C Stop the vehicle by gearing down and sparingly For emergency braking you should: which of these statements about emergency steering is true? 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. The service air line is only used to control the service brakes (when you press on the brake pedal or use the trailer hand-valve). C. use controlled or stab braking, The best way to stop any skid is to: If spare tire is on converter gear (dolly), make sure it is secured. a. blood 0000008894 00000 n Locking jaws closed on When inspecting a converter dolly What should you check for? Converter dolly air tank drain valve: CLOSED. Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. The application only takes one minute. What is a converter dolly? Some large trucks have curved (convex or spot) mirrors. Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. 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. That there is no space between upper and lower fifth wheel. 0000001354 00000 n You should NOT: Select the answer that correctly completes each statement. What should you check for when inspecting the converter dolly and the pintle hook? 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. True or False? weather passes. What three methods can you use to secure a second trailer before coupling? How should the converter dolly air tank drain valve on coupled double Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. The dolly tow bar may fly up, possibly causing injury, and making it very difficult to When you do this, you should hear: Which of these statements about emergency steering is true? recouple. For emergency braking you should: When you go to the rear of the last trailer, what should you do to complete this check? S-cam brakes are the most common style brakes on large trucks today. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. Terms in this set (43) Converter dollies are used to connect: A tractor-trailer combination to another trailer. The air lines will rupture When connecting a converter dolly to a rear trailer, the trailer height must be adjusted so that it is? Converter dollies are connected to front trailers with a? On a triple combination, the shutoff valves on the rear of the last trailer should be? You can reset the test and retake it as needed. Therefore, look far ahead so you can slow down or change lanes gradually when necessary. If you do, there is a problem. If not, there is a problem. 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. Watch the wording of the question AND the answers A safe driver will look for all of the above. CDL: Doubles/Triples Flashcards | Quizlet ADVERTISEMENT ADVERTISEMENT These mirrors: make things seem smaller & further away then they really are. Once that's complete, then its an easy push back and the Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. If there is a trailer 2. You should be sure the converter dolly air tank drain valves are _______ & the pintle hook is __________. you should keep atleast __seconds of space ahead of you. You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. Pintle hook latched. D Locking jaws closed on In order to receive your Doubles and Triples endorsement, it is required that you pass the states official CDL written Knowledge exam. Once you are finished, click the button below. Open the shut-off valves at the rear of the last trailer and listen for air flow. If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). Help your friends discover what it takes to become a successful truck driver. They provide the air pressure used to operate trailer brakes. Open the emergency line shut-off valve at the rear of the last trailer. Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver. 0000006015 00000 n D Each trailer and converter dolly has one or more air tanks. Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. The individual voltage gains of the first two stages are to be equal, while the gain of the third is to be one-fourth of each of the first two. Disconnect the glad-hand at the front of the first trailer and listen for air flow. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? [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." It is very important to keep the air supply clean. 0000005733 00000 n If the dolly is a two axle unit then 1 Sketch the shape of the passage between sections 1 and 2. 0000008166 00000 n The rear trailer of a triple C. the service brakes slowly move to the fully applied position, Some large trucks have converted or "spot" mirrors. When uncoupling, you should never unlock the _______ with the dolly still under the rear trailer. There is no obligation whatsoever. 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. Take special care when pulling two and three trailers. You are driving a 100 foot twin trailer combination at 50 mph. Closed, free, 8. 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. Any trailer with a reduced ground clearance doubles/triples flip flop over from quick steering movements more easily than many other vehicles. 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 and the converter dolly air tank drain valve should be _____. open, closed, closed: Term. You want to lock your combination to a second trailer that has no spring brakes. 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 Hook dolly to front trailer. Always unlock the pintle hook with the dolly still under the rear trailer. Doubles Triples Endorsement Test Flashcards | Quizlet With the red knob pushed in on the tractor dash, the service line should have air in it. If the fifth wheel on a coupling is too far forward, the tractor frame may hit? Doubles/Triples Endorsement Flashcards | Quizlet rear trailer. 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. 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: 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. For emergency braking you should: May have poor traction due to bouncing and wheels lockup. Before coupling a trailer, you should make sure it is at the right height using? 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 A. fully lowered The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples. How many different ways of coupling and uncoupling trailer combinations are there? None Page 7-6 Commercial Driver's Manual/2.0 = Be sure air lines are supported and glad hands are properly connected. Trailer Parts Superstore - How Air Brakes Work - Eastern Marine rear brakes will not work properly. Double/Triple Flashcards | Quizlet You are driving a 100 ft twin trailer combination at 50 mph. You are visually checking the coupling of a converter dolly to the rear trailer. All material on this website is copyrighted. 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. B 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. Compressed air usually has some water and some compressor oil in it. the trailer height is right when: the trailer will be raised slightly when the converter dolly is backed under it. The dolly tow bar may fly away, possibly causing panic, and making it very difficult The shortest trailer A. always keep your vehicle to the right side of your lane Dobles - Triples Pruebas de prctica 3 - NJ 2023 - CristCDL.com you are driving a 100ft truck eith double trailers at 50mph. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. Before you can supply air to the air tanks of a second trailer you need to. to re-capture it. 10 Some do. It depends on the load The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. What should you check for when inspecting a converter dolly - Answers When does the "driver's manual" advise disconnecting the steering axle brakes to help Use the engine brake or speed retarder. You should hear air escaping, showing the entire system is charged. 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. 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. 9. What is a converter dolly? A. make things look smaller and farther away than they really are Which of these statements about the handling of doubles and triples is true? Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). It is important to check the height of the trailer before connecting a converter dolly to a trailer. Slow to the safe speed before entering, then accelerate slightly through the curve. If loading fails, click here to try again. What will happen if there is a major leak in the service air line? The road is dry and visibility is good. The emergency line valve open and release air True! 5. Therefor, if there is a major leak in your service line, you may not know it until you try to use the service brake. to do this without wheel chocks you should: supply air to the trailer air system with the tractor and then disconnect the emergency line. When the road is dry Which is most likely to tip over: B. keep gentle pressure on the brakes while going through the water and for a short distance after coming out Be sure air-lines are supported and glad hands are properly connected. 0000006836 00000 n 0000003261 00000 n A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. Pull gently against them in a low gear to make sure the brakes work. 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: B. slightly raised Florida CDL Handbook | FL CDL Handbook Coupling & Uncoupling for If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? Pull gently against the pin of the second trailer. Pull gently against the pin of the second trailer. Dont hesitate to take advantage of our practice tests in each category specific to your needs. These trailers have no parking brake. Doubles and Triples CDL Practice Test - Class A Drivers can and will get stuck on a raised railroad crossing. You are doing a walk around inspection of a double or triple trailer rig. What do you check when making a visual check of coupling? What does the drivers manual say about how much space you should keep ahead of your truck? DOUBLE/TRIPLE CDL Flashcards | Chegg.com 0000006383 00000 n CDL Doubles and Triples Test Question and Answers None of the above, 4. P0420 code honda odyssey 2011 - pjigzp.wikifit.it Mar 2 - Mar 3. cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. 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? On double and triple combinations, you must make sure that which of these is secure? To do this without wheels chocks you should: Supply air to the trailer air system with the tractor and then disconnect the emergency line. Flashcards - Doubles Triples Test #3 - FreezingBlue converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can Time used (Requires timer add on). Slow to the safe speed before entering, then accelerate slightly through the curve. Each trailer and converter dolly has one or more air tanks. When checking your air lines, they must be secure and? When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? If one air system is very low on pressure _______. which of these statements about quick steering movements and doubles/triples is true? Push the brake pedal as hard as you can and hold it there When checking the coupling system, make sure that the locking jaws are around the shank of the. A) closed . The road is dry and visibility is good. A. allow "much more space" than is needed for ideal driving conditions Question 3 Explanation: All of the above. 2. 0000001375 00000 n Make sure to visually inspect the fifth wheel and that the locking mechanism is 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. Opening the shut off valves on the rear most trailer will ensure the lines are flowing 11 A converter dolly is still under the second trailer when you unlock the pintle hook. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space True! 27. the road is dry & visibility is good. Calculate the voltage gain of each. Those that do not have spring brakes have emergency brakes that work from the air stored in the trailer air tank. you want to hook your combination to a second trailer that has no spring brakes. Do converter dollies have spring brakes? The road is dry, and visibility is good. Secure converter gear support in raised position. Time allowed (Requires timer add on). Becoming A Truck Driver is a dream we've all pondered at some point in our lives. You should avoid traveling next to others when possible. kingpin. How do you check to make sure trailer height is correct before coupling? 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]. unsafe slow down even further, or better yet, find a safe haven and park until the These valves permit closing the air lines off when another trailer is not being towed. B. restore traction to the tires Nothing, the weight of the trailer will keep it in place, 10. How can you test that air flows to all trailers? In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. Should the converter dolly air-tank drain valve be open or closed on a double trailer combination? (done) Chp 23: Cash Flow + Working Capital, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Allow more following distance. Number of wrong answers. B. for doubles and triples, the fifth wheel should be all the way towards the tractor How To Use Cruise Control Effectively As A Truck Driver. This is CDL Doubles and Triples Test 3in our original Classic Mode. Their drawbars differentiate them. The pressure in the service line tells how much pressure the relay valves should send to the trailer brakes. A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. 0000010306 00000 n Seriously! Types of converter dollies. 0000001107 00000 n If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. re-couple, You can if you want to, it does not matter. 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. If you are driving a 200-foot triple at 35 mph, what is the minimum amount of space (in seconds) that you should keep ahead of you? You will speak with recruiters today. You are visually checking the coupling of a converter dolly to the rear trailer. C They provide the air pressure used to operate trailer brakes. To check air flows to all trailers, you should let air pressure reach normal then? C HlTo xGf`{iIMh-x||?pbE':X4ZZZRbu7 uvi_RHUkVXBVu{^B3 4e/iw\]RE] YY7i)e V*h(++WQ-]Xm9c5yU6BS" 5HiL,[b)ee:t/ )%BVGpU7T\ZJD Hb```f``b`c``e@ (Q6_* The road is dry and visibility is good. A good and safe driver will always look out for ______. Air pressure is sent from the air tanks to the brakes by relay valves. Visually check to make sure that the lead trailer is slightly higher than the center of 7.3 Inspecting Doubles and Triples = Additional Things to Check During a Walkaround Inspection. Doubles and triples are extremely prone to control issues and must be Email Updates When New Articles Are Posted. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. Which f these will result in the best control on curves? You should NOT: You are driving a set of doubles and a set of trailer wheels goes into a skid. The trailer is at the correct height when. You may be timed. All ABS equipped units You should hear air escaping, showing the entire system is charged. You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. Inspecting Doubles And Triples | High Road Online CDL Training The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. Never, 9. 7. Have little braking power because they are small When uncoupling the converter dolly Why should you never unhook the The application only takes one minute. Because of this, which of the following vehicle parts is most likely to tip over? A. open Doubles and triples are more likely to overturn than other combination vehicles because of the whip cracking effect. How should you test the coupling? Study section 6.2 if you can't answer all of these questions. On the middle trailer of a set of triples? 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. There are two types of converter dollies. The emergency brakes come on whenever air pressure in the emergency line is lost. 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. When you do this, you should hear: Ais escape from the open valve. Question 4. Ship to Store. We are an independent company focused on providing valuable motor vehicle and permit practice test information. To help avoid mistakes, colors are sometimes used. C. 3, You are doing a walk around inspection of a double or triple trailer rig. When driving a truck with more than one trailer, which trailer should be first behind the truck? A. require shorter stopping distances than full ones B 3. 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. which of these statements about the handling of doubles and triples is true ? C. fully raised, Which of these statements about speed management and braking is true? Seriously! B Which of these statements about managing space to the sides is true? When only pulling one trailer, be sure the shut-off valves are all in the fully closed position. 0000007032 00000 n Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. A. hand valve You are driving with more than one trailer. you are driving on a slippery road during the day. Wait for air pressure to reach normal, then push in the red trailer air supply knob. The converter dolly air tank drain valve on coupled double/triple trailers should be: Closed. Please use the form below to contact our customer service or sales team. But the brakes will hold only as long as there is air pressure in the trailer air tank. Any vehicle required by federal regulations to be placarded while transporting hazardous materials.