the converter dolly air tank drain valve should be

Typically depends on the axle count. A vehicle transporting hazardous materials is required to display placards where? 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. What is the most common foundation brake found on heavy vehicles? The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. Should the shut-off valves on the rear of the last trailer be open or closed? These mirrors: Make things seem smaller and further away than they really are. Dont hesitate to take advantage of our practice tests in each category specific to your needs. Only a certified diesel mechanic can check this. Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. 2003-2023 Chegg Inc. All rights reserved. Please use the form below to contact our customer service or sales team. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? Which f these will result in the best control on curves? 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? You are driving with more than one trailer. You must treat a flashing red signal as you would treat a STOP sign. 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. can and will get stuck on a raised railroad crossing. rear brakes will not work properly. When you are pulling trailers, which of the following statements is true about steering? While it is general practice to make blue the service line, red the emergency line, and green the electrical line, these colors are not required by any laws or regulations. D air throughout the system. 0000001354 00000 n 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 _______. If there is a trailer Which of the following is true about loading cargo into double or triple trailers? A dolly should be pulled out from a rear trailer using? Stay up to date on truck driving industry news. 0000006383 00000 n The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. In normal operation, trailer service brakes should be operated by? What should you check for when inspecting the converter dolly? Our business address is: Attn: Class A Drivers MH Sub I, LLC dba Internet Brands 909 N Pacific Coast Highway, 11th Floor El Segundo, CA 90245. On double and triple combinations, you must make sure that which of these is secure? d. protein. Converter dollies: Converter dolly air tank drain valve: CLOSED. The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples. %PDF-1.2 % Number of wrong answers. If you crossed the air lines, you could drive away, but you would not have trailer brakes. 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. When the road is dry Some areas of concern are discussed below. When you do this, you should hear: Which of these statements about emergency steering is true? You are driving a tractor with multiple trailers. What's a converter dolly? A thorough pre-trip inspection should catch any major service line leaks before you begin your trip. 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. To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? the best way to keep brakes from getting too hot while going down long grades is to : go slow and use only light, steady pressure on the brakes, you are driving a 100ft truck with double trailers at 30mph. Time limit varies by state. B. slightly raised 3. Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). 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: The lighter semitrailer should be in first position behind the tractor. What is a converter dolly? 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 0000009556 00000 n It depends on the load How much space should be between the upper and lower fifth wheels? Secure converter gear support in raised position. When you do this, you should hear: A-dolly. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. For all brakes to work on a triple combination, you must have air supply? The pintle hook? Good speed management says you should: You must drive through deep or flowing water. 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. 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. 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; . A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. However, converter dollies and trailers built before 1975 are not required to have spring brakes. If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen? True or False? 0000001107 00000 n behind the shut-off valve then they need to remain open. More driving knowledge, questions and answers, online practice tests for obtaining a drivers . When the road is slippery There are two types of converter dollies. C 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. When checking your air lines, they must be secure and? The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. The rear trailers shut-off valves should be open and the front closed. A. require shorter stopping distances than full ones The air lines will rupture The pintle hook should always be secure when the vehicle is in motion. When connecting the glad hands, press the two seals together with the couplers at a 90-degree angle to each other. Their drawbars differentiate them. 8. 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. 1. Time used (Requires timer add on). Use the engine brake or speed retarder. B Which of these statements about the handling of doubles and triples is true? What happens when there is a major leak in the emergency air line? 0000004689 00000 n Like a trailer, a dolly equipped with ABS will have a yellow indicator light on the left side. Use controlled or stab braking View More Details. You are doing a walk around inspection of a double or triple trailer rig. If there is Any trailer with a reduced ground clearance C. make things look larger and closer to you than they really are, When hauling triple trailers at a speed less than 40 mph, you should leave at least _____ second(s) for every ten feet of your truck between you and the vehicles ahead of you. Please wait while the activity loads. What value of channel width must the design use? You are driving a 100-feet truck with double trailers at 30 mph. If one air system is very low on pressure _______. Ensuring the safety of the public starts with a thorough inspection of all equipment. You should check the height of the trailer before connecting a converter dolly to a second or third trailer. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. Open, latched 0000010285 00000 n You are driving a 100 foot twin trailer combination at 50 mph. C. add "one car length for every 10 mph", Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Incidental Motions & Motions that Bring a Que. You need to brake in order to regain control. Close the emergency line shut-off valve at the rear of the trailer. B. restore traction to the tires If it goes low enough, the trailer emergency brakes will come on. On the middle trailer of a set of triples? In order to receive your Doubles and Triples endorsement, it is required that you pass the states official CDL written Knowledge exam. 2 All material on this website is copyrighted. When connecting two trailers the converter dolly is connected to the rear trailer first. Newer trailers have spring brakes just like trucks and truck tractors. What three methods can you use to secure a second trailer before coupling? Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. When you do this, you should hear: Ais escape from the open valve. A. the total stopping distance of a truck is the distance it takes to stop once the brakes are put on at any speed 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 This will supply air to the emergency (supply) lines. C 1/32 to 3/32 of an inch. How can you be sure you supplied air to a second trailer? Refers to pulling two trailers at the same time, otherwise known as "pups" or "pup trailers" because they're only about 28 feet long. A. allow "much more space" than is needed for ideal driving conditions A. use light, steady pressure on the brake pedal That there is no space between upper and lower fifth wheel. When uncoupling a rear trailer, you should remove some weight from the dolly by? 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. Safety chains should be secured to trailer(s). Light cords firmly in sockets on trailer. Which of these is most likely too occur? Hit the article to see the way to back up your trailer like a pro! Air escape from the open valve If the converter dolly is close to your semitrailer, you should wheel it into position? Push the brake pedal as hard as you can and hold it there 0000001375 00000 n dress gifs. If there is air there, then there is air towards the cab You want to hook up to the first trailer, then the converter dolly while it is lined up in C. 3, You are doing a walk around inspection of a double or triple trailer rig. The driver will be required to complete this requirement in three eight hour shifts. 1/2 to 3/4 of an inch There is no obligation whatsoever. For emergency braking you should: For emergency braking you should: May have poor traction due to bouncing and wheels lockup. Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver. Pull gently against them in a low gear to make sure the brakes work. Always test the trailer brakes before driving with the hand valve or by pulling the air supply (tractor protection valve) control. They provide the air pressure used to operate trailer brakes. The heavier trailer should be in the rear. You are driving with double trailers and must use your brakes to avoid a crash. A) closed . When only pulling one trailer, be sure the shut-off valves are all in the fully closed position. 0000006836 00000 n Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. Each trailer and converter dolly has one or more air tanks. Closed, free, 8. 0000005554 00000 n how much space should be between the upper and lower fifth wheel? C The heaviest trailer A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. B. pull gently against the pin of the second semitrailer then there is a problem with the ABS system. Doubles and triples take up more space than other commercial vehicles. D the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. This has the same value as the %%TIME_USED%% Variable on the Final Screen. Study section 6.2 if you can't answer all of these questions. The road is dry, and visibility is good. Only trailers designed to be pulled with another trailer behind it will have a shut off valve. B. slightly open B. you should avoid traveling next to others whenever possible It is important not to let water and oil build up in the air tanks. Try our free CDL Doubles and Triples Test Question and Answers Quiz online. Open You are driving with double trailers and must use your brakes to avoid a crash. True! 6. Any combination of vehicles with a gross combined weight rating (GCWR) of 26,001 or more pounds, providing the gross vehicle weight rating (GVWR) of the vehicle being towed is in excess of 10,000 pounds. 0000006015 00000 n If this lamp is illuminated and does not go out, 11 During normal operation the brakes of the double/triple trailer are controlled by: C Pintle hook latched. If not, there is a problem. will have a lamp on the drivers side. Which of these is the correct answer? 0000002446 00000 n 0000007487 00000 n 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). All trademarks are property of their respective owners. By clicking on "Sign Up", you agree to our Terms of Use and Privacy Policy. B. you need about four times as much stopping distance at 40 mph as at 20 mph C Why is there still destructive interference? Doubles and triples are extremely prone to control issues and must be Which is most likely to tip over: Be sure air-lines are supported and glad hands are properly connected. Explore now! you are visually checking the coupling of a converter dolly to the rear trailer. What will happen if there is a major leak in the service air line? 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 tipping over rear trailer. When checking the coupling system, make sure that the locking jaws are around the shank of the. you should check the trailer height before connecting a converter dolly to a second or third trailer. Clean the couplers and rubber seals before a connection is made. Which trailer should come first behind the tractor? how can you be sure you supplied air to a second trailer? Go to the rear of the rig. Compressed air usually has some water and some compressor oil in it. front of the second trailer. Leave the emergency line shut-off valve closed and open the service line valve. Ship to Store. You are doing a walk around inspection of a double or triple trailer rig. D. Make sure the spare tire is secured, if it has one. This is CDL Doubles and Triples Test 3in our original Classic Mode. Visually check to make sure that the rear trailer is slightly lower than the center of the This has the same value as the %%TOTAL%% Variable on the Final Screen. 0000005345 00000 n 1/4 in. Allow much more space than is needed for ideal driving condition. Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. How do you check to make sure trailer height is correct before coupling? Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? B. do not need to be checked as often as flat mirrors because they show a larger area What three methods can you use to secure a second trailer before coupling? Becoming A Truck Driver is a dream we've all pondered at some point in our lives. D In order to receive your Doubles and Triples endorsement, it is required that you pass the state's official CDL written Knowledge exam. Time allowed (Requires timer add on). second trailer will be connected, The dolly will have a yellow lamp on the left side, The dolly will have a yellow lamp on the right side, The dolly will have a red lamp on the left side, The dolly will have a red lamp on the right side. Pull gently against the pin of the second trailer. If you're pulling more than one trailer, all valves should be open except the very last trailer, which should have all valves in the closed position. Slow to the safe speed before entering, then accelerate slightly through the curve. When coupling twin trailers, a converter dolly is. with the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. The crack the whip effect will topple the rear trailer first. Park on level ground, put chock on the tires, and charge the air tank. slow to safe speed before entering, then accelerate slightly through the curve. What is a converter dolly? locked . With the red knob pushed in on the tractor dash, the service line should have air in it. What types of trailers can get stuck on raised crossings? The trailer brakes will unlock Connect Converter Dolly to Front Trailer Back first semitrailer into position in front of dolly tongue. Pull gently against the pin of the second trailer. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. which of these statements about managing space to the sides is true? 0000008187 00000 n 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? They are filled by the emergency (supply) line from the tractor. Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. Flammable materials in the front trailer then it must have the placards on that trailer. Make sure to visually inspect the fifth wheel and that the locking mechanism is Then, the air loss from the leak will lower the air tank pressure quickly. These trailers have no parking brake. Why should you use chocks when parking a trailer without spring brakes? 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. A. completely open Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. What does the drivers manual say about how much space you should keep ahead of your truck? The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. Correct answer percentage. The number and size of air tanks varies among vehicles. 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. A Open, latched B Open, free C Closed, latched D Closed, free 28. If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? You can reset the test and retake it as needed. A dolly is like a very short trailer, with a ring hitch on the front and a fifth wheel on top. A. brake and downshift in a curve This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. You may not notice a major leak in the service line until you try to put the brakes on. A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. Simply click in your answer to each CDL practice test question. A green traffic light allows the driver to go. Park the rear trailer against another trailer, chock the tires and lock the trailer Any trailer, 7. speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. It is very important to keep the air supply clean. If loading fails, click here to try again. What should you check for when inspecting a converter dolly? recouple. You are driving with double trailers and must use your brakes to avoid a crash. A. fully lowered What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly? You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. On a triple combination, the shutoff valves at the rear off the middle trailer should be? [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]. The last trailer in a combination is most likely to turn over. 0000004668 00000 n Always unlock the pintle hook with the dolly still under the rear trailer. you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. This has the same value as the %%SCORE%% Variable on the Final Screen. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. A full trailer behind a truck A. air escape from the open valve Use only the trailer brakes 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? 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: You should keep at least ____ seconds of space ahead of you. Hb```f``b`c``e@ (Q6_* B. you can almost always stop more quickly than you can turn you should avoid traveling next to others when possible. Calculate the Mach number at section 2. The dolly tow bar may fly up Closed, latched How can you test that air flows to all trailers? Make sure you can hear air escaping with the valve closed. You should hear air escaping, showing the entire system is charged. A. countersteer Either the front or the rear brakes will not work properly or fully. 0000008894 00000 n Open the emergency line shut-off valve at the rear of the last trailer. You should be sure the converter dolly air tank . 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. B Charge the system and pump the brakes with the window down. Trucks with trailers have a dangerous crack-the-whip effect. Open, free on kingpin. The lighter trailer should be in the rear. 0000006195 00000 n D It is important to check the height of the trailer before connecting a converter dolly to a trailer. How To Use Cruise Control Effectively As A Truck Driver. A When you're trying to correct a drive-wheel braking skid why should you stop braking? You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. should remain in the closed position. D Open the shut-off valves at the rear of the last trailer and listen for air flow. 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. (done) Chp 23: Cash Flow + Working Capital, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. coupled to the rear of a tractor-trailer combination forming a double bottom rig, A coupling device of one or two axles and a sixth wheel by which a semitrailer can be B. use only the trailer brakes Provides a snug fit to eliminate unwanted seepage of air or water. fumoto drain valve. _______ should be tested with the hand valve but controlled in normal operation with the foot pedal. Trailer Air Tanks And Shutoff Valves - Page 50. Seriously! 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. which of these statements about the handling of doubles and triples is true ? "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. 0000005733 00000 n

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