Sunny Truck Driving School - Online Test

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Double Triple Test

Q. 1) 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 kingpin rests on the fifth wheel
b) The trailer will be raised slightly when the converter dolly is backed under it
c) The center of the kingpin lines up with the locking jaws

Q. 2) Which of these statements about managing space to the sides is true?
a) All of these answers are correct
b) Always keep your vehicle to the right side of your lane
c) High winds are not a problem for doubles and triples
d) You should avoid traveling next to others when possible

Q. 3) If you must rive through deep puddles or flowing water, which of these should you not do?
a) Use a lower gear
b) Increase engine RPM
c) Take advantage of water and let it wash your tires etc
d) Drive through quickly

Q. 4) Converter dollies:
a) Usually need a glad hand converter
b) Have little braking power because they are small
c) Often do not have spring brakes

Q. 5) The best way to stop all skids is to:
a) Counter steer and accelerate
b) Use stab or controlled braking
c) Restore traction to the tires
d) Steer and brake hard

Q. 6) The best way to keep brakes from overheating while going down a steep grade is:
a) Use only the trailer brakes
b) Use stab braking
c) Use counter steering practices
d) Go 5MPH below your safe speed

Q. 7) 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:
a) The service brakes slowly move to fully applied position
b) Air escape from the open valve
c) The emergency line valve open and release air

Q. 8) How can you be sure you supplied air to a second trailer?
a) Apply the hand valve at 10 MPH. you should stop in the same distance as a truck with one trailer at 5MPH
b) Go to the rear of the second trailer and open the emergency line shut off
c) Get out and listen for air flowing through the lines
d) Watch each trailer's air gauge for a drop of 30 psi

Q. 9) Empty trucks:
a) Stop in the same distance as a fully loaded one
b) Are the easiest to stop since there is no shifting load
c) Require shorter stopping distances than full ones
d) May have poor traction due to bouncing and wheel lockup

Q. 10) You want to hook your combination to a second trailer that has no spring brakes. To do this without wheel chocks you should:
a) Hook the trailer electric cord to portable generator for braking power
b) Supply air to the trailer air system with the tractor and then disconnect the emergency line
c) Couple the trailer to the tractor, everything is ok
d) Make sure the trailer will roll freely when coupling

Q. 11) Before you can supply air to the air tanks of a second trailer you need to:
a) Open the shut off valve at the rear of the first trailer, and close the shut off valve as the rear of the second trailer
b) Close the shut off valve at the rear of both trailers
c) Open the shut off valve at the rear of both trailer

Q. 12) Some large trucks have complex or "spot" mirrors. Spot mirrors:
a) Make things look smaller and farther away than the really are
b) Are against the law in most of the states
c) Make things look longer and closer the really are
d) Do not need to be checked as often as flat mirrors because they show a larger area

Q. 13) 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 controlled or stab braking
c) Use only the trailer brakes

Q. 14) You are driving a set of doubles. A set of trailer wheels goes into a skid. Which of these is most is likely to occur?
a) The rig will stay in a straight line no matter how much steering wheel is turned
b) You will have a trailer jackknife
c) The rig will stay in a straight line but slide sideways

Q. 15) You are visually checking the coupling of a converter dolly to the rear trailer. How much space should be between the upper an the lower fifth level?
a) ^1/32 to ^3/32 of an inch
b) It depends on the load
c) ^1/2 to ^3/4 of an inch
d) None

Q. 16) Which of these statements about seeing ahead is true?
a) At highway speed, you should look up to ^1/4 mile ahead of your truck
b) Good drivers shift there attention back and forth, near and forth
c) All these answers are correct
d) Many drivers do not look far enough ahead of their truck

Q. 17) You are driving a 100 foot truck with double trailers at 30 MPH. the road is dry. Visiblity is good. You should keep at least ________ seconds of space in front of you:
a) 10
b) 12
c) 14
d) 8

Q. 18) Which of these statement about handling of doubles and triples is true?
a) A triple bottom rig can stop quicker that a 5 axle tractor semi trailer due to off tracking
b) The rear trailer of a 100 foot triple is less likely to turn over than a single semi trailer due to the crack the whip effect
c) None of these answers are correct
d) A sudden movement with the steering wheel can result in a tripped over rear trailer

Q. 19) The "crack the whip effect" cause GREAT trouble for trucks with trailers. Which is most likely to tip over:
a) A full trailer behind a truck
b) The real trailer of a triple
c) The rear trailer of a double
d) Any trailer

Q. 20) If you want to couple a second trailer to your combination vehicle, secure it by using: Wheel chocks
a) Wheel chocks
b) both these answers are correct if available
c) The trailer's spring brakes and emergency brakes

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