The rear trailer of a double The driver will be required to complete this requirement in three eight hour shifts. Never, 9. A. open They provide the air pressure used to operate trailer brakes. Pintle hook latched. [Flashing Signals, Traffic Signals, Chapter 5 - Signals, Signs and Pavement Markings, North Carolina Driver's Handbook], One component of the DUI sentence in the state of Tennessee is twenty-four hours of litter pick-up wearing clothing that says "I am a drunk driver." Trailer Air Tanks And Shutoff Valves - Page 50. 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. 0000004689 00000 n Make sure trailer height is correct. 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested rear brakes will not work properly. If there is a trailer For emergency braking you should: Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). Visually check to make sure that the lead trailer is slightly higher than the center of 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. The dolly tow bar may fly away, possibly causing panic, and making it very difficult That there is some space between the upper and lower fifth wheel. The lighter trailer should be in the rear. We have a new version of this program. A Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. You must treat a flashing red signal as you would treat a STOP sign. 0000008894 00000 n When coupling twin trailers, a converter dolly is. On the first trailer in a set of doubles? When connecting two trailers the converter dolly is connected to the rear trailer first. You should be sure the converter dolly air tank . 0000006383 00000 n It is important to check the height of the trailer before connecting a converter dolly to a trailer. you are driving a set of doubles and a set of trailer wheels goes in a skid. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? Allow much more space than is needed for ideal driving condition. You have not finished your quiz. 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What is likely to happen? When uncoupling, you should never unlock the _______ with the dolly still under the rear trailer. When the road is slippery Push the brake pedal as hard as you can and hold it there A King pin. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. The rear trailers shut-off valves should be closed and the front open. If spare tire is carried on converter gear (dolly), make sure it's secured. 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. Use controlled or stab braking Open. Which of these statements about the handling of doubles and triples is true? 0000005345 00000 n They are filled by the emergency (supply) line from the tractor. What should you check for when inspecting the converter dolly? With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. Please wait while the activity loads. You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. Contributor: Luke Nold (Experienced truck driver for 5+ years and published writer for Fleet Magazine). 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? Which of these is the correct answer? 0000008166 00000 n 0000010783 00000 n D The rear trailers shut-off valves should be open and the front closed. The couplers have a rubber seal that prevents air from escaping. 0000003977 00000 n the fifth wheel, so trailer is raised slightly when dolly is pushed under it. Converter dolly air tank drain valve: CLOSED. 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. Becoming A Truck Driver is a dream we've all pondered at some point in our lives. 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. 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]. Correct answer percentage. Make sure you do not get in a spot you cannot pull straight through. B A green traffic light allows the driver to go. You should look into the back of the fifth wheel on a dolly to see if it is locked onto the kingpin, A safe speed on a curve for a straight truck or a single trailer combination vehicle may be too fast for double or triple trailers. To prevent trailers from rolling over, you must steer gently and go slowly around corners, on ramps, off ramps and curves. Any vehicle required by federal regulations to be placarded while transporting hazardous materials. When checking the fifth wheel, you should make sure that it has enough? C. closed; unlatched, Which of these will result in the best control on a curve? B. driven with care to avoid losing control, Make sure the spare tire is secured, if it has one, Make sure the converter dolly air tank drain valve is closed, Make sure safety chains are secured to the trailers, All of the above. 0000006195 00000 n good speed management says you should, may have poor traction due to bouncing and wheel lock up. Locking jaws closed on which of these is not a good thing to do when driving on slippery roads? 0000005733 00000 n 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. How do you check to make sure trailer height is correct before coupling? Calculate the voltage gain of each. When you do this, you should hear: C How To Use Cruise Control Effectively As A Truck Driver. B. you can almost always stop more quickly than you can turn For emergency braking you should: Then, the air loss from the leak will lower the air tank pressure quickly. You are driving with double trailers and must use your brakes to avoid a crash. 0000002446 00000 n A good and safe driver will always look out for ______. All ABS equipped units None of the above, 2. Once that's complete, then its an easy push back and the 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. Any trailer with a reduced ground clearance securely fastened. You may not notice a major leak in the service line until you try to put the brakes on. Open, free A. the total stopping distance of a truck is the distance it takes to stop once the brakes are put on at any speed The last trailer in a combination is most likely to turn over. When does the Driver's manual say you should disable the steering axle brake? 9 Air escape from the open valve You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. Our normal business hours are Monday-Friday 8 a.m. to 5 p.m. (Pacific Time). You are visually checking the coupling of a converter dolly to the rear trailer. The lightest trailer If the converter dolly is close to your semitrailer, you should wheel it into position? B. releasing the pintle hook 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. The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples. Stop the vehicle by gearing down and sparingly What do you check when making a visual check of coupling? You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. 0000008915 00000 n C. closed, You can release the dolly brakes by: A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? 0000006836 00000 n Why should you use chocks when parking a trailer without spring brakes? The last trailer in a combination is most likely to turn over. 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. You MUST have air all the way to the back for all the brakes to work. C 10 Converter dollies are connected to front trailers with a? and possible answers include: open, free or closed, latched or closed, free or open, latched from TruckersDouble & Triple Trailer (CDL) Endorsement. you are visually checking the coupling of a converter dolly to the rear trailer. Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? B If your tanks have automatic drains, they will keep most moisture out, but you should still open the drains to make sure. Email Updates When New Articles Are Posted. Safety fail-safe features of a tractor-trailer converter dolly. True! You will speak with recruiters today. 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. Only trailers designed to be pulled with another trailer behind it will have a shut off valve. It is very important to keep the air supply clean. On the middle trailer of a set of triples? Wait for air pressure to reach normal, then push in the red trailer air supply knob. A. hand valve D 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 . What is a converter dolly? Which of these is most likely too occur? When you go to the rear of the last trailer, what should you do to complete this check? 12, 3. What is one function of the tractor protection valve? Each trailer and converter dolly has one or more air tanks. Before coupling a trailer, you should make sure it is at the right height using? All of the above, 6. On a triple combination, the shutoff valves at the rear off the middle trailer should be? B. for doubles and triples, the fifth wheel should be all the way towards the tractor If the dolly is a two axle unit then 1 How do you check to make sure trailer height is correct before coupling? A 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? 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. Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. safe speed would be 40 MPH. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. 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. To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? The application only takes one minute. We are here to help. There is more chance for skids and loss of traction. 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 the following statements about off tracking is true? A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. then there is a problem with the ABS system. Why should you not use the trailer hand valve while driving? Which of these are the correct positions for shut-off valves in doubles and triples? When checking your air lines, they must be secure and? At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. C. the service brakes slowly move to the fully applied position, Some large trucks have converted or "spot" mirrors. A. release the spring brakes and check for movement Secure converter gear support in raised position. This has the same value as the %%TIME_USED%% Variable on the Final Screen. 0000010306 00000 n can and will get stuck on a raised railroad crossing. The road is dry and visibility is good. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. which of these statements about managing space to the sides is true? weather passes. Go to Section 4: Other Topics This question is in Section 4: Other Topics of our CDL Test Guide. Make sure the converter dolly air tank drain valve is closed. They are filled by the emergency (supply) line from the tractor. The pintle hook? A dolly should be pulled out from a rear trailer using? 0000010705 00000 n Doubles and triples must be driven very smoothly to avoid rollover or jackknife. C and the converter dolly air tank drain valve should be _____. A. closed; latched when driving a truck with more than one trailer, which trailer should be first behind the truck? you want to hook your combination to a second trailer that has no spring brakes. When coupling, be sure to couple the proper glad hands together. Flammable materials in the front trailer then it must have the placards on that trailer. There is no obligation whatsoever. True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. This would be very dangerous. If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen? Pull gently against them in a low gear to make sure the brakes work. You are driving a 100 foot twin trailer combination at 50 mph. [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]. How can you be sure you supplied air to a second trailer? The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. re-couple, You can if you want to, it does not matter. The rear trailer of a triple c. iron When does the "driver's manual" advise disconnecting the steering axle brakes to help Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. On a triple combination, the shutoff valves on the rear of the last trailer should be? Which of these is most likely to occur? 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