Make sure you can hear air escaping with the valve closed. Either the front or the rear brakes will not work properly or fully. C. make things look larger and closer to you than they really are, When hauling triple trailers at a speed less than 40 mph, you should leave at least _____ second(s) for every ten feet of your truck between you and the vehicles ahead of you. C. foot pedal, Which of these statements about managing space to the sides is true? If not, there is a problem. What does the drivers manual say about how much space you should keep ahead of your truck? then there is a problem with the ABS system. With the red knob pushed in on the tractor dash, the service line should have air in it. Shut-off valves (also called "cut-out cocks") are used in the service and supply air lines at the back of trailers used to tow other trailers. To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? Do converter dollies have spring brakes? On double and triple combinations, you must make sure that which of these is secure? We have a new version of this program. You are driving a 100-feet truck with double trailers at 50 mph. Florida CDL Handbook | FL CDL Handbook Coupling & Uncoupling for axle will have spring brakes due to the weight of the unit. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. You should keep at least _____ seconds of space ahead of you. 6. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. CDL Doubles & Triples Practice Test 3 - Classic Mode - Trucker Country If you do, there is a problem. Why should you use chocks when parking a trailer without spring brakes? A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. The number and size of air tanks varies among vehicles. But the brakes will hold only as long as there is air pressure in the trailer air tank. When coupling twin trailers, a converter dolly is. (done) Chp 23: Cash Flow + Working Capital, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. The converter dolly air tank drain valve on coupled double/triple trailers should be: You are driving a 100-feet truck with double trailers at 50 mph.
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