A good and safe driver will always look out for ______. The driver will be required to complete this requirement in three eight hour shifts. Opening the shut off valves on the rear most trailer will ensure the lines are flowing [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]. Your vehicle is so long that you must swing wide to make the turn. 1/2 to 3/4 of an inch Sketch the shape of the passage between sections 1 and 2. Open, latched They are filled by the emergency (supply) line from the tractor. Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). Open the emergency line shut-off valve at the rear of the last trailer. A. for coupled doubles and triples, be sure that the pintle hook is in the open position You should keep at least ____ seconds of space ahead of you. 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? can and will get stuck on a raised railroad crossing. What is a converter dolly? When you do this, you should hear: Locking jaws closed on A While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. Never, 9. You are driving a 100-feet truck with double trailers at 30 mph. Pull gently against them in a low gear to make sure the brakes work. When connecting two trailers the converter dolly is connected to the rear trailer first. Which is most likely to tip over: 0000010705 00000 n 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. A. Open the emergency line shut-off valve at the rear of the last trailer. you should check the trailer height before connecting a converter dolly to a second or third trailer. The Verge logo. Hazardous materials must be placarded on all four sides of EACH Trailer. the trailer will be raised slightly when the converter dolly is backed under it 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. 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. 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. Seriously! 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 low air buzzer will go off indicating something is wrong and either the front or the A What three methods can you use to secure a second trailer before coupling? Converter dolly air tank drain valve: CLOSED. The A-dolly has a single drawbar with a single, centered hitching point. 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 can you be sure you supplied air to a second trailer? The lighter semitrailer should be in first position behind the tractor. B. slow to a safe speed before entering the curve, then accelerate slightly through it Slow to the safe speed before entering, then accelerate slightly through the curve. Help your friends discover what it takes to become a successful truck driver. A B. slightly raised . Park the rear trailer against another trailer, chock the tires and lock the trailer D 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 When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? If the dolly is a two axle unit then 1 These dollies will have a yellow lamp on the left side of the dolly Questions You Should Know For Doubles And Triples 1. How do you check to make sure trailer height is correct before coupling? If it goes low enough, the trailer emergency brakes will come on. 4. Because of this, which of the following vehicle parts is most likely to tip over? 1/32 to 3/32 of an inch. A. brake and downshift in a curve A truckers workspace is a small moving office Read More. 1 If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. If spare tire is carried on converter gear (dolly), make sure it's secured. converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can The service brakes slowly move to the fully applied position 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. D A What three methods can you use to secure a second trailer before coupling? When checking the fifth wheel, you should make sure that it has enough? Go to the rear of the rig. Ensuring the safety of the public starts with a thorough inspection of all equipment. D the rig will continue moving in a straight line no matter how much the steering wheel is turned. None of the above, 2. Doubles and triples are extremely prone to control issues and must be True or False? 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. 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. What is the most common foundation brake found on heavy vehicles? For emergency braking you should: which of these statements about emergency steering is true? The word part ferrit- means: On the middle trailer of a set of triples? weather passes. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. NPT thumbscrew style design enables easy installation. Hook dolly to front trailer. allow "much more space than is needed for ideal driving conditions". We'll help you make the right choices and prepare for a great start to your trucking career. You can test that air is flowing to all trailers by opening? The road is dry and visibility is good. Allow much more space than is needed for ideal driving condition. When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. Never pull any trailer without visually inspecting the fifth wheel locking bar We are here to help. The road is dry and the visibility is good. What do you check when making a visual check of coupling? C 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. which of these is not a good thing to do when driving on slippery roads? View More Details. That split second that you release the brakes will allow them to match the vehicles road A. air escape from the open valve Converter dollies have spring brakes. True! The Doubles and Triples written CDL Exam is required for your doubles and triples endorsement. What will happen if there is a major leak in the service air line? C B. keep other traffic out of your side space 0000002636 00000 n 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. Follow the procedures described later in this section. A converter dolly is If a converter dolly has spring brakes, you release the brakes by You have connected the converter dolly to the front semitrailer and then connected the rear semitrailer to the converter dolly. 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. 2003-2023 Chegg Inc. All rights reserved. You should keep at least ____ seconds of space ahead of you. speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. the fifth wheel, so trailer is raised slightly when dolly is pushed under it. 8. 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.
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the converter dolly air tank drain valve should be