You want to lock your combination to a second trailer that has no spring brakes. You should hear air escaping, showing the entire system is charged. Be more careful in adverse conditions. If you crossed the air lines, you could drive away, but you would not have trailer brakes. For all brakes to work on a triple combination, you must have air supply? You are doing a walkaround inspection of a double or triple trailer rig. 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. What three methods can you use to secure a second trailer before coupling? 0000003261 00000 n
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 You should reduce your speed by about _____ on a wet road. you should keep atleast __seconds of space ahead of you. You should keep at least ___ seconds of space ahead of you. the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. Pintle-eye of dolly in place in pintle hook of trailer (s). How can you test that air flows to all trailers? Only trailers designed to be pulled with another trailer behind it will have a shut off valve. %PDF-1.2
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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. The road is dry and visibility is good. B. for doubles and triples, the fifth wheel should be all the way towards the tractor Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. 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. When driving doubles or triples how should they be driven to avoid rollover or jackknifing: When checking the fifth wheel, you should make sure that it has enough? 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? How many different ways of coupling and uncoupling trailer combinations are there? Make sure you can hear air escaping with the valve closed. You will speak with recruiters today. C. posted speed limits on curves are safe for all trucks, Empty trucks: B. allow one vehicle length for every 10,000 lbs of gross vehicle weight B. slow to a safe speed before entering the curve, then accelerate slightly through it For emergency braking you should: You are doing a walk around inspection of a double or triple trailer rig. B. you should avoid traveling next to others whenever possible To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? Therefore, look far ahead so you can slow down or change lanes gradually when necessary. 11 Seriously! 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. Mar 2 - Mar 3. how can you be sure you supplied air to a second trailer? A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. Open the shut-off valves at the rear of the last trailer and listen for air flow. 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? You should be sure the converter dolly air tank . They provide the air pressure used to operate trailer brakes. 10. You are doing a walk around inspection of a double or triple trailer rig. b. cell You are driving a triple trailer and there is a loss of air pressure in the emergency line. 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]. When driving a truck with more than one trailer, which trailer should be first behind the truck? 0000005554 00000 n
Use the engine brake or speed retarder. While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. Chock the tires, park on level ground and charge the trailer air tank if it does your vehicle is so long that you must swing wide to make a turn. C. the service brakes slowly move to the fully applied position, Some large trucks have converted or "spot" mirrors. Closed, free, 8. However, converter dollies and trailers built before 1975 are not required to have spring brakes. Slow to a safe speed before entering the curve, then coast through the curve. You can test that air is flowing to all trailers by opening? 0000003240 00000 n
Which of these statements about managing space to the sides is true? Locking jaws closed on You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. Question 3 Explanation: All of the above. which of these statements about the handling of doubles and triples is true ? The Doubles and Triples written CDL Exam is required for your doubles and triples endorsement. B When checking your air lines, they must be secure and? Often do not have spring brakes This has the same value as the %%WRONG_ANSWERS%% Variable on the Final Screen. The dolly will have a yellow lamp on the drivers (left) side. Older trailers do not have spring brakes. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. A A dolly has lights, air tanks, air relays, air lines, air brakes, ABS, electrical connections, etc. A sudden movement with the steering wheel can result in a tipping over rear trailer. The crack the whip effect will topple the rear trailer first. Time allowed (Requires timer add on). you are doing a walkaround inspection of a double or triple trailer rig. B. do not need to be checked as often as flat mirrors because they show a larger area Open the emergency line shut-off valve at the rear of the last trailer. 4. Air pressure is sent from the air tanks to the brakes by relay valves. 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. 9 10 You can find it here: High Road 2.0. C. always keep your vehicle to the left side of your lane, When testing the coupling of double trailers, the landing gear of the rear trailer should be: It depends on the load and possible answers include: open, free or closed, latched or closed, free or open, latched from TruckersDouble & Triple Trailer (CDL) Endorsement. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. Should I Be A Truck Driver? They are not only longer, but also need more space because they cannot be turned or stopped suddenly. The emergency brakes come on whenever the air supply knob is pulled out or the trailer is disconnected. C The last trailer in a combination is most likely to turn over. Those that do not have spring brakes have emergency brakes that work from the air stored in the trailer air tank. Stay up to date on truck driving industry news. Doubles and triples must be driven very smoothly to avoid rollover or jackknife. 0000001354 00000 n
You are driving with double trailers and must use your brakes to avoid a crash. 11 During normal operation the brakes of the double/triple trailer are controlled by: They are filled by the emergency (supply) line from the tractor. The A-dolly has a single drawbar with a single, centered hitching point. 0000001956 00000 n
You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. What does the drivers manual say about how much space you should keep ahead of your truck? How much space should be between the upper and lower fifth wheel? Email Updates When New Articles Are Posted. 4. 2. C. may have poor traction due to bouncing and wheel lockup, Before you can supply air to the air tanks of a second trailer you need to: [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]. Watch the wording of the question AND the answers A safe driver will look for all of the above. B. open; latched You are driving with double trailers and must use your brakes to avoid a crash. New! A dolly should be pulled out from a rear trailer using? 60607. Park the rear trailer against another trailer, chock the tires and lock the trailer A. fully lowered The rear trailer does not have shut-off valves. Which of the following is true about loading cargo into double or triple trailers? The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. 0000003998 00000 n
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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. C. closed; unlatched, Which of these will result in the best control on a curve? To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space 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. to re-capture it. What types of trailers can get stuck on raised crossings? [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! Before coupling a trailer, you should make sure it is at the right height using? Converter dolly air tank drain valve: CLOSED. you should avoid traveling next to others when possible. with the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. If this lamp is illuminated and does not go out, They provide the air pressure used to operate trailer brakes. Each tank has a drain valve on it, and you should drain each tank every day. All trademarks are property of their respective owners. 0000003977 00000 n
This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. Which of these is the correct answer? Make sure pintle hook is latched. B 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. 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? 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 not use the trailer hand valve while driving? Lock pintle hook. These mirrors: Hit the article to see the way to back up your trailer like a pro! 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. 0000009556 00000 n
All of the above, 6. The dolly tow bar may flip up causing bodily injury and making it very difficult to d. protein. What is a converter dolly? Be sure air-lines are supported and glad hands are properly connected. Make sure you have large enough gaps before entering or crossing traffic. Our normal business hours are Monday-Friday 8 a.m. to 5 p.m. (Pacific Time). C Always unlock the pintle hook with the dolly still under the rear trailer. What happens if you cross the Emergency Air Line and the Service Air Line? A. release the spring brakes and check for movement A. always keep your vehicle to the right side of your lane speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? However there are some states that allow doubles that are each 48 feet in length. 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 D 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). fifth wheel, so trailer is raised slightly when dolly is pushed under it. C. use stab or controlled braking, Which of these is true? Because of this, which of the following vehicle parts is most likely to tip over? If the converter dolly is close to your semitrailer, you should wheel it into position? The dolly tow bar may fly away, possibly causing panic, and making it very difficult 5. 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. Safety chains should be secured to trailer(s). The crack the whip effect that troubles trucks with trailers. What three methods can you use to secure a second trailer before coupling? You should be sure the converter dolly air tank drain . NPT thumbscrew style design enables easy installation. Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? 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. Open What do you check when making a visual check of coupling? what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? A connection device of one axle used to disconnect a semitrailer combination vehicle 0000007508 00000 n
Each trailer and converter dolly has one or more air tanks. 0000004668 00000 n
For emergency braking you should: 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.
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