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Converter Dollies are used to connect:
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To uncouple the rear trailer in a set of doubles. The shut-off valve at the rear of the front trailer should be:
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Double&Triple

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Converter Dollies are used to connect: A tractor-trailer combination to another trailer.
To uncouple the rear trailer in a set of doubles. The shut-off valve at the rear of the front trailer should be: Closed.
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: Air escape from the open valve.
Which of these action is not a good thing to do when driving on slippery roads? Use the engine brake or speed retarder.
You can release the dolly brakes by: Opening the air tank petcock.
Which of these actions will result in the best control on a curve? Slow to a safe speed before entering the curve, then accelerate slightly through it.
You cannot avoid driving through deep of flowing water. You should not: Driving through quickly and for a short distance after coming out of water.
A converter dolly is still under the second trailer when you unlock the pintle hook. What is likely to happen? The dolly tow bar may fly up.
To check that the converter dolly is securely coupled to the rear trailer, you should: Pull gently against the pin of the second semi-trailer.
When you drive a set of doubles or triple trailers, you need more space because they: Can't be stopped or turned quickly.
Some large trucks have convex or "spot" mirrors. These mirrors: Make thing look smaller and farther away than they really are.
You are driving 35 mph with a set of double trailers. You should leave at least __ second(s) of space in front of your vehicle for every ten feet of vehicle length : 1.
Which of these statements is true about emergency steering? A move to the right may still be best if you have traffic on both sides of your vehicle.
You are driving with a set of double trailers. You need to use your brakes to avoid a crash. For emergency braking you should use: Controlled or stab braking.
You are inspecting a double or triple trailer rig. You should be sure the converter dolly air tank drain valves are ___ and the pintle hook is ___: Closed, latched.
Which of the following is the correct position for shut-off valves for a set of doubles or Triples? Open for the rear of the front trailers and closed for the rear of the last trailer.
What is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? The dolly tow bar may fly up.
When uncoupling the rear semi-trailer, you should lower the converter dolly landing gear: Enough to remove some of the weigh from the dolly.
A safe driving speed on a curve for a normal tractor trailer: May be too fast for a set of double or triples.
Which of these statements is true? A set of doubles or triples must be driven very smoothly to avoid a rollover of jackknife.
When driving a truck with more then one trailer, which trailer should be first behind the tractor? The heaviest.
How can you be sure you supplied air to a second trailer? Go to the rear of the second trailer and open the emergency line shut-off.
If you want to couple a second trailer to your combination vehicle, secure it by using: Either of the above, if available.
You are driving a 100 foot twin trailer combination at 50 mph. The road is dry and the visibility is good. You should keep at least ___ seconds of space ahead of your vehicle 11.
Driving a truck with a set of doubles or triples requires the driver to: Allow more following distance than for smaller vehicles.
You want to lock your combination to a second trailer that has no spring brakes. To do this without wheel chocks you should: Charge the trailer air tank and then disconnect the emergency line.
When you inspect a set of coupled doubles or triples, make sure the pintle hooks are: latched.
A converter dolly has: A separate air supply tank.
The converter dolly air tank drain valve on couples double and triple trailers should be: Closed.
When testing the coupling of double trailers, the landing gear of the rear trailer should be: Slightly raised.
Empty trucks: May have poor traction due to bouncing and wheel lock up.
Which of these statements is true? When coupling a set of doubles or triples, be sure the pintle eye of the dolly is in the proper place.
Which of these statements is true about seeing ahead? Good drivers shift their attention back and forth near and far.
During normal operation, the brakes on a set of double or triples trailers are controlled by the: Foot pedal.
The best way to stop any skid is to: Restore traction to the tires.
Which of these statements is true about quick steering movements with a set of doubles or triples? A set of doubles or triples turn over more easily than other vehicle combinations.
Which of these statements is true about speed management and braking? you need about four times as much stopping distance at 40 mph as you need at 20 mph
For coupled double or triple trailers, all of the converter dolly shut-off valves should be: open.
Before you can supply air to the air tanks of a second trailer you need to: Open the shut-off valves at the rear of the first trailer and closed the shut-off valves at the rear of the second trailer.
Which of these statements is true about checking your mirrors? Use the mirrors to look for tire fires.
Check trailer height before connecting a converter dolly to a second or third trailer. The trailer height is correct when the: Trailer raises slightly when the converter dolly is backed under it.
You are driving on a slippery road during the day. What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? Allow "much more space" than is needed for ideal driving conditions.
You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking you should: Use controlled or stab braking.
Converter dollies: Often do not have spring brakes.
The crack the whip effect that troubles trucks with trailer. Which is most likely to tip over: The rear trailer of a triple.
When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? never.
You are visually checking the coupling of a converter dolly to the rear trailer. How much space should be between the upper and lower fifth wheel? There should be none.
Which of these statements about quick steering movements and doubles/ triples is true? Doubles/ triples flip over from quick steering moves more easily than many other vehicles.
You are driving a 100 foot twin trailer combination at 30 mph. The road is dry and the visibility is good. You should keep at least ___ seconds of space ahead of your vehicle 10
The best way to keep brakes from overheating while going down a steep grade is to: Go 5 m.p.h. below your safe speed.
If you must drive through deep puddles or flowing water, which of these should you not do? Drive though quickly.
Which of these statements about seeing ahead is true? 1. At highway speed, you should look up to 1/4 mile ahead of your truck. 2. Many drivers do not look far enough ahead of their trcuk. 3. Good drivers shift their attention back and forth, near and far.
When should you check your mirrors while making a lane change? 1. After signaling the change 2. Right after starting the lane change 3. After completing the lane change
Which of these statements about handling of doubles and triples is true? A sudden movement with the steering wheel can result in a tipped over rear trailer.
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: The trailer will be raised slightly when the converter dolly is backed under it.
You want to hook your combination to a second trailer that has no spring brakes. To do this without wheel chocks you should: Supply air to the trailer air system with the tractor and then disconnect the emergency line.
Which of these will result in the best control on curves? Slowing to a safe speed before entering the curve, then accelerate slightly during the curve.
When driving with more than one trailer, which trailer should be the first one behind the tractor? The heaviest trailer.
Driving a truck with a set of doubles or triples requires the driver to: 1. Use special care in bad weather and mountain conditions 2. Allow more following distance than for smaller vehicles
Empty trucks may have poor traction due to ______ and wheel _______. 1. bouncing 2. lockup
If you want to couple a second trailer to your combination vehicle, secure it by using: Either 1. The trailer's spring brakes and emergency air brakes 2. Wheel chocks.
The best way to stop all skids is to: The best way to stop all skids is to.
Q. 1. At highway speed, you should look up to ___ mile ahead of your truck 2. Many drivers do not ___________ _________ of their truck. 3. Good drivers shift their attention ____and forth, ____ and ___. 1. 1/4 2. look far enough ahead 3. back and forth, near and far
A _______ movement with the steering wheel can result in a _______ rear trailer. 1. sudden 2. tipped over
These statements about managing space to the side is true? You should avoid traveling next to others when ever possible.
You are driving a set of doubles. A set of trailer wheels goes into a skid. Which of these is most likely to occur? You will have a trailer jackknife.
How can you be sure that you supplied air to a second trailer? Go to the rear of the second trailer and open the emergency line shut off.
WHEN COMPLETELY HOOKED UP TO A SET OF DOUBLES, HOW DO YOU CHECK YOUR AIR LINES? Chock your wheels, release brakes, open shut off valves at the rear of the second trailer.
Created by: kok777
 

 



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