the converter dolly air tank drain valve should be the converter dolly air tank drain valve should be

Safety fail-safe features of a tractor-trailer converter dolly. King pin. For emergency braking you should: All other trailer air functions use the emergency line. When uncoupling the converter dolly Why should you never unhook the If the air supply in the trailer air tank has leaked away, there will be no emergency brakes, and the trailer wheels will turn freely. 2003-2023 Chegg Inc. All rights reserved. You should check the height of the trailer before connecting a converter dolly to a second or third trailer. you want to hook your combination to a second trailer that has no spring brakes. Take special care when pulling two and three trailers. Amazon.com: Air Tank Drain Valve C. fully raised, Which of these statements about speed management and braking is true? 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. 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. What value of channel width must the design use? You are driving with double trailers and must use your brakes to avoid a crash. They are filled by the emergency (supply) line from the tractor. However there are some states that allow doubles that are each 48 feet in length. Charge the system and pump the brakes with the window down. D If loading fails, click here to try again. When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? some large trucks have curved (convex or spot) mirrors. the converter dolly air tank drain valve on couple double/triple trailers should be: to check if the converter dolly is securely coupled to the rear trailer you should: pull gently against the pin of the second trailer. Which f these will result in the best control on curves? If you do, there is a problem. A. always keep your vehicle to the right side of your lane A thorough pre-trip inspection should catch any major service line leaks before you begin your trip. 8. Open ), a 15 year truck driving veteran, in January 2007. True! axle will have spring brakes due to the weight of the unit. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. Check them all. Locking jaws closed on You are driving a tractor with multiple trailers. Describe what the trailer air supply control does. Try our free CDL Doubles and Triples Test Question and Answers Quiz online. You are driving a 100 ft twin trailer combination at 50 mph. Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? 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. CDL Doubles and Triples Test Question and Answers Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? 0000010705 00000 n You need to brake in order to regain control. Stay up to date on truck driving industry news. To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and Locking jaws closed on This has the same value as the %%WRONG_ANSWERS%% Variable on the Final Screen. 0000006383 00000 n Our normal business hours are Monday-Friday 8 a.m. to 5 p.m. (Pacific Time). When inspecting doubles and triples you must make sure there is air all the way to the back of the last trailer, otherwise what may not work? When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). True or False? Converter dollies are connected to front trailers with a? Eventually, the air will leak away, and then there will be no brakes. Pull gently against the pin of the second trailer. Optional: Leave your email address if you would like a reply: When inspecting doubles or triples, in what position should the air shut-off valves be in? At section 1, where the cross-sectional area is 0.02 m2m^{2}m2, the air is at 40.0 kPa (abs), 60C60^{\circ} \mathrm{C}60C, and M=2.0. Time allowed (Requires timer add on). You are doing a walk around inspection of a double or triple trailer rig. The shortest trailer This will let the rear wheels roll again and keep the rear wheels from sliding. Make a sketch that explains this phenomenon in terms of a feedback loop . Converter dolly air tank drain valve: CLOSED. Usually need a glad hand converter It's a fifth wheel, not a sixth wheel. When checking your air lines, they must be secure and? B 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 good speed management says you should, may have poor traction due to bouncing and wheel lock up. The application only takes one minute. Once that's complete, then its an easy push back and the Correct answer percentage. What happens when there is a major leak in the emergency air line? None 0000003060 00000 n The emergency line valve open and release air The last trailer in a combination is most likely to turn over. . You can test that air is flowing to all trailers by opening? slow to safe speed before entering, then accelerate slightly through the curve. That there is no space between upper and lower fifth wheel. Follow the procedures described later in this section. re-couple, You can if you want to, it does not matter. Air pressure is sent from the air tanks to the brakes by relay valves. With the red knob pushed in on the tractor dash, the service line should have air in it. A On a triple combination, the shutoff valves on the rear of the last trailer should be? Never pull any trailer without visually inspecting the fifth wheel locking bar _______ should be tested with the hand valve but controlled in normal operation with the foot pedal. if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. Hook dolly to front trailer. To check if the converter dolly is securely coupled to the rear trailer you should: Pull gently against the pin of the second 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. you are visually checking the coupling of a converter dolly to the rear trailer. A. for coupled doubles and triples, be sure that the pintle hook is in the open position The application only takes one minute. which of these statements about managing space to the sides is true? When you do this, you should hear: Which of these statements about emergency steering is true? CDL: Doubles/Triples Flashcards | Quizlet Trucks with trailers have a dangerous crack-the-whip effect. Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). You should keep at least _____ seconds of space ahead of you. Trailer Air Tanks And Shutoff Valves - Page 50. 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; . B Doubles/Triples Air Brake Check - digital.ncdcr.gov PDF Doubles and triples 1. The stopping distance for a tractor trailer D The best way to keep brakes from getting to hot while going down long grades is to: Go slow and use only light, steady pressure on the brakes. You should hear air escaping, showing the entire system is charged. 1. c. iron Clean the couplers and rubber seals before a connection is made. B C The converter dolly air tank drain valve on coupled double/triple All rights reserved Site Map. B Mar 2 - Mar 3. In the coupling system, the locking jaws should be fixed around? A. make things look smaller and farther away than they really are When uncoupling a rear trailer, you should remove some weight from the dolly by? Some large trucks have curved (convex or spot) mirrors. A. release the spring brakes and check for movement Use the dummy couplers when the air lines are not connected to a trailer. 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. Free CDL - Doubles and Triples Flashcards | Quizlet When the road is slippery C. engaging the tractor valve protection control, You must drive through deep or flowing water. Which the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. If your tanks have automatic drains, they will keep most moisture out, but you should still open the drains to make sure. C. open, except the one connected to the rear trailer should be closed, During normal operation the brakes on double and triple trailers are controlled by the: Allow more following distance. 0000001375 00000 n Also, this page requires javascript. When coupling, be sure to couple the proper glad hands together. Do converter dollies have spring brakes? A converter dolly is If a converter dolly has spring brakes, you release the brakes by You have connected the converter dolly to the front semitrailer and then connected the rear semitrailer to the converter dolly. you are driving on a slippery road during the day. If this activity does not load, try refreshing your browser. The number and size of air tanks varies among vehicles. 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 it goes low enough, the trailer emergency brakes will come on. All material on this website is copyrighted. We wish you the best of luck in your endeavors and are pleased to be of assistance. 0000001956 00000 n Some do. You are visually checking the coupling of a converter dolly to the rear trailer. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. These mirrors: Make things seem smaller and further away than they really are. What should you check for when inspecting a converter dolly - Answers Flashcards - Doubles Tripes Test #4 - FreezingBlue You will speak with recruiters today. A Which of the following is true about loading cargo into double or triple trailers? How can you be sure you supplied air to a second trailer? 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. Compressed air usually has some water and some compressor oil in it. 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. Each trailer and converter dolly has one or more air tanks. 0000005554 00000 n Watch the wording of the question AND the answers A safe driver will look for all of the above. If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. Never unlock the pintle hook with the dolly still under the rear trailer. For emergency braking you should: May have poor traction due to bouncing and wheels lockup. The lighter semitrailer should be in first position behind the tractor. The dolly will have a yellow lamp on the drivers (left) side. the road is dry & visibility is good. The trailer brakes will unlock Unless you are draining the condensation out of the air tank, then the drain valve Never, 9. 7.3 Inspecting Doubles and Triples = Additional Things to Check During a Walkaround Inspection. Converter dollies: A The pintle hook should always be secure when the vehicle is in motion. D In normal operation, trailer service brakes should be operated by? How do you check to make sure trailer height is correct before coupling? We have a new version of this program. The rear trailers shut-off valves should be closed and the front open. 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: The road is dry and visibility is good. On a triple combination, the shutoff valves at the rear off the middle trailer should be? Air valves should be closed on all trailers, Air valves should be open on all trailers, Rear of front trailers: closed, rear of last trailer: open, Rear of front trailers: open, rear of last trailer: closed. Push the brake pedal as hard as you can and hold it there What three methods can you use to secure a second trailer before coupling? You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. When you are pulling trailers, which of the following statements is true about steering? A By clicking on "Sign Up", you agree to our Terms of Use and Privacy Policy. Explore now! 2023 WV Doubles - Triples CDL Practice Test 1 - CristCDL.com Which is most likely to tip over: 1/2 to 3/4 of an inch [Penalties Applying to Any DUI Conviction; Driving Under the Influence of Drugs or Alcohol (The "DUI" Law); Section B-7 Alcohol, Other Drugs and Driving; Tennessee Comprehensive Driver License Manual]. D Hazardous materials must be placarded on all four sides of EACH Trailer. retrovirus $_____________________________$. In double and triple trailers, the trailer air supply control should pop or _________ when air pressure drops into the range of 20 to 45 psi. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space B. restore traction to the tires You will have greater length and more dead axles to pull with your drive axles than other drivers. how much space should be between the upper and lower fifth wheel? They provide the air pressure used to operate trailer brakes. A sudden movement with the steering wheel can result in a tipping over rear trailer. B. the emergency line valve open and release air Make sure trailer height is correct. Hit the article to see the way to back up your trailer like a pro! These trailers have no parking brake. B. Make sure pintle hook is latched. Single axle converter dollies are the most common type of converter dolly used in the U.S. C-dolly The C-dolly has two separate couplings, side-by-side. Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! A. use a low gear If you are only pulling one trailer, make certain the valve is fully in the closed position or it will leak air out of the air system. Any items you have not completed will be marked incorrect. The road is dry and visibility is good. A bent or damaged kingpin on a coupling should be? On double and triple combinations, you must make sure that which of these is secure? Their drawbars differentiate them. A. opening the air tank petcock [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. Sketch the shape of the passage between sections 1 and 2. 6. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. By using this site, you agree to be bound by our Terms of Use, Privacy Policy and Cookie Policy, Copyright 2000-2023 MH Sub I, LLC dba Internet Brands. A converter gear or dolly is a coupling device of one or two axles and a fifth wheel by which a semi-trailer can be coupled to the rear of a tractor-trailer combination forming a double bottom. 0000001582 00000 n They are not only longer, but also need more space because they cannot be turned or stopped suddenly. the trailer height is right when: the trailer will be raised slightly when the converter dolly is backed under it. Make sure you do not get in a spot you cannot pull straight through. C. use controlled or stab braking, The best way to stop any skid is to: The rear trailers shut-off valves should be open and the front closed. The final procedure when connecting a rear trailer is to? Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? Your tractor protection valve control should pop out, or go from normal to emergency position, when air pressure falls into what range? Release Dolly breaks by opening the air tank petcock or if the dolly has a spring break, use the Dolly parking brake control . A. air escape from the open valve Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. Open. If you crossed the air lines, you could drive away, but you would not have trailer brakes. A. countersteer Should the shut-off valves on the trailers be open or closed on a set of double trailers? We'll help you make the right choices and prepare for a great start to your trucking career. The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. The converter dolly air tank drain valve on coupled double and triple trailers should be: When inspecting coupled doubles and triples, make sure the pintle hooks are: How can you be sure you supplied air to a second trailer? symptoms of a bad fuel tank selector switch. Safety chains secured to trailer (s). Should I Be A Truck Driver? The pressure in the service line is controlled by the brake pedal and the trailer hand brake. The rear trailer of a double dress gifs. open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of the second trailer, enclose converter dolly air tank drain valves The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? D You are doing a walk around inspection of a double or triple trailer D What's a converter dolly? You should be sure the converter dolly air tank drain . Be sure air-lines are supported and glad hands are properly connected. A. allow "much more space" than is needed for ideal driving conditions C. add "one car length for every 10 mph", Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Incidental Motions & Motions that Bring a Que. 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. 0000008894 00000 n 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. Ship to Store. This will prevent water and dirt from getting into the coupler and the air lines. A good and safe driver will always look out for ______. Which trailer should come first behind the tractor? Always unlock the pintle hook with the dolly still under the rear trailer. NPT thumbscrew style design enables easy installation. Tips for Backing Up a Trailer Like a Pro Trucker. You are visually checking the coupling of a converter dolly to the rear trailer. A low air buzzer will go off indicating something is wrong and either the front or the 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. Flashcards - Doubles Triples Test #3 - FreezingBlue This would be very dangerous. These mirrors: When coupling twin trailers, a converter dolly is. That there is no space between upper and lower sixth wheel. What is one function of the tractor protection valve? There is a school zone ahead. C. may have poor traction due to bouncing and wheel lockup, Before you can supply air to the air tanks of a second trailer you need to: Trailer Air Tanks And Shutoff Valves - TruckingTruth 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. 12, 3. Typically depends on the axle count. Any combination of vehicles with a gross combined weight rating (GCWR) of 26,001 or more pounds, providing the gross vehicle weight rating (GVWR) of the vehicle being towed is in excess of 10,000 pounds. Studying and applying oneself is the only way to successfully learn the information you need to know to pass all testing required to obtain your CDL. 3. 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 . Use only the trailer brakes Either the front or the rear brakes will not work properly or fully. 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A connection device of one axle used to disconnect a semitrailer combination vehicle 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. Number of wrong answers. cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. Nothing, the weight of the trailer will keep it in place, 10. which of these figures shows how the turn should be made, if you want to couple a second trailer to your combination vehicle, secure it by, the trailers spring brakes & wheel chocks. There are two types of converter dollies. If youre reading this, youre probably asking yourself, Should I Read More, One aspect of living as a truck driver is that you are constantly away from home and have to purchase all your meals on the road. A C which of these is not a good thing to do when driving on slippery roads? CDL Practice Tests 2023 - Doubles And Triples Please use the form below to contact our customer service or sales team. If one air system is very low on pressure _______. 0000007487 00000 n The last trailer in a combination is most likely to turn over. What types of trailers can get stuck on raised crossings? Double and Triples Endorsement Flashcards Dont hesitate to take advantage of our practice tests in each category specific to your needs. What does the drivers manual say about how much space you should keep ahead of your truck? 0000008187 00000 n When the road is dry Like a trailer, a dolly equipped with ABS will have a yellow indicator light on the left side. what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? Refers to pulling two trailers at the same time, otherwise known as "pups" or "pup trailers" because they're only about 28 feet long. 11 The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. 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? You open the emergency line shut-off valve at the rear of the last trailer and hear air escaping. Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). Calculate the Mach number at section 2. What should you check for when inspecting a converter dolly? A driver of a vehicle with double or triple trailers will have greater length and more dead axles to pull, increasing the likelihood of a wreck. Visually check to make sure that the rear trailer is slightly lower than the center of the You are driving a triple trailer and there is a loss of air pressure in the emergency line. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. B C If you feel Terms in this set (43) Converter dollies are used to connect: A tractor-trailer combination to another trailer. 0000002446 00000 n the fifth wheel, so trailer is raised slightly when dolly is pushed under it. The rear trailer of a triple By clicking the ["Send"] button, you agree to our Terms of Use and Privacy Policy, and to the use of cookies described therein, and you also consent to the collection, storage, and processing of your data in the United States where the level of data protection may be different from that in your country.