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9 Compressed air usually has some water and some compressor oil in it. If the converter dolly is close to your semitrailer, you should wheel it into position? Doubles/Triples Endorsement Flashcards | Quizlet which of these statements about the handling of doubles and triples is true ? The crack the whip effect will topple the rear trailer first. Use controlled or stab braking Describe what the trailer air supply control does. 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. The weight of the individual trailers will have no noticeable effect on the handling of the vehicle, The weight of all trailers should be nearly the same, within 2% of each other. D 0000001956 00000 n They are filled by the emergency (supply) line from the tractor. B. closed What happens if you cross the Emergency Air Line and the Service Air Line? To check air flows to all trailers, you should let air pressure reach normal then? Each trailer and converter dolly has one or more air tanks. locked . Converter dolly air tank drain valve: CLOSED. Dobles - Triples Pruebas de prctica 3 - NJ 2023 - CristCDL.com the trailer height is right when: the trailer will be raised slightly when the converter dolly is backed under it. 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If you do, the brakes may not work correctly. Any trailer with a reduced ground clearance a. blood Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? How To Use Cruise Control Effectively As A Truck Driver. kingpin. Light cords firmly in sockets on trailer. High Road 2.0! you are driving on a slippery road during the day. Charge the system and pump the brakes with the window down. 0000006195 00000 n 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. and ensuring it is secure. %PDF-1.2 % C Any time you have to Leave a Reply Cancel reply - Free CDL Practice Tests 2022 Submit your email at the end of the test. C. the service brakes slowly move to the fully applied position, Some large trucks have converted or "spot" mirrors. C. foot pedal, Which of these statements about managing space to the sides is true? Join 50,000+ users around America to get your Commercial Driver License today! A connection device of one axle used to disconnect a semitrailer combination vehicle go to the rear of the second trailer and open the emergency line shut off, before you can supply air to the air tanks of the second trailer you need too, open the shut-off valves at the rear of the first trailer & close the shut-off valves at the rear of the second trailer. Provides a snug fit to eliminate unwanted seepage of air or water. 0000001107 00000 n B. pull gently against the pin of the second semitrailer Before you can supply air to the air tanks of a second trailer you need to: Open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of second trailer. 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. Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. you are driving a set of doubles and a set of trailer wheels goes in a skid. Study section 6.2 if you can't answer all of these questions. When driving a double or triple trailer, greater care must be given to. When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. All of the above, 6. A. air escape from the open valve C. fully raised, Which of these statements about speed management and braking is true? Doubles and triples must be driven very smoothly to avoid rollover or jackknife. You will speak with recruiters today. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? B Doubles and Triples CDL Practice Test - Class A Drivers To prevent trailers from rolling over, you must steer gently and go slowly around corners, on ramps, off ramps and curves. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. The shortest trailer rear brakes will not work properly. 0000008166 00000 n utilize the brakes. Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. When testing the coupling of the double trailer the landing gears of the rear trailer should be: You want to hook your combination to a second trailer that has no spring brakes. We are an independent company focused on providing valuable motor vehicle and permit practice test information. When inspecting doubles and triples you must make sure there is air all the way to the back of the last trailer, otherwise what may not work? Doubles and triples are more likely to turn over than other combination vehicles because of what effect? On the middle trailer of a set of triples? 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 To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space A. brake and downshift in a curve the rig will continue moving in a straight line no matter how much the steering wheel is turned. This is CDL Doubles and Triples Test 3in our original Classic Mode. A. open the shut-off valves at the rear of both trailers Before coupling a trailer, you should make sure it is at the right height using? 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. When you turn with the tractor/triple trailer combination the wheels that off-track (cheat) the most are: You should check trailer height before connecting a converter dolly to a second or third trailer. D For emergency braking you should: May have poor traction due to bouncing and wheels lockup. CDL License Requirements State By State. Then, the air loss from the leak will lower the air tank pressure quickly. Each trailer and converter dolly has one or more air tanks. Good speed management says you should: You must drive through deep or flowing water. D How do you check to make sure trailer height is correct before coupling? 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: 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: You should hear air escaping, showing the entire system is charged. Pull gently against the pin of the second trailer. 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. When coupling twin trailers, a converter dolly is. A full trailer behind a truck 0000008894 00000 n 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. We wish you the best of luck in your endeavors and are pleased to be of assistance. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. Never pull any trailer without visually inspecting the fifth wheel locking bar Air Storage and Drain Tanks: Air storage tanks are used to hold compressed air. Which is most likely to tip over: These valves permit closing the air lines off when another trailer is not being towed. You must treat a flashing red signal as you would treat a STOP sign. B. are the easiest to stop since there is no shifting cargo 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. What three methods can you use to secure a second trailer before coupling? Double/Triple Flashcards | Quizlet A. open A All material on this website is copyrighted. You are doing a walk around inspection of a double or triple trailer rig. Doubles/triples flip flop over from quick steering moves more easily than many vehicles. Inspecting Doubles And Triples | High Road Online CDL Training 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 _____. you are driving at night and you must dim your headlights for traffic. The pressure in the service line tells how much pressure the relay valves should send to the trailer brakes. It's a fifth wheel, not a sixth wheel. For emergency braking you should: Usually need a glad hand converter Use the engine brake or speed retarder. You open the emergency line shut-off valve at the rear of the last trailer and hear air escaping. Correct answer percentage. Stay up to date on truck driving industry news. Never, 9. which of these is not a good thing to do when driving on slippery roads? A) closed . You have not finished your quiz. If this activity does not load, try refreshing your browser. CDL Doubles and Triples Test Question and Answers Does a converter dolly have a separate air tank? - Wisdom-Advices Before you can supply air to the air tanks of a second trailer you need to. A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. True or False? Some large trucks have curved (convex or spot) mirrors. A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. Chock the tires, park on level ground and charge the trailer air tank if it does These valves permit closing the air lines off when another trailer is not being towed. You are driving a 100-feet truck with double trailers at 30 mph. A) one inch of space . 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. This means. A good and safe driver will always look out for ______. 0000009556 00000 n Which of these statements about managing space to the sides is true? What's a converter dolly? Have little braking power because they are small The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. 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? fumoto drain valve. On a triple combination, the shutoff valves on the rear of the last trailer should be? What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? 2003-2023 Chegg Inc. All rights reserved. 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? Doubles and triples are more likely to turn over than other combination vehicles because of the "crack- the-whip" effect. Doubles Triples Endorsement Test Flashcards | Quizlet you are doing a walkaround inspection of a double or triple trailer rig. All rights reserved Site Map. When inspecting the air brakes on doubles and triples, you wait for air pressure to reach normal, then push in the red trailer air supply knob. B The Home Depot Logo The couplers have a rubber seal that prevents air from escaping. Flashcards - Doubles Triples Test #3 - FreezingBlue 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 Any items you have not completed will be marked incorrect. Time limit varies by state. C. posted speed limits on curves are safe for all trucks, Empty trucks: When only pulling one trailer, be sure the shut-off valves are all in the fully closed position. C Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver. However, converter dollies and trailers built before 1975 are not required to have spring brakes. When you do this, you should hear: The road is dry and the visibility is good. The road is dry and visibility is good. c. iron This will supply air to the emergency (supply) lines. Please use the form below to contact our customer service or sales team. 0000006383 00000 n Double and Triples Endorsement Flashcards In the coupling system, the locking jaws should be fixed around? cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and Air escape from the open valve Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? to re-capture it. This has the same value as the %%TIME_USED%% Variable on the Final Screen. You should be sure the converter dolly air tank drain . 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. True! True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. We are here to help. Make sure to visually inspect the fifth wheel and that the locking mechanism is On double and triple combinations, you must make sure that which of these is secure? 1) the first one is to pump down the air pressure in the system between 20 and 45psi (pounds per square inch) the trailer air supply will pop out, shutting air off to the trailer. The Verge logo. 11 With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. 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. You should keep at least ____ seconds of space ahead of you. Locking jaws closed on You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. A bent or damaged kingpin on a coupling should be? A. release the spring brakes and check for movement What is a converter dolly? Open The rear trailer of a triple Be sure air-lines are supported and glad hands are properly connected. 6. To do this without wheels chocks you should: Supply air to the trailer air system with the tractor and then disconnect the emergency line. A. countersteer You want to lock your combination to a second trailer that has no spring brakes. The number of correct answers. safe speed would be 40 MPH. If loading fails, click here to try again. A Air will not be available to release the trailer spring brakes (parking brakes). Why should you not use the trailer hand valve while driving? 2 You are driving with double trailers and must use your brakes to avoid a crash. At section 2 downstream, the speed is 519 m/s. Open the shut-off valves at the rear of the last trailer and listen for air flow. NPT thumbscrew style design enables easy installation. At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. How much space should be between the upper and lower fifth wheels? 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. How can you be sure you supplied air to a second trailer? Please visit using a browser with javascript enabled. [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]. Double and Triples Part 1 Flashcards - flashcardmachine.com While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. Often do not have spring brakes The application only takes one minute. you can fuck a pornstar craigslist cars and trucks for sale by owner; kd linear actuator kdpt007 what is ait in the army; native american spiritual cleansing prayer simple spectrum coupon code; . Blue is used for the service lines, and red for the emergency (supply) lines. B The Doubles and Triples written CDL Exam is required for your doubles and triples endorsement. The road is dry and visibility is good. Which of the following must be connected when coupling tractor to trailer or trailer to trailer? B. use only the trailer brakes Ensuring the safety of the public starts with a thorough The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. You should NOT: You are driving a set of doubles and a set of trailer wheels goes into a skid. They provide the air pressure used to operate trailer brakes. These mirrors: make things seem smaller & further away then they really are. This would be very dangerous. which of these statements about quick steering movements and doubles/triples is true? with the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. 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. Opening the shut off valves on the rear most trailer will ensure the lines are flowing D True! The rear trailers shut off valves should be closed and the front open to allow air to the when driving a truck with more than one trailer, which trailer should be first behind the truck? you are visually checking the coupling of a converter dolly to the rear trailer. 0000005664 00000 n P0420 code honda odyssey 2011 - pjigzp.wikifit.it A. hand valve None C. 3, You are doing a walk around inspection of a double or triple trailer rig. Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. 3. Becoming A Truck Driver is a dream we've all pondered at some point in our lives. C Sketch the shape of the passage between sections 1 and 2. Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. Converter dolly air tank drain valve: CLOSED. Locking jaws open 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. These mirrors: Make things seem smaller and further away than they really are. You should not hear air escaping. 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? Older trailers do not have spring brakes. When connecting a converter dolly to a rear trailer, the trailer height must be adjusted so that it is? None of the above, 4. Make a sketch that explains this phenomenon in terms of a feedback loop . B. do not need to be checked as often as flat mirrors because they show a larger area B. allow one vehicle length for every 10,000 lbs of gross vehicle weight What should you check for when inspecting a converter dolly - Answers 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. Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? B. keep gentle pressure on the brakes while going through the water and for a short distance after coming out Disconnect the glad-hand at the front of the first trailer and listen for air flow. Go to Section 4: Other Topics This question is in Section 4: Other Topics of our CDL Test Guide. 4. Be more careful in adverse conditions. 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. Unless you are draining the condensation out of the air tank, then the drain valve Your tractor protection valve control should pop out, or go from normal to emergency position, when air pressure falls into what range? Connect Converter Dolly to Front Trailer Back first semitrailer into position in front of dolly tongue. TestPermit.com is not affiliated, endorsed, or sponsored by state agencies or any motor vehicle and any other departments in the United States, Canada, UK. You should hear air escaping, showing the entire system is charged. You are driving a tractor with multiple trailers. Seriously! How much space should be between the upper and lower fifth wheel? 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. If one air system is very low on pressure _______. Go to the rear of the rig. If you are only pulling one trailer, make certain the valve is fully in the closed position or it will leak air out of the air system. You are driving a 100 ft twin trailer combination at 50 mph. What does the Driver's manual say about how much space you should keep ahead of your truck? the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. For emergency braking you should: A Push the brake pedal as hard as you can and hold it there B These dollies will have a yellow lamp on the left side of the dolly Questions You Should Know For Doubles And Triples 1. In an application in which vGS=vDS=Vsupply=1.8V,v_{G S}=v_{D S}=V_{\text { supply }}=1.8 \mathrm{V},vGS=vDS=Vsupply=1.8V, a drain current of 2 mA is required of a device of minimum length of 0.18m.0.18 \mu \mathrm{m}.0.18m. B. you can almost always stop more quickly than you can turn Finsbury Pump Systems 400l (Single Stage) 5.5hp Honda Gx Petrol Engine B When connecting two trailers the converter dolly is connected to the rear trailer first. Trailer Air Tanks And Shutoff Valves - Page 50. When does the "driver's manual" advise disconnecting the steering axle brakes to help 0000008187 00000 n When you go to the rear of the last trailer, what should you do to complete this check? then there is a problem with the ABS system. On the first trailer in a set of doubles? You need to brake in order to regain control. What three methods can you use to secure a second trailer before coupling? Open, latched Ensuring the safety of the public starts with a thorough inspection of all equipment. A Hb```f``b`c``e@ (Q6_* you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. True! Remember however, that is just a suggestion. 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. If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen? Leave the emergency line shut-off valve closed and open the service line valve. Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? There are two types of converter dollies. A thorough pre-trip inspection should catch any major service line leaks before you begin your trip. The pintle hook? 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. the fifth wheel, so trailer is raised slightly when dolly is pushed under it. Doubles and triples must be driven very smoothly to avoid rollover or jackknife. A truckers workspace is a small moving office Read More. All trademarks are property of their respective owners. Converter dollies: The road is dry and the visibility is good. 0000005345 00000 n They are filled by the emergency (supply) line from the tractor. 0000008915 00000 n ), a 15 year truck driving veteran, in January 2007. Tractor-trailers are considered combination vehicles. Which of the following will occur? Push the brake pedal as hard as you can and hold it there A Which trailer should come first behind the tractor? . Open the emergency line shut-off valve at the rear of the last trailer. how much space should be between the upper and lower fifth wheel? unsafe slow down even further, or better yet, find a safe haven and park until the In order to receive your Doubles and Triples endorsement, it is required that you pass the states official CDL written Knowledge exam.