If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen? A The dolly tow bar may fly up B The air lines will rupture C The trailer brakes will unlock D Nothing, the weight of the trailer will keep it in place 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? Previous Test Next Test. Practice Mode Exam Mode. Several customers have reached out to us in the past year looking for a better way to pull semi trailers under unfavorable conditions, here are a few examples: 1.
Squash grower looking to pull a steady 1. Potato grower wanting to expand into semis, away from straight trucks, but not wanting to bruise with extra handling of carts.
Also finding help and hiring enough drivers that are experienced enough to pull semis in sandy fields. Wet conditions in 1st cutting alfalfa and trucks rutting up a crop that would otherwise grow for 3 more cuttings if unharmed. Carrot grower using a crop cart but looking to add another option to keep the harvester going while the crop cart is unloading. Onion grower looking for cost effective way to keep custom haulers semi-tractors out of the field to avoid hefty fees to have haulers enter the field.
Grower who stores grain in Ag Bags out in the field but mud and snow conditions are unfavorable to bring a semi out in the field. At normal pressure. After connecting the air lines but before backing under the trailer, you should: a. Supply air to the trailer system, then pull out the air supply knob. Walk around the rig to be sure that it is clear.
How should you test the tractor-semi-trailer connection for security? Rock the trailer back and forth with the trailer brakes locked. Pull gently forward in low gear against the locked trailer brakes then look at it carefully. Put the tractor in gear and pull ahead with a sharp jerk.
Look at it carefully. You are coupling a semi-trailer to your tractor but have not yet backed under. The trailer is at the right height when: a. It will be raised slightly when the tractor is backed under it. The end of the kingpin is even with the top of the fifth wheel. Its front supports are fully extended. After you lock the kingpin into the fifth wheel, you should check the connection by: a.
Pulling forward 50 feet, turning right and left. Backing up with the trailer brakes released. Pulling the tractor ahead sharply to release the trailer brakes. Pulling the tractor ahead gently with the trailer brakes locked.
How much space should be between the upper and lower fifth wheel after coupling? Just enough to see light through it. The Fifth Wheel locking lever is not locked after the jaws close around the kingpin. This means that: a. The trailer will not swivel on the fifth wheel. The coupling is not right and should be fixed before driving the coupled unit. The parking lock is off and you may drive away.
You can set the fifth wheel for weight balance. Which part of the kingpin should the locking jaws close around? The shank. The base. The head. It does not matter. Over the locking lever. Under the locking lever. Straight up. Through the locking lever. You have coupled with a semi-trailer. Where should you put the front trailer supports before driving away? Fully raised with the crank handle secured in its bracket. The front trailer supports are up and the trailer is resting on the tractor.
Make sure: a. There is enough clearance between the tractor frame and the landing gear. There is enough clearance between the tops of the tractor tires and the nose of the trailer. Neither a nor b is correct. Both a and b are correct. You have pushed in the trailer supply valve. You should not move the tractor until the whole air system is: a. Flushed of all moisture. When a vehicle goes around a corner, the rear wheels follow a different path than the front wheels.
This is called: a. Sidewinding b. Jack-knifing c. Offtracking d. Clutch Pedals c. Hose Couplers d. Trailer Tanks. Shut-off Valves b. Parking Brakes c. Hose Couplers.
Red ; Blue d. Red ; Blue Off-roading c.
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