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. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. Blue is used for the service lines, and red for the emergency (supply) lines. B. slightly open The A-dolly has a single drawbar with a single, centered hitching point. When testing the coupling of the double trailer the landing gears of the rear trailer should be: You want to hook your combination to a second trailer that has no spring brakes. It is important to check the height of the trailer before connecting a converter dolly to a trailer. can and will get stuck on a raised railroad crossing. What's a converter dolly? When checking the fifth wheel, you should make sure that it has enough? 5. If you feel When connecting a converter dolly to a rear trailer, the trailer height must be adjusted so that it is? It is extremely unlikely you will drive a trailer built before 1975, but for the written exam, you still may need to know that trailers built before 1975 were not required to have spring brakes. The lightest trailer The road is dry and the visibility is good. cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. Shut-off valves (at rear of trailers, in service and emergency lines): When pulling doubles or triples, what is important to know about the order of the trailers? Doubles and triples are more likely to turn over than other combination vehicles because of what effect? The driver will be required to complete this requirement in three eight hour shifts. The road is dry and visibility is good. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. 0000010705 00000 n A thorough pre-trip inspection should catch any major service line leaks before you begin your trip. You should keep at least ____ seconds of space ahead of you. Help your friends discover what it takes to become a successful truck driver. True or False? The dolly tow bar may fly up which of these statements about managing space to the sides is true? Air escape from the open valve recouple. 0000010783 00000 n A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. What is a converter dolly? When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? Safety fail-safe features of a tractor-trailer converter dolly. However, converter dollies and trailers built before 1975 are not required to have spring brakes. When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. Park the rear trailer against another trailer, chock the tires and lock the trailer C Our business address is: Attn: Class A Drivers MH Sub I, LLC dba Internet Brands 909 N Pacific Coast Highway, 11th Floor El Segundo, CA 90245. 0000001375 00000 n To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? What does the drivers manual say about how much space you should keep ahead of your truck? B Slow to a safe speed before entering the curve, then coast through the curve. 11 [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. But the brakes will hold only as long as there is air pressure in the trailer air tank. 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. 1/4 in. The dolly tow bar may flip up causing bodily injury and making it very difficult to For emergency braking you should: You are doing a walk around inspection of a double or triple trailer rig. you should check the trailer height before connecting a converter dolly to a second or third trailer. C. slow to a safe speed before entering the curve, then coast through it, Which of these is NOT a good thing to do when driving on slippery roads? If the converter dolly is close to your semitrailer, you should wheel it into position? B What should you check for when inspecting the converter dolly and the pintle hook? inspection of all equipment. C. closed; unlatched, Which of these will result in the best control on a curve? . You should be sure the converter dolly air tank drain . 0000003240 00000 n 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 The heavier trailer should be in the rear. Sometimes, metal tags are attached to the lines with the words service and emergency stamped on them. Which of these is most likely to occur? The Doubles and Triples written CDL Exam is required for your doubles and triples endorsement. allow "much more space than is needed for ideal driving conditions". High Road 2.0! Release Dolly breaks by opening the air tank petcock or if the dolly has a spring break, use the Dolly parking brake control . the fifth wheel, so trailer is raised slightly when dolly is pushed under it. C. use stab or controlled braking, Which of these is true? Locking jaws open If your tanks have automatic drains, they will keep most moisture out, but you should still open the drains to make sure. 0000006195 00000 n You should keep at least ____ seconds of space ahead of you. 0000001775 00000 n You want to lock your combination to a second trailer that has no spring brakes. you should avoid traveling next to others when possible. 21 0 obj << /Linearized 1 /O 23 /H [ 1162 213 ] /L 29759 /E 11109 /N 7 /T 29221 >> endobj xref 21 38 0000000016 00000 n It is very important to keep the air supply clean. on kingpin. The road is dry and visibility is good. Each trailer and converter dolly has one or more air tanks. 0000007508 00000 n What is likely to happen? Seriously! There is more chance for skids and loss of traction. C A. use light, steady pressure on the brake pedal What is the most common foundation brake found on heavy vehicles? You must treat a flashing red signal as you would treat a STOP sign. Dont hesitate to take advantage of our practice tests in each category specific to your needs. C Remember however, that is just a suggestion. How can you test that air flows to all trailers? In the coupling system, the locking jaws should be fixed around? A C. posted speed limits on curves are safe for all trucks, Empty trucks: Chock the tires, park on level ground and charge the trailer air tank if it does Some do. When does the "driver's manual" advise disconnecting the steering axle brakes to help open, closed, closed: Term. Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). when does the drivers manual say you should disable the steering axle brakes? Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. When you do this, you should hear: Which of these statements about emergency steering is true? Some large trucks have curved (convex or spot) mirrors. B. you should avoid traveling next to others whenever possible Air will not be available to release the trailer spring brakes (parking brakes). 27. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. There is a school zone ahead. There is no obligation whatsoever. When driving doubles or triples how should they be driven to avoid rollover or jackknifing: B. johnson bar How do you check to make sure trailer height is correct before coupling? If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). The road is dry and visibility is good. b. cell To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space When uncoupling a rear trailer, you should remove some weight from the dolly by? 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 Any time you have to 0000001162 00000 n B. slow to a safe speed before entering the curve, then accelerate slightly through it When driving a double or triple trailer, greater care must be given to. When uncoupling, you should never unlock the _______ with the dolly still under the rear trailer. 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. Only trailers designed to be pulled with another trailer behind it will have a shut off valve. You open the emergency line shut-off valve at the rear of the last trailer and hear air escaping. A Be certain you are clear at the sides before changing lanes. The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. paramount to safe driving. Open. coupled to the rear of a tractor-trailer combination forming a double bottom rig, Careful of the wording! Allow more following distance. A. brake and downshift in a curve This has the same value as the %%TIME_USED%% Variable on the Final Screen. You will have greater length and more dead axles to pull with your drive axles than other drivers. Eventually, the air will leak away, and then there will be no brakes. A Their drawbars differentiate them. While doing a walkaround inspection of a double or triple, the converter dolly air tank drain valve should be _____, and the pintle hook should be _____. When you're trying to correct a drive-wheel braking skid why should you stop braking? doubles/triples flip flop over from quick steering movements more easily than many other vehicles. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. HK Extended Tank Drain Assembly Kit with 10 Inch Braided Steel Hose 1/4 Inch Drain Valve and Elbow Fitting for Air Compressor 4.7 (463) $1499 FREE delivery Thu, Mar 9 on $25 of items shipped by Amazon Small Business All Tool Depot Air Compressor Drain Valve Replacement for Craftsman Petcock 072-0001, 072-0006 (1-Pack) 4.2 (20) $649 Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? What value of channel width must the design use? 0000006383 00000 n Stay up to date on truck driving industry news. Open the shut-off valves at the rear of the last trailer and listen for air flow. We have a new version of this program. All other trailer air functions use the emergency line. Simply click in your answer to each CDL practice test question. Each trailer and converter dolly has one or more air tanks. True! A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. However there are some states that allow doubles that are each 48 feet in length. If you do cross the air lines, supply air will be sent to the service line instead of going to charge the trailer air tanks. You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? You must check that all shut-off valves are in the open position except the ones at the back of the last trailer, which must be closed. rear trailer. Air Storage and Drain Tanks: Air storage tanks are used to hold compressed air. C. 3, You are doing a walk around inspection of a double or triple trailer rig. Opening the shut off valves on the rear most trailer will ensure the lines are flowing air throughout the system. True! 4. A safe speed on a curve for a straight truck or a single trailer combination vehicle may be too fast for a set of doubles or triples. 0000002636 00000 n Pintle-eye of dolly in place in pintle hook of trailer (s). The word part ferrit- means: Safety should never take second place, so know your stuff! The trailer brakes will unlock When you turn with the tractor/triple trailer combination the wheels that off-track (cheat) the most are: You should check trailer height before connecting a converter dolly to a second or third trailer. Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. Any single vehicle with a GVWR of 26,001 or more pounds, or any such vehicle towing another not in excess of 10,000 pounds. Make sure to visually inspect the fifth wheel and that the locking mechanism is What happens when there is a major leak in the emergency air line? The application only takes one minute. What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? A This has the same value as the %%TOTAL%% Variable on the Final Screen. The coupling between a rear trailer and a dolly should have a space between the upper and lower fifth wheels of? You should hear air escaping, showing the entire system is charged. weather passes. A truckers workspace is a small moving office Read More. 8. _______ should be tested with the hand valve but controlled in normal operation with the foot pedal. your vehicle is so long that you must swing wide to make a turn. They provide the air pressure used to operate trailer brakes. There are two types of converter dollies. Terms in this set (43) Converter dollies are used to connect: A tractor-trailer combination to another trailer. rear brakes will not work properly. How can you test that air flows to all trailers? the trailer height is right when: the trailer will be raised slightly when the converter dolly is backed under it. They are not only longer, but also need more space because they cannot be turned or stopped suddenly. These dollies will have a yellow lamp on the left side of the dolly Questions You Should Know For Doubles And Triples 1. Close the emergency line shut-off valve at the rear of the trailer. 0000002446 00000 n None of the above, 5. The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. Use only the trailer brakes some large trucks have curved (convex or spot) mirrors. Air escape from the open valve B The service brakes slowly move to the fully applied position C The emergency line valve open and release air D None of the above 4. 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]. The last trailer in a combination is most likely to turn over. The road is dry and the visibility is good. Open, latched Before coupling a trailer, you should make sure it is at the right height using? You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. When coupling twin trailers, a converter dolly is. This is CDL Doubles and Triples Test 3in our original Classic Mode. A. locked . It is important not to let water and oil build up in the air tanks. Which of these statements about quick steering movements and doubles/triples is true? Safety chains secured to trailer (s). While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. which of these is not a good thing to do when driving on slippery roads? This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. On double and triple combinations, you must make sure that which of these is secure? [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. How much space should be between the upper and lower fifth wheels? kingpin. 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The pressure in the service line is controlled by the brake pedal and the trailer hand brake. For all brakes to work on a triple combination, you must have air supply? 4. You shouldn't stop braking. NPT thumbscrew style design enables easy installation. The crack the whip effect will topple the rear trailer first. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. This has the same value as the %%SCORE%% Variable on the Final Screen. B. the emergency line valve open and release air you are doing a walkaround inspection of a double or triple trailer rig. during normal operation the brakes of the double/triple trailer are controlled by : which of these will result in the best control on curves? D. Make sure the spare tire is secured, if it has one. In normal operation, trailer service brakes should be operated by? What types of trailers can get stuck on raised crossings? C. fully raised, Which of these statements about speed management and braking is true? Should the shut-off valves on the rear of the last trailer be open or closed? Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. How much space should be between the upper and lower fifth wheel? The lighter trailer should be in the rear. A. closed; latched When doing a walkaround inspection of a double or triple trailer, the shut-off valves should be _______ at the rear(s) of the front trailer(s) and ________ at the rear of the last trailer. Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? If you leave this page, your progress will be lost. Hb```f``b`c``e@ (Q6_* Flammable materials in the front trailer then it must have the placards on that trailer. How should you test the coupling? 2. Converter dollies: You may be timed. you can fuck a pornstar craigslist cars and trucks for sale by owner; kd linear actuator kdpt007 what is ait in the army; native american spiritual cleansing prayer simple spectrum coupon code; . Once that's complete, then its an easy push back and the You are visually checking the coupling of a converter dolly to the rear trailer. 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. then there is a problem with the ABS system. What is one function of the tractor protection valve? A. open slow to safe speed before entering, then accelerate slightly through the curve.