you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. A. make things look smaller and farther away than they really are Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested 2. Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? 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. The Home Depot Logo the fifth wheel, so trailer is raised slightly when dolly is pushed under it. What is a converter dolly? | Samsara The road is dry and visibility is good. Provides a snug fit to eliminate unwanted seepage of air or water. The DMV doubles triples practice test will examine your knowledge of pulling double/triple trailers, coupling and uncoupling, inspecting doubles and triples, and checking air brakes. Open Which of these is the correct answer? The total number of questions. The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. When the road is dry Usually need a glad hand converter Flashcards - Doubles Tripes Test #4 - FreezingBlue when does the drivers manual say you should disable the steering axle brakes? 0000003977 00000 n 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. You are driving a 100 ft twin trailer combination at 50 mph. To prevent trailers from rolling over, you must steer gently and go slowly around corners, on ramps, off ramps and curves. You can test that air is flowing to all trailers by opening? You should NOT: You are driving a set of doubles and a set of trailer wheels goes into a skid. Which of these is most likely to occur? B. closed Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. weather passes. Secure converter gear support in raised position. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. C. the service brakes slowly move to the fully applied position, Some large trucks have converted or "spot" mirrors. The DMV doubles triples practice test will examine your knowledge of pulling double/triple trailers, coupling and uncoupling, inspecting doubles and triples, and checking air brakes. Some do. 2022 DE Doubles - Triples CDL Quick Review 1 - CristCDL.com A You are driving a 100-feet truck with double trailers at 50 mph. Ship to Store. 7. 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? B 0000005554 00000 n A bent or damaged kingpin on a coupling should be? 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? 2) the second test is to go out to the trailer to ensure that the parking brakes have indeed applied. High Road 2.0! B You should keep at least ____ seconds of space ahead of you. There is no obligation whatsoever. some large trucks have curved (convex or spot) mirrors. When the road is slippery Doubles and triples are more likely to overturn than other combination vehicles because of the whip cracking effect. A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. None of the above, 4. When only pulling one trailer, be sure the shut-off valves are all in the fully closed position. A truckers workspace is a small moving office Read More. locked . 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. Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. C. 3, You are doing a walk around inspection of a double or triple trailer rig. Safety chains should be secured to trailer(s). 0000002446 00000 n 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? 27. Your vehicle is so long that you must swing wide to make the turn. a sudden movement with the steering wheel can result in a tipped over rear trailer, you wish to turn right from one two-lane, two-way street to another. 0000001107 00000 n Doubles/Triples Air Brake Check - digital.ncdcr.gov You need to brake in order to regain control. What three methods can you use to secure a second trailer before coupling? open, closed, closed: Term. If this lamp is illuminated and does not go out, D. Make sure the spare tire is secured, if it has one. Chock the tires, park on level ground and charge the trailer air tank if it does The converter dolly is an auxiliary axle with a coupling device. You are doing a walkaround inspection of a double or triple trailer rig. [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 rear trailer. A) closed . with the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. Which of these is NOT a good thing to do when driving on slippery roads? Stop the vehicle by gearing down and sparingly Which of these statements about managing space to the sides is true? The rear trailers shut-off valves should be open and the front closed. A dolly has lights, air tanks, air relays, air lines, air brakes, ABS, electrical connections, etc. Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? It is important to check the height of the trailer before connecting a converter dolly to a trailer. How do you know if your converter dolly is equipped with antilock brakes? Amazon.com: Air Tank Drain Valve Your tractor protection valve control should pop out, or go from normal to emergency position, when air pressure falls into what range? 0000003998 00000 n retrovirus $_____________________________$. 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. Never pull any trailer without visually inspecting the fifth wheel locking bar You will speak with recruiters today. Make sure trailer height is correct. In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. If the converter dolly is close to your semitrailer, you should wheel it into position? 2023 WV Doubles - Triples CDL Practice Test 1 - CristCDL.com 2 You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. There are more critical parts to check when you have two or three trailers. What's a converter dolly? Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. 0000007032 00000 n Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. Our normal business hours are Monday-Friday 8 a.m. to 5 p.m. (Pacific Time). Park the rear trailer against another trailer, chock the tires and lock the trailer The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. Pull gently against the pin of the second trailer. What is a converter dolly? Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. What should you check for when inspecting a converter dolly - Answers They are not only longer, but also need more space because they cannot be turned or stopped suddenly. Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver. The Verge logo. 0000006015 00000 n Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. A. you can steer more quickly and safely if you hold the wheel with one hand Always test the trailer brakes before driving with the hand valve or by pulling the air supply (tractor protection valve) control. B. the emergency line valve open and release air 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 In order to supply air to the air tanks of a second trailer, you must ______ shut-off valves at the rear of the first trailer and ________ the shut-off valves at the rear of the second trailer. Any trailer with a reduced ground clearance C These mirrors: Make things seem smaller and further away than they really are. Open the emergency line shut-off valve at the rear of the last trailer. All of the above, 6. It's a fifth wheel, not a sixth wheel. Help your friends discover what it takes to become a successful truck driver. Lock pintle hook. What should you check for when inspecting the converter dolly and the pintle hook? Also available in App Store & Google Play. Any trailer, 7. Select the answer that correctly completes each statement. C. posted speed limits on curves are safe for all trucks, Empty trucks: We've all wondered if the adventure and challenges of life on the open road would suit us better than the ordinary day to day lives we've always known. Be certain you are clear at the sides before changing lanes. On double and triple combinations, you must make sure that which of these is secure? For emergency braking you should: What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly? The application only takes one minute. When coupling twin trailers, a converter dolly is. A. allow "much more space" than is needed for ideal driving conditions All trademarks are property of their respective owners. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. behind the shut-off valve then they need to remain open. To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and A. for coupled doubles and triples, be sure that the pintle hook is in the open position For all brakes to work on a triple combination, you must have air supply? To do this without wheels chocks you should: Supply air to the trailer air system with the tractor and then disconnect the emergency line. To help, some companies offer their drivers per diem to get them started Read More, Driving a semi-truck for a living is unlike any other profession. Use only the trailer brakes Pintle hook latched. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. ADVERTISEMENT ADVERTISEMENT "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. Air pressure is sent from the air tanks to the brakes by relay valves. When uncoupling a rear trailer, you should remove some weight from the dolly by? The pintle hook should always be secure when the vehicle is in motion. When uncoupling the converter dolly Why should you never unhook the Doubles and triples must be driven very smoothly to avoid rollover or jacknife. 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. 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. How can you be sure you supplied air to a second trailer? unsafe slow down even further, or better yet, find a safe haven and park until the The road is dry, and visibility is good. We'll help you make the right choices and prepare for a great start to your trucking career. 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. D 12, 3. 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. Calculate the voltage gain of each. A first check for battery voltage to the valve by probing the wires of the electrical connector with a volt-meter it should be about 10.5 volts if not it's probably bad.next remove the valve. C Check them all. In order to receive your Doubles and Triples endorsement, it is required that you pass the state's official CDL written Knowledge exam. 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. 0000007508 00000 n When checking the coupling system, make sure that the locking jaws are around the shank of the. Slow to the safe speed before entering, then accelerate slightly through the curve. The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. which of these statements about the handling of doubles and triples is true ? 1. If you leave this page, your progress will be lost. symptoms of a bad fuel tank selector switch. B. slightly raised Make sure you do not get in a spot you cannot pull straight through. you are driving a set of doubles and a set of trailer wheels goes in a skid. Remember however, that is just a suggestion. If there is Try our free CDL Doubles and Triples Test Question and Answers Quiz online. This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. Time allowed (Requires timer add on). A green traffic light allows the driver to go. Go to Section 4: Other Topics This question is in Section 4: Other Topics of our CDL Test Guide. Take special care when pulling two and three trailers. Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? A Nothing will happen, but an in-cab warning indicator will let you know about the problem, It will cause the tractor protection valve to close and the trailer emergency brakes to come on, It will cause the tractor protection valve to open and the trailer emergency brakes to come on, When you try to put the service brakes on, air will quickly leak and will lower the air tank pressure, possibly activating the trailer emergency brakes, The emergency brakes will come on automatically as soon as a major leak occurs, Nothing, but braking power will be reduced, Air pressure will quickly leak away, even if you are not using the service brakes, Using a combination of the emergency air line and the service air line, Supply air will be sent to the service line instead of going to charge the trailer air tanks which means the trailer spring brakes will not release, Newer vehicles automatically detect if the lines are crossed and will auto-correct itself, Air will continue filling the air holding tanks until the tanks rupture from excessive pressure, Supply air will cause all brakes to release and the truck will roll freely without any braking ability, Trailers typically do not have their own air tanks, Designed to turn off the truck engine when a brake failure occurs, Used in the service and supply air lines at the back of trailers used to tow other trailers, Placed at each trailer spring brake and are designed to engage the emergency brakes when air pressure becomes too high, The yellow and red air control knobs located in the cab of a truck, Used to secure the trailer kingpin to the tractor 5th wheel, Caps which cover the valve stems on tires, A name for the yellow and red air valves in the cab of a truck, Coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer, Email Updates When New Articles Are Posted. CDL: Doubles/Triples Flashcards | Quizlet True! Air escape from the open valve King pin. When driving doubles or triples how should they be driven to avoid rollover or jackknifing: There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. Which of the following will occur? Allow more following distance. should remain in the closed position. Converter dolly air tank drain valve: CLOSED. C 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. C. back up slightly and make a visual check of the coupling, You are driving with double trailers and must use your brakes to avoid a crash. Trucks with trailers have a dangerous crack-the-whip effect. 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. The dolly tow bar may flip up causing bodily injury and making it very difficult to Doubles and triples are more likely to turn over than other combination vehicles because of what effect?
the converter dolly air tank drain valve should be