LINE COUPLERS?
- A.
RED
- B.
WHITE
- C.
BLUE
- D.
GREEN
Correct Answer
A. RED -
- 12.
WHY SHOULD YOU LOCK THE AIR HOSE COUPLERS TO EACH OTHER WHEN NOT IN USE?
- A.
TO KEEP THE AIR SUPPLY CONSTANT
- B.
TO KEEP DIRT AND WATER OUT OF THE LINE
- C.
TO KEEP THE RUBBER SEALS SUPPLE
- D.
ALL OF THE ABOVE
Correct Answer
B. TO KEEP DIRT AND WATER OUT OF THE LINE -
- 13.
ON AN OLD TRAILER WITHOUT SPRING BRAKES, WHAT HAPPENS WHEN YOU CROSS THE AIR LINE?
- A.
THE BRAKE PEDAL WILL NOT WORK
- B.
YOU COULD DRIVE AWAY, BUT HAVE NO TRAILER BRAKES
- C.
THE HAND VALVE WILL CAUSE THE TRAILER BRAKES TO COME ON WHEN YOU USE THE AIR BRAKES
- D.
THE EMERGENCY BRAKES WILL COME ON
Correct Answer
B. YOU COULD DRIVE AWAY, BUT HAVE NO TRAILER BRAKES -
- 14.
MOST TRAILERS BUILT BEFORE 1975 HAVE NO PARKING BRAKES BECAUSE:
- A.
THEY DON'T HAVE AIR BRAKES
- B.
THEY DON'T HAVE SPRING BRAKES
- C.
THEY USE THE SERVICE BRAKE FOR A PARKING BRAKE
- D.
SHUT-OFF VALVES WERE NOT AVAILABLE YET
Correct Answer
B. THEY DON'T HAVE SPRING BRAKES -
- 15.
WHAT HAPPENS IMMEDIATELY IF THE SERVICE AIR LINE COMES APART WHILE DRIVING, BUT THE EMERGENCY LINE IS OKAY?
- A.
NOTHING IS LIKELY TO HAPPEN UNTIL YOU PRESS THE BRAKES
- B.
THE EMERGENCY TRAILER BRAKES WILL COME ON IMMEDIATELY
- C.
THE SAME THING AS WHEN THERE'S A LEAK IN THE EMERGENCY LINE
- D.
THE EMERGENCY TRACTOR BRAKE WILL COME ON
Correct Answer
A. NOTHING IS LIKELY TO HAPPEN UNTIL YOU PRESS THE BRAKES -
- 16.
WHY SHOULD THE FIFTH WHEEL BE COMPLETELY GREASED?
- A.
TO MAKE IS EASY TO COUPLE
- B.
TO MAKE IT EASY TO UNCOUPLE
- C.
TO PREVENT STEERING PROBLEMS
- D.
TO PREVENT RUST AND CORROSION
Correct Answer
C. TO PREVENT STEERING PROBLEMS -
- 17.
IN COUPLING, WHEN IS THE TRAILER AT THE RIGHT HEIGHT?
- A.
IN FRON OF THE KINGPIN
- B.
SLIGHTLY OFF LINE WITH THE TRACTOR
- C.
DIRECTLY IN FRONT OF THE TRAILER
- D.
AT MORE THAN A 5 DEGREE ANGLE WITH THE TRAILER
Correct Answer
C. DIRECTLY IN FRONT OF THE TRAILER -
- 18.
IN COUPLING, WHEN IS THE TRAILER AT THE RIGHT HEIGHT?
- A.
THE END OF THE KINGPIN IS EVEN WITH THE TOP OF THE FIFTH WHEEL
- B.
THE KINGPIN IS AN INCH ABOVE THE FIFTH WHEEL
- C.
WHEN THE TRAILER LANDING GEAR IS FULLY EXTENDED
- D.
WHEN THE TRAILER WILL BE LIFTED SLIGHTLY WHEN THE TRACTOR CONNECTS
Correct Answer
D. WHEN THE TRAILER WILL BE LIFTED SLIGHTLY WHEN THE TRACTOR CONNECTS -
- 19.
IN COUPLING, JUST BEFORE THE TRACTOR IS COUPLED WITH THE TRAILER YOU SHOULD:
- A.
PUSH IN THE TRACTOR PROTECTION VALVE
- B.
CHOCK THE TRAILER WHEELS
- C.
CONNECT THE EMERGENCY AND SERVICE AIRLINES
- D.
GREASE THE FIFTH WHEEL
Correct Answer
C. CONNECT THE EMERGENCY AND SERVICE AIRLINES -
- 20.
IN COUPLING, JUST BEFORE THE TRACTOR IS COUPLED WITH THE TRAILER YOU SHOULD:
- A.
FLUSH ALL MOISTURE FROM THE SYSTEM
- B.
WAIT UNTIL THE AIR PRESSURE IS NORMAL
- C.
THE TRACTOR PROTECTION VALVE
- D.
REMOVE THE CHOCKS FROM THE TRACTOR WHEELS
Correct Answer
B. WAIT UNTIL THE AIR PRESSURE IS NORMAL -
- 21.
IN COUPLING, HOW CAN YOU MAKE SURE THE AIR LINES ARE NOT CROSSED?
- A.
THE TRACTOR WILL MOVE EASILY FORWARD AND BACK
- B.
PUMP THE BRAKE AND YOU WILL HEAR THE BRAKES MOVE AND AIR ESCAPE
- C.
THE TRACTOR PROTECTION VALVE WILL POP OUT
- D.
ALL OF THE ABOVE ARE WAYS TO BE SURE THE LINES AREN'T CROSSED
Correct Answer
B. PUMP THE BRAKE AND YOU WILL HEAR THE BRAKES MOVE AND AIR ESCAPE -
- 22.
IN COUPLING, BEFORE YOU BACK UNDER THE TRAILER, HOW DO YOU LICK THE TRAILER BRAKES?
- A.
PUSH AIR SUPPLY KNOB IN
- B.
RELEASE THE AIR BRAKES
- C.
PULL OUT THE AIR SUPPLY KNOB
- D.
PUT THE TRACTOR PROTECTION VALVE IN "NORMAL" POSITION
Correct Answer
C. PULL OUT THE AIR SUPPLY KNOB -
- 23.
HOW DO YOU CHECK THE SECURITY OF THE KINGPIN AND THE FIFTH WHEEL CONNECTION?
- A.
BACK UP 10 TO 20 YARDS
- B.
PULL FORWARD SHARPLY AND RELEASE THE TRAILER BRAKE
- C.
PULL FORWARD SLOWLY, TURNING LEFT AND RIGHT
- D.
PULL AHEAD GENTLY WITH THE TRAILER BRAKES LOCKED
Correct Answer
D. PULL AHEAD GENTLY WITH THE TRAILER BRAKES LOCKED -
- 24.
WHEN YOU INSPECT THE COUPLING, HOW MUCH SPACE SHOULD THERE BE BETWEEN UPPER AND LOWER FIFTH WHEEL?
- A.
YOU SHOULD BE ABLE TO SEE THE LIGHT THROUGH THE OPENING
- B.
ABOUT ONE-HALF INCH
- C.
ABOUT ONE-FOURTH INCH
- D.
THERE SHOULD BE NO SPACE
Correct Answer
D. THERE SHOULD BE NO SPACE -
- 25.
WHICH PART OF THE KINGPIN SHOULD THE LOCKING JAWS OF THE FIFTH WHEEL CLOSE AROUND?
- A.
THE SHANK
- B.
THE BASE
- C.
THE HEAD
- D.
THE FLANGE
Correct Answer
A. THE SHANK -
- 26.
FOR THE COUPLING TO BE COMPLETE, THE SAFETY CATCH FOR THE FIFTH WHEEL LOCKING LEVER MUST BE:
- A.
UNDER THE LOCKING GEAR
- B.
OVER THE LOCKING GEAR
- C.
BEHIND THE LOCKING GEAR
- D.
STRAIGHT UP
Correct Answer
B. OVER THE LOCKING GEAR -
- 27.
WHAT DO YOU DO IF THE FIFTH WHEEL LOCKING LEVER IS ALMOST IN THE LOCK POSITION, BUT WON'T LOCK?
- A.
DON'T WORRY; YOU CAN DRIVE BECAUSE THE LOCKING LEVER IS FOR EMERGENCY ONLY
- B.
DON'T DRIVE, AND HAVE IT REPAIRED
- C.
KEEP TRYING
- D.
DRIVE, BUT DON'T JERK OR TURN SHARPLY
Correct Answer
B. DON'T DRIVE, AND HAVE IT REPAIRED -
- 28.
AFTER YOU HAVE COUPLED, WHAT DO YOU DO WITH THE FRONT TRAILER SUPPORTS?
- A.
RAISE THEM TO THE DRIVE POSITION
- B.
TAKE THEM OFF AND STORE THEM
- C.
TAKE THEM OFF AND SECURE TO THE TRAILER
- D.
YOU RAISE THEM FULLY AND SECURE THE CRANK HANDLE
Correct Answer
D. YOU RAISE THEM FULLY AND SECURE THE CRANK HANDLE -
- 29.
WHEN THE FRONT TRAILER SUPPORTS ARE UP AND THE TRAILER IS RESTING ON THE TRACTORM THERE SHOULD BE CLEARANCE:
- A.
BETWEEN THE TRACTOR FRAME AND LANDING GEAR
- B.
BETWEEN THE TOPS OF THE TIRES AND THE NOSE OF THE TRAILER
- C.
BOTH A AND B ARE CORRECT
- D.
NEITHER A OR B ARE CORRECT
Correct Answer
C. BOTH A AND B ARE CORRECT -
- 30.
WHAT IS THE AIR LEAKAGE RATE FOR A COMBINATION VEHICLE WITH THE ENGINE AND BRAKES OFF?
- A.
LESS THAN 1 PSI PER MINUTE
- B.
LESS THAN 2 PSI PER MINUTE
- C.
LESS THAN 3 PSI PER MINUTE
- D.
LESS THAN 4 PSI PER MINUTE
Correct Answer
C. LESS THAN 3 PSI PER MINUTE -
- 31.
WHAT IS THE MAXIMUM AIR LEAKAGE RATE FOR A COMBINATION VEHICLE WITH THE ENGINE OFF AND THE BRAKES ON?
- A.
1 PSI PER MINUTE
- B.
2 PSI PER MINUTE
- C.
3 PSI PER MINUTE
- D.
4 PSI PER MINUTE
Correct Answer
D. 4 PSI PER MINUTE -
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Mar 16, 2022Quiz Edited by
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Sep 30, 2009Quiz Created by
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