Open the emergency line shut-off valve at the rear of the last trailer. In order to receive your Doubles and Triples endorsement, it is required that you pass the states official CDL written Knowledge exam. B You are doing a walk around inspection of a double or triple trailer rig. Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. What do you check when making a visual check of coupling? 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. If you're only pulling one trailer, the shut off valves should always be closed or else the air will simply escape out the back of the trailer. Pintle-eye of dolly in place in pintle hook of trailer (s). Make sure pintle hook is latched. allow "much more space than is needed for ideal driving conditions". Question 4. You shouldn't stop braking. 0000001582 00000 n A. for coupled doubles and triples, be sure that the pintle hook is in the open position When checking your air lines, they must be secure and? 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. the rig will continue moving in a straight line no matter how much the steering wheel is turned. To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and Opening the shut off valves on the rear most trailer will ensure the lines are flowing When entering a roundabout, a driver must yield the right-of-way to drivers already in the roundabout and obey all traffic signs. The heaviest trailer 1/32 to 3/32 of an inch. At section 2 downstream, the speed is 519 m/s. B. johnson bar 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. Contributor: Luke Nold (Experienced truck driver for 5+ years and published writer for Fleet Magazine). and possible answers include: open, free or closed, latched or closed, free or open, latched from TruckersDouble & Triple Trailer (CDL) Endorsement. Like a trailer, a dolly equipped with ABS will have a yellow indicator light on the left side. 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 Some do. The emergency line valve open and release air Should the converter dolly air-tank drain valve be open or closed on a double trailer combination? 0000001354 00000 n This will let the rear wheels roll again and keep the rear wheels from sliding. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. You can also reach us at (888) 830-2326. Do converter dollies have spring brakes? Eventually, the air will leak away, and then there will be no brakes. 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. Safety chains should be secured to trailer(s). Mar 2 - Mar 3. Sketch the shape of the passage between sections 1 and 2. Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. It's a fifth wheel, not a sixth wheel. B Speed for other vehicles is often too fast for a multi-combination unit! How should you test the coupling? These dollies will have a yellow lamp on the left side of the dolly Questions You Should Know For Doubles And Triples 1. D 5. Never unlock the pintle hook with the dolly still under the rear trailer. B. use only the trailer brakes Ship to Store. 0000005664 00000 n Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. Make sure trailer height is correct. 0000008894 00000 n This has the same value as the %%TIME_USED%% Variable on the Final Screen. Secure converter gear support in raised position. Converter dollies have spring brakes. Which of the following statements about off tracking is true? Good speed management says you should: You must drive through deep or flowing water. A-dolly. Stop the vehicle by gearing down and sparingly Visually check to make sure that the rear trailer is slightly lower than the center of the Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. B Because of this, which of the following vehicle parts is most likely to tip over? 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. If not, there is a problem. On a triple combination, the shutoff valves on the rear of the last trailer should be? All trademarks are property of their respective owners. Converter dollies are connected to front trailers with a? Locking jaws closed on Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. 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? Safety should never take second place, so know your stuff! 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. What three methods can you use to secure a second trailer before coupling? C. closed, You can release the dolly brakes by: The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. A When inspecting a converter dolly What should you check for? You are driving a 100 foot twin trailer combination at 50 mph. You can test that air is flowing to all trailers by opening? Which of these is most likely to occur? If you crossed the air lines, you could drive away, but you would not have trailer brakes. A sudden movement with the steering wheel can result in a tipping over rear 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. Make sure you can hear air escaping with the valve closed. How can you test that air flows to all trailers? When you do this, you should hear: B unsafe slow down even further, or better yet, find a safe haven and park until the B. you should avoid traveling next to others whenever possible A. opening the air tank petcock The Verge logo. 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. Which of these is NOT a good thing to do when driving on slippery roads? A. you can steer more quickly and safely if you hold the wheel with one hand In this order, the shutoff valves at the rear of front trailers, the rear of the last trailer and the converter dolly air tank drain valve should be? Air Storage and Drain Tanks: Air storage tanks are used to hold compressed air. 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 should keep atleast __seconds of space ahead of you. 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. This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. You need to brake in order to regain control. Make a sketch that explains this phenomenon in terms of a feedback loop . To help avoid mistakes, colors are sometimes used. These dollies will have a yellow lamp on the left side of the dolly. True! Each trailer and converter dolly has one or more air tanks. When testing trailer service brakes, you should use? . Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? C. posted speed limits on curves are safe for all trucks, Empty trucks: When checking the coupling system, make sure that the locking jaws are around the shank of the. The dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. Wait for air pressure to reach normal, then push in the red trailer air supply knob. When driving doubles or triples how should they be driven to avoid rollover or jackknifing: There is a school zone ahead. Also, this page requires javascript. Seriously! When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. Use controlled or stab braking C. fully raised, Which of these statements about speed management and braking is true? This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. 0000006195 00000 n re-couple, You can if you want to, it does not matter. C You should be sure the converter dolly air tank . 1/2 to 3/4 of an inch D. Make sure the spare tire is secured, if it has one. While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. Open the emergency line shut-off valve at the rear of the last trailer. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. You may be timed. For emergency braking you should: A Push the brake pedal as hard as you can and hold it there B 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? However, converter dollies and trailers built before 1975 are not required to have spring brakes. On the middle trailer of a set of triples? B Take special care when pulling two and three trailers. 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. The converter dolly air tank drain valve on coupled double/triple trailers should be: Closed. 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. Doubles and triples must be driven very smoothly to avoid rollover or jackknife. A 7. True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. Blue is used for the service lines, and red for the emergency (supply) lines. Have little braking power because they are small You should NOT: You are driving a set of doubles and a set of trailer wheels goes into a skid. Chock the tires, park on level ground and charge the trailer air tank if it does When pulling a single trailer with a Shut-Off Valve, the valves must be in the: Trailers built before what year may not be equipped with trailer spring brakes? 2003-2023 Chegg Inc. All rights reserved. Be certain you are clear at the sides before changing lanes. These trailers have no parking brake. When coupling twin trailers, a converter dolly is. What's a converter dolly? 5. We wish you the best of luck in your endeavors and are pleased to be of assistance. Stay up to date on truck driving industry news. 0000006015 00000 n Sometimes, metal tags are attached to the lines with the words service and emergency stamped on them. Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? Doubles/Triples Air Brake Check - digital.ncdcr.gov You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. The trailer is at the correct height when. paramount to safe driving. inspection of all equipment. which of these statements about managing space to the sides is true? This would be very dangerous. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space The rear trailers shut off valves should be closed and the front open to allow air to the DOUBLE/TRIPLE CDL Flashcards | Chegg.com A. use a low gear 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? Use the engine brake or speed retarder. What happens when there is a major leak in the emergency air line? What three methods can you use to secure a second trailer before coupling? You should NOT: [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. We'll help you make the right choices and prepare for a great start to your trucking career. Explore now! Take special care when pulling two and three trailers. CDL Practice Tests 2023 - Doubles And Triples Calculate the Mach number at section 2. Always test the trailer brakes before driving with the hand valve or by pulling the air supply (tractor protection valve) control. 10 These valves permit closing the air lines off when another trailer is not being towed. You should reduce your speed by about _____ on a wet road. How do you check to make sure trailer height is correct before coupling? Go to the rear of the rig. Your tractor protection valve control should pop out, or go from normal to emergency position, when air pressure falls into what range? Dobles - Triples Pruebas de prctica 3 - NJ 2023 - CristCDL.com What is a converter dolly? In the coupling system, the locking jaws should be fixed around? This has the same value as the %%WRONG_ANSWERS%% Variable on the Final Screen. What is likely to happen? Which f these will result in the best control on curves? behind the shut-off valve then they need to remain open. When connecting the glad hands, press the two seals together with the couplers at a 90-degree angle to each other. Leave a Reply Cancel reply - Free CDL Practice Tests 2022 B The heavier trailer should be in the rear. When you're trying to correct a drive-wheel braking skid why should you stop braking? How do you check to make sure the trailer height is correct before coupling? You should check the height of the trailer before connecting a converter dolly to a second or third trailer. D Pull gently against the pin of the second trailer. A. air escape from the open valve should remain in the closed position. Light cords firmly in sockets on trailer. Hazardous materials must be placarded on all four sides of EACH Trailer. Doubles and triples take up more space than other commercial vehicles. What is the most common foundation brake found on heavy vehicles? In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. C. closed; unlatched, Which of these will result in the best control on a curve? You can find it here: High Road 2.0. True or False? The couplers have a rubber seal that prevents air from escaping. 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; . the fifth wheel, so trailer is raised slightly when dolly is pushed under it. None of the above, 2. you are doing a walkaround inspection of a double or triple trailer rig. Converter dolly air tank drain valve: CLOSED. Flammable materials in the front trailer then it must have the placards on that trailer. When driving a truck with more than one trailer, which trailer should be first behind the truck? When driving with more than one trailer, which trailer should be the first one behind the tractor? front of the second trailer. You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. For emergency braking you should: Before you can supply air to the air tanks of a second trailer you need to: Open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of second trailer. 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. C. close the shut-off valves at the rear of the first trailer and open the shut-off valves at the rear of the second trailer, To check that the converter dolly is securely coupled to the rear trailer, you should: You need to stop braking because it's necessary for you to speed up, When you are in a drive-wheel braking skid, the first thing to do is STOP BRAKING! A. release the spring brakes and check for movement If there is A. closed; latched When you do this, you should hear: you are driving with double trailer and must use your brakes to avoid a crash. You are driving a triple trailer and there is a loss of air pressure in the emergency line. That there is no space between upper and lower fifth wheel. King pin. When does the "driver's manual" advise disconnecting the steering axle brakes to help The pressure in the service line tells how much pressure the relay valves should send to the trailer brakes. Never, 9. Any time you have to You should be sure the converter dolly air tank drain . You should keep at least _____ seconds of space ahead of you: You are driving with double trailers and must use your brakes to avoid a crash. Lock pintle hook. Why should you check for when inspecting the converter dolly? The total number of questions. A. require shorter stopping distances than full ones 0000008187 00000 n 0000003977 00000 n C That there is no space between upper and lower sixth wheel. If the spring brakes do not release when you push the trailer air supply control, check the air line connections. 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]. D Which of these is most likely too occur? Each trailer and converter dolly has one or more air tanks. Doubles and triples are more likely to overturn than other combination vehicles because of the whip cracking effect. C. use controlled or stab braking, The best way to stop any skid is to: Usually need a glad hand converter Open, free 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. The Doubles and Triples written CDL Exam is required for your doubles and triples endorsement. Which of these statements about quick steering movements and doubles/triples is true? It depends on the load 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. The emergency brakes come on whenever air pressure in the emergency line is lost. You will speak with recruiters today. the trailer height is right when: the trailer will be raised slightly when the converter dolly is backed under it. 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 If it goes low enough, the trailer emergency brakes will come on. . Amazon.com: Air Tank Drain Valve The road is dry and visibility is good. You will have greater length and more dead axles to pull with your drive axles than other drivers. 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. Locking jaws closed on D You should keep at least ____ seconds of space ahead of you. 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. After 15 years on the road I wanted to help people understand the trucking industry and everything that came with the career and lifestyle of an over the road trucker. You have not finished your quiz. A truckers workspace is a small moving office Read More. Release Dolly breaks by opening the air tank petcock or if the dolly has a spring break, use the Dolly parking brake control . you want to hook your combination to a second trailer that has no spring brakes. Air pressure is sent from the air tanks to the brakes by relay valves. will have a lamp on the drivers side. When you're finished, check your score and results. How should the converter dolly air tank drain valve on coupled double Time used (Requires timer add on). 0000003998 00000 n The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. The converter dolly air tank drain valve on coupled double/triple Always unlock the pintle hook with the dolly still under the rear trailer. Which the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? A safe speed would be 40 MPH. trailer << /Size 59 /Info 20 0 R /Root 22 0 R /Prev 29211 /ID[] >> startxref 0 %%EOF 22 0 obj << /Type /Catalog /Pages 19 0 R >> endobj 57 0 obj << /S 66 /Filter /FlateDecode /Length 58 0 R >> stream Close the emergency line shut-off valve at the rear of the trailer. The last trailer in a combination is most likely to turn over. Ideal for replacing a worn, leaky drain valve on a compressor. Hit the article to see the way to back up your trailer like a pro! Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. Tractor-trailers are considered combination vehicles. Air flows steadily and isentropically through a passage. with the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. weather passes. Each tank has a drain valve on it, and you should drain each tank every day. the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. A dolly is like a very short trailer, with a ring hitch on the front and a fifth wheel on top. When you do this, you should hear: Ais escape from the open valve. 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. can and will get stuck on a raised railroad crossing. The tanks will hold enough air to allow the brakes to be used several times even if the compressor stops working. Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. 0000008915 00000 n To do this without wheel chocks you should: When uncoupling the rear semitrailer, you should lower the converter dolly landing gear: When driving a double or triple, you need more space because they: Which of these statements about emergency steering is true? A. completely open The word part ferrit- means: None of the above, 5. you are driving at night and you must dim your headlights for traffic. B. are the easiest to stop since there is no shifting cargo Go to the rear of second trailer and open the emergency line shut-of valve. What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly? Each trailer and converter dolly has one or more air tanks. What three methods can you use to secure a second trailer before coupling? When connecting a converter dolly to a rear trailer, the trailer height must be adjusted so that it is? What is one function of the tractor protection valve? When does the Driver's manual say you should disable the steering axle brake? Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. fifth wheel, so trailer is raised slightly when dolly is pushed under it. A On the first trailer in a set of doubles? Please visit using a browser with javascript enabled. A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. 0000001107 00000 n ADVERTISEMENT ADVERTISEMENT The service brakes slowly move to the fully applied position 2) the second test is to go out to the trailer to ensure that the parking brakes have indeed applied. Which of the following must be connected when coupling tractor to trailer or trailer to trailer? Inspecting Doubles And Triples | High Road Online CDL Training On a triple combination, the shutoff valves at the rear off the middle trailer should be? What is a converter dolly? some large trucks have curved (convex or spot) mirrors. That split second that you release the brakes will allow them to match the vehicles road To check air flows to all trailers, you should let air pressure reach normal then? B. open; latched Once you are finished, click the button below. A connection device of one axle used to disconnect a semitrailer combination vehicle What should you check for when inspecting a converter dolly? When uncoupling a rear trailer, your rig should be parked in a straight line on? 3. The topics with which you will want to be expertly familiar are: There isnt as much information to be studied in the classroom or in the CDL manual regarding doubles and triples, so in-lot and on-the-road practice will help you pass this test. 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: To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and?