You are driving with double trailers and must use your brakes to avoid a crash. Locking jaws closed on C A. use light, steady pressure on the brake pedal weather passes. C 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. When driving a double or triple trailer, greater care must be given to. _______ should be tested with the hand valve but controlled in normal operation with the foot pedal. When the road is slippery B. pull gently against the pin of the second semitrailer True! 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. 0000007032 00000 n 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: Becoming A Truck Driver is a dream we've all pondered at some point in our lives. door. C your vehicle is so long that you must swing wide to make a turn. A You are driving a tractor with multiple trailers. 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? Use controlled or stab braking In normal operation, trailer service brakes should be operated by? The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. Flashcards - Doubles Tripes Test #4 - FreezingBlue Trucks with trailers have a dangerous crack-the-whip effect. re-couple, You can if you want to, it does not matter. Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. Doubles and triples are more likely to turn over than other combination vehicles because of the "crack-the-whip" effect. Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? Which the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. More driving knowledge, questions and answers, online practice tests for obtaining a drivers . We are here to help. rear trailer. Calculate the net energy change in kilojoules per mole that takes place on formation of MgF2_22(s) from the elements: Heat of sublimation for Mg(s) = 147.7 kJ/mol Eea_{ea}ea for F(g) = -328 kJ>mol, Bond dissociation energy for F2_22(g) = 158 kJ>mol Ei1_{i1}i1 for Mg(g) = 737.7 kJ>mol, Electrostatic interactions in MgF2_22(s) = -2957 kJ/mol Ei2_{i2}i2 for Mg(g) = 1450.7 kJ/mol. A. make things look smaller and farther away than they really are Hit the article below to see specific information about AOBRDs! what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? A thorough pre-trip inspection should catch any major service line leaks before you begin your trip. a. blood C 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. 0000005554 00000 n 0000001107 00000 n You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. you are doing a walkaround inspection of a double or triple trailer rig. A. use a low gear A converter dolly is still under the second trailer when you unlock the pintle hook. Delivering to. B. allow one vehicle length for every 10,000 lbs of gross vehicle weight fumoto drain valve. 0000008915 00000 n View the price and details of this FINSBURY PUMP SYSTEMS 400L (SINGLE STAGE) 5.5HP HONDA GX PETROL ENGINE (18M HOSE) FIRE WATER TANK | Mobile fire units. 0000005664 00000 n 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. A 360 degree area of awareness is then there is a problem with the ABS system. All trademarks are property of their respective owners. You are driving a 100-feet truck with double trailers at 50 mph. 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. A 1/2 to 3/4 of an inch The converter dolly air tank drain valve on coupled double/triple trailers should be: Closed. When you're trying to correct a drive-wheel braking skid why should you stop braking? You wish to turn right from one two-lane, two-way street to another. Make sure you can hear air escaping with the valve closed. Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. What value of channel width must the design use? Pull gently against them in a low gear to make sure the brakes work. When coupling, be sure to couple the proper glad hands together. If there is The heavier trailer should be in the rear. This has the same value as the %%TOTAL%% Variable on the Final Screen. 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. 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. 2. How do you check to make sure the trailer height is correct before coupling? C When checking the coupling system, make sure that the locking jaws are around the shank of the. D This would be very dangerous. If you feel Doubles and triples must be driven very smoothly to avoid rollover or jackknife. mTouch Quiz will automatically populate the fields below. Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). You should keep at least ____ seconds of space ahead of you. Doubles/Triples Endorsement Flashcards | Quizlet not have spring brakes. If your tanks have automatic drains, they will keep most moisture out, but you should still open the drains to make sure. If one air system is very low on pressure _______. To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? The converter dolly air tank drain valve on coupled double/triple The driver will be required to complete this requirement in three eight hour shifts. When driving doubles or triples how should they be driven to avoid rollover or jackknifing: A sudden movement with the steering wheel can result in a tipping over rear trailer. B 0000001375 00000 n Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver. For emergency braking you should: which of these statements about emergency steering is true? Converter dollies: B. slow to a safe speed before entering the curve, then accelerate slightly through it Which of these is most likely too occur? Any trailer with a reduced ground clearance B. keep other traffic out of your side space Once you are finished, click the button below. View the full article to see how to set cruise control correctly! You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. 0000008166 00000 n how can you be sure you supplied air to a second trailer? 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. The shut off valves, when in the open position, allows air to flow out to another trailer. 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. and ensuring it is secure. D A. require shorter stopping distances than full ones Once you have coupled your rear trailer, you should test the coupling by? Open the emergency line shut-off valve at the rear of the last trailer. C. use a light touch on the accelerator and brake pedals, For coupled double and triple trailers, all of the converter dolly shut-off valves should be: The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. 0000009577 00000 n Leave the emergency line shut-off valve closed and open the service line valve. Also available in App Store & Google Play. When the road is dry Before coupling a trailer, you should make sure it is at the right height using? You shouldn't stop braking. A. Those that do not have spring brakes have emergency brakes that work from the air stored in the trailer air tank. 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]. What is a converter dolly? D. Make sure the spare tire is secured, if it has one. What three methods can you use to secure a second trailer before coupling? However, converter dollies and trailers built before 1975 are not required to have spring brakes. The rear trailers shut off valves should be closed and the front open to allow air to the 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. Question 3 Explanation: All of the above. 5. A dolly is like a very short trailer, with a ring hitch on the front and a fifth wheel on top. recouple. When entering a roundabout, a driver must yield the right-of-way to drivers already in the roundabout and obey all traffic signs. doubles/triples flip flop over from quick steering movements more easily than many other vehicles. This is CDL Doubles and Triples Test 3in our original Classic Mode. On double and triple combinations, you must make sure that which of these is secure? All material on this website is copyrighted. 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. 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. 4. Some areas of concern are discussed below. B. for doubles and triples, the fifth wheel should be all the way towards the tractor You should hear air escaping, showing the entire system is charged. The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. Secure converter gear support in raised position. Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! some large trucks have curved (convex or spot) mirrors. The road is dry and the visibility is good. The A-dolly has a single drawbar with a single, centered hitching point. Explore now! A) 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. 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 _____. 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. Locking jaws closed on To check if the converter dolly is securely coupled to the rear trailer you should: Pull gently against the pin of the second trailer. should remain in the closed position. Study section 6.2 if you can't answer all of these questions. you should check the trailer height before connecting a converter dolly to a second or third trailer. C A full trailer behind a truck Be sure air-lines are supported and glad hands are properly connected. 12, 3. The rear trailer of a double 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? the road is dry & visibility is good. A. hand valve C. use stab or controlled braking, Which of these is true? The pressure in the service line is controlled by the brake pedal and the trailer hand brake. Double and Triples Endorsement Flashcards the trailer height is right when: the trailer will be raised slightly when the converter dolly is backed under it. 6. Refers to pulling two trailers at the same time, otherwise known as "pups" or "pup trailers" because they're only about 28 feet long. Open. They are not only longer, but also need more space because they cannot be turned or stopped suddenly. Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). Page 1 - Doubles/Triples Test Study Guide for the CDL All of the above, 6. If you do, there is a problem. When checking your air lines, they must be secure and? 2023 WV Doubles - Triples CDL Practice Test 1 - CristCDL.com B. do not need to be checked as often as flat mirrors because they show a larger area Light cords firmly in sockets on trailer. Once that's complete, then its an easy push back and the When only pulling one trailer, be sure the shut-off valves are all in the fully closed position. A. opening the air tank petcock That there is no space between upper and lower fifth wheel. C. drive through quickly, With the hand valve on, you should test the trailer brakes by opening the service valve line at the rear of the rig. 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 _______. Related Question Question: What does this sign mean? If this activity does not load, try refreshing your browser. D When inspecting a converter dolly What should you check for? You are driving a 100 foot twin trailer combination at 50 mph. 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. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? You should not hear air escaping. You are doing a walk around inspection of a double or triple trailer rig. b. cell Some large trucks have curved (convex or spot) mirrors. Seriously! With the red knob pushed in on the tractor dash, the service line should have air in it. C. 3, You are doing a walk around inspection of a double or triple trailer rig. There are more critical parts to check when you have two or three trailers. A Time used (Requires timer add on). 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? B. 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 PDF Section 7: Doubles and Triples - CDL Study A-dolly. Safety should never take second place, so know your stuff! Trailer Air Tanks And Shutoff Valves - Page 50. How can you be sure you supplied air to a second trailer? To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. A. air escape from the open valve 1 At section 2 downstream, the speed is 519 m/s. B 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. Safety chains secured to trailer (s). If the fifth wheel on a coupling is too far forward, the tractor frame may hit? B. restore traction to the tires Make sure trailer height is correct. You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. [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." allow "much more space than is needed for ideal driving conditions". C. fully raised, Which of these statements about speed management and braking is true? The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. Always unlock the pintle hook with the dolly still under the rear trailer. Allow much more space than is needed for ideal driving condition. speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. Inspecting Doubles And Triples | High Road Online CDL Training When you go to the rear of the last trailer, what should you do to complete this check? d. protein. 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 "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. A connection device of one axle used to disconnect a semitrailer combination vehicle you are driving a set of doubles and a set of trailer wheels goes in a skid. 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. NPT thumbscrew style design enables easy installation. open, closed, closed: Term. What is a converter dolly? You should keep at least ____ seconds of space ahead of you. A D There is no obligation whatsoever. the fifth wheel, so trailer is raised slightly when dolly is pushed under it. 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. Which trailer should come first behind the tractor? B ADVERTISEMENT ADVERTISEMENT You are driving a triple trailer and there is a loss of air pressure in the emergency line. Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. The rear trailers shut-off valves should be open and the front closed. Good speed management says you should: You must drive through deep or flowing water. Why should you check for when inspecting the converter dolly? Which of the following is true about loading cargo into double or triple trailers? Lock pintle hook. 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? 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You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. 2 Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. Seriously! Be more careful in adverse conditions. Sketch the shape of the passage between sections 1 and 2. locked . 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. 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. 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. and possible answers include: open, free or closed, latched or closed, free or open, latched from TruckersDouble & Triple Trailer (CDL) Endorsement. This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. Which of the following will occur? A coupling device of one or two axles and a fifth wheel by which a semitrailer can be coupled to the rear of a tractor-trailer combination forming a double bottom rig Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers?

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