Open, free True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. Make sure pintle hook is latched. the trailer will be raised slightly when the converter dolly is backed under it the best way to keep brakes from getting too hot while going down long grades is to : go slow and use only light, steady pressure on the brakes you are driving a 100ft truck with double trailers at 30mph. when testing the coupling of a double trailer the landing gears of the rear trailer should be, you must drive through deep or flowing water . You should keep at least ____ seconds of space ahead of you. There is a school zone ahead. Some large trucks have curved (convex or spot) mirrors. When driving a truck with more than one trailer, which trailer should be first behind the truck? The rear trailers shut-off valves should be closed and the front open. The rear trailer of a double Which of the following is true about loading cargo into double or triple trailers? C. if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right may still be best, To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: B. keep other traffic out of your side space Page 7-6 Commercial Driver's Manual/2.0 = Be sure air lines are supported and glad hands are properly connected. The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. (done) Chp 23: Cash Flow + Working Capital, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. 11 During normal operation the brakes of the double/triple trailer are controlled by: You are driving at night and you must dim your headlights for traffic. 0000007508 00000 n C. When coupling doubles and triples, be sure that the pintle-eye of the dolly is in place in the pintle hook of the trailer, You are driving on a slippery road during the day. which of these statements about quick steering movements and doubles/triples is true? 8. When you uncouple twin trailers, the last step is to Converter dollies You want to hook your combination to a second trailer that has no spring brakes. All rights reserved 2022 TestPermit.com, CDL Doubles and Triples Test Question and Answers, Divided Highway Sign: Meaning, Quiz Definition, Example, Shape, Location, Color, Narrow Bridge Sign: Meaning, Quiz Definition, Example, Shape, Location, Color, STOP Sign 2023 Meaning, Quiz Definition, Example, Shape, Location, Color, Crossbuck Sign: Meaning, Definition, Example, Shape, Location, Color, Georgia CDL Permit Practice Test 2023 Study Guide [PDF], Georgia Motorcycle Permit Test 2023 with Study Guide [PDF], Georgia Permit Test 2023 (DDS Practice Test UPDATED), Georgia ADAP Practice Test 2023 Questions Answers Online, Ohio CDL Permit Practice Test 2023 Study Guide [PDF], Ohio Motorcycle Permit Test 2023 Study Guide [PDF]. B Doubles/Triples Endorsement Flashcards | Quizlet Time used (Requires timer add on). the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. A Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? The road is dry and visibility is good. Explain why the waves that reflect from the far left edge of the plates in the given figure earlier exhibit destructive interference (zero intensity) at x=0x=0x=0. Tractor-trailers are considered combination vehicles. You should keep at least ___ seconds of space ahead of you. Correct answer percentage. symptoms of a bad fuel tank selector switch. The heaviest trailer 1) the first one is to pump down the air pressure in the system between 20 and 45psi (pounds per square inch) the trailer air supply will pop out, shutting air off to the trailer. Be sure air-lines are supported and glad hands are properly connected. Park on level ground, put chock on the tires, and charge the air tank. When coupling twin trailers, a converter dolly is. A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. When you do this, you should hear: Make sure you have large enough gaps before entering or crossing traffic. If there is air there, then there is air towards the cab You want to hook up to the first trailer, then the converter dolly while it is lined up in A converter dolly is still under the second trailer when you unlock the pintle hook. 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. Converter dollies: A. use the engine brake or speed retarder Push the brake pedal as hard as you can and hold it there A What will happen if there is a major leak in the service air line? You want to lock your combination to a second trailer that has no spring brakes. In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. The converter dolly air tank drain valve on coupled double/triple trailers should be: Closed. Be certain you are clear at the sides before changing lanes. C. fully raised, Which of these statements about speed management and braking is true? 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. You should hear air escaping, showing the entire system is charged. Study section 6.2 if you can't answer all of these questions. Each tank has a drain valve on it, and you should drain each tank every day. A bent or damaged kingpin on a coupling should be? rear trailer. If you want to couple a second trailer to your combination vehicle, secure it by using: The crack-the-whip effect that troubles trucks with trailers is most likely to cause a tip over: You are driving on a slippery road during the day. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. For emergency braking you should: You are driving with more than one trailer. C Also available in App Store & Google Play. If you feel Check them all. When uncoupling a rear trailer, your rig should be parked in a straight line on? A dolly has lights, air tanks, air relays, air lines, air brakes, ABS, electrical connections, etc. Number of wrong answers. What should you check for when inspecting a converter dolly - Answers you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. be coupled to the rear of a tractor-trailer combination forming a hexagon bottom rig, A coupling device of one or two axles and a fifth wheel by which a semitrailer can be For emergency braking you should: May have poor traction due to bouncing and wheels lockup. Your vehicle is so long that you must swing wide to make the turn. to re-capture it. Doubles/Triples Air Brake Check - digital.ncdcr.gov Please use the form below to contact our customer service or sales team. When inspecting the air brakes on doubles and triples, you wait for air pressure to reach normal, then push in the red trailer air supply knob. A some large trucks have curved (convex or spot) mirrors. A-dolly. Remember however, that is just a suggestion. B You have not finished your quiz. The weight of the individual trailers will have no noticeable effect on the handling of the vehicle, The weight of all trailers should be nearly the same, within 2% of each other. C 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 trailers. This section explains how important it is to be careful when driving with more than one trailer, how to couple and uncouple correctly, and about inspecting doubles and triples carefully. Which of these statements about quick steering movements and doubles/triples is true? If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). You are driving with double trailers and must use your brakes to avoid a crash. Seriously! The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. 10. You can find it here: High Road 2.0. For emergency braking you should: You are doing a walk around inspection of a double or triple trailer rig. 0000004689 00000 n Eventually, the air will leak away, and then there will be no brakes. This would be very dangerous. For emergency braking you should: A Push the brake pedal as hard as you can and hold it there B When coupling, be sure to couple the proper glad hands together. P0420 code honda odyssey 2011 - pjigzp.wikifit.it air throughout the system. DOUBLE/TRIPLE CDL Flashcards | Chegg.com The crack the whip effect that troubles trucks with trailers. second trailer will be connected, The dolly will have a yellow lamp on the left side, The dolly will have a yellow lamp on the right side, The dolly will have a red lamp on the left side, The dolly will have a red lamp on the right side. You can test that air is flowing to all trailers by opening? unsafe slow down even further, or better yet, find a safe haven and park until the how much space should be between the upper and lower fifth wheel? 11 During normal operation the brakes of the double/triple trailer are controlled by: The rear trailers shut-off valves should be open and the front closed. 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. Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. CDL License Requirements State By State. We have a new version of this program. 0000006015 00000 n Make a sketch that explains this phenomenon in terms of a feedback loop . 2. The dolly tow bar may flip up causing bodily injury and making it very difficult to A coupling device of one or two axles and a fifth wheel by which a semitrailer can be coupled to the rear of a tractor-trailer combination forming a double bottom rig Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? While it is general practice to make blue the service line, red the emergency line, and green the electrical line, these colors are not required by any laws or regulations. If you do, the brakes may not work correctly. Question 4. on kingpin. The rear trailer does not have shut-off valves. You are driving a 100-feet truck with double trailers at 30 mph. The emergency brakes come on whenever air pressure in the emergency line is lost. you are driving on a slippery road during the day. 0000008187 00000 n You should not hear air escaping. A. use a low gear recouple. Make sure trailer height is correct. 0000001375 00000 n C. always keep your vehicle to the left side of your lane, When testing the coupling of double trailers, the landing gear of the rear trailer should be: At section 2 downstream, the speed is 519 m/s. None of the above, 2. What do you check when making a visual check of coupling? To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? The final procedure when connecting a rear trailer is to? Speed for other vehicles is often too fast for a multi-combination unit! 0000001354 00000 n What three methods can you use to secure a second trailer before coupling? What value of channel width must the design use? A. you can steer more quickly and safely if you hold the wheel with one hand Lock pintle hook. Each trailer and converter dolly has one or more air tanks. The Doubles and Triples written CDL Exam is required for your doubles and triples endorsement. Free CDL - Doubles and Triples Flashcards | Quizlet This has the same value as the %%SCORE%% Variable on the Final Screen. A. use light, steady pressure on the brake pedal The dolly tow bar may fly up A full trailer behind a truck Hazardous materials must be placarded on all four sides of EACH Trailer. How do you know if your converter dolly is equipped with antilock brakes? Because of this, which of the following vehicle parts is most likely to tip over? You must stop, yield to traffic and pedestrians, and only proceed when safe. Some do. Select the answer that correctly completes each statement. 0000008894 00000 n go to the rear of the second trailer and open the emergency line shut off, before you can supply air to the air tanks of the second trailer you need too, open the shut-off valves at the rear of the first trailer & close the shut-off valves at the rear of the second trailer. CDL: Doubles/Triples Flashcards | Quizlet View the price and details of this FINSBURY PUMP SYSTEMS 400L (SINGLE STAGE) 5.5HP HONDA GX PETROL ENGINE (18M HOSE) FIRE WATER TANK | Mobile fire units.
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