0000001956 00000 n A dolly should be pulled out from a rear trailer using? At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. 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? doubles/triples flip flop over from quick steering movements more easily than many other vehicles. You should hear air escaping, showing the entire system is charged. A. fully lowered There is more chance for skids and loss of traction. 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. A thorough pre-trip inspection should catch any major service line leaks before you begin your trip. 0000010306 00000 n The road is dry and visibility is good. 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. Which of the following will occur? Make sure to visually inspect the fifth wheel and that the locking mechanism is However there are some states that allow doubles that are each 48 feet in length. converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can TestPermit.com provides free unofficial review materials for a variety of exams. This will supply air to the emergency (supply) lines. True! This has the same value as the %%SCORE%% Variable on the Final Screen. Air will not be available to release the trailer spring brakes (parking brakes). The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. B None of the above, 2. The converter dolly air tank drain valve on coupled double and triple trailers should be: A. open B. closed C. partially opened B When inspecting coupled doubles and triples, make sure the pintle hooks are: A. secured to the safety pins B. in the open position C. latched C Which of these is true? True! Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. Time allowed (Requires timer add on). When coupling twin trailers, a converter dolly is. A. use a low gear How do you know if your converter dolly is equipped with antilock brakes? you want to hook your combination to a second trailer that has no spring brakes. 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 normal operation, trailer service brakes should be operated by? How do you know if your converter dolly is equipped with antilock brakes? 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. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. rear trailer. 8. and ensuring it is secure. The A-dolly has a single drawbar with a single, centered hitching point. The topics with which you will want to be expertly familiar are: There isnt as much information to be studied in the classroom or in the CDL manual regarding doubles and triples, so in-lot and on-the-road practice will help you pass this test. Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? 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. NPT thumbscrew style design enables easy installation. What three methods can you use to secure a second trailer before coupling? To do this without wheels chocks you should: Supply air to the trailer air system with the tractor and then disconnect the emergency line. You should keep at least _____ seconds of space ahead of you. Once that's complete, then its an easy push back and the 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. with the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. A Open, latched B Open, free C Closed, latched D Closed, free 28. A truckers workspace is a small moving office Read More. When you're trying to correct a drive-wheel braking skid why should you stop braking? When connecting a converter dolly to a rear trailer, the trailer height must be adjusted so that it is? fifth wheel, so trailer is raised slightly when dolly is pushed under it. Pickup at South Loop. Ship to Store. The last trailer in a combination is most likely to turn over. 0000009556 00000 n What happens if you cross the Emergency Air Line and the Service Air Line? 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. Delivering to. Why is there still destructive interference? A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. C. closed; unlatched, Which of these will result in the best control on a curve? Follow the procedures described later in this section. If spare tire is on converter gear (dolly), make sure it is secured. Hit the article below to see specific information about AOBRDs! Sketch the shape of the passage between sections 1 and 2. A turn of the glad hand attached to the hose will join and lock the couplers. 2) the second test is to go out to the trailer to ensure that the parking brakes have indeed applied. You open the emergency line shut-off valve at the rear of the last trailer and hear air escaping. Air escape from the open valve locked . Which is most likely to tip over: A 9 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: 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; . How can you test that air flows to all trailers? This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. You are driving a tractor with multiple trailers. 0000003977 00000 n cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. Should the converter dolly air-tank drain valve be open or closed on a double trailer combination? rear brakes will not work properly. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. This will prevent water and dirt from getting into the coupler and the air lines. The air lines will rupture The Verge logo. 0000008166 00000 n 1 Terms in this set (43) Converter dollies are used to connect: A tractor-trailer combination to another trailer. A. air escape from the open valve They provide the air pressure used to operate trailer brakes. To prevent trailers from rolling over, you must steer gently and go slowly around corners, on ramps, off ramps and curves. Study section 6.2 if you can't answer all of these questions. Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. D recouple. You are driving a 100-feet truck with double trailers at 30 mph. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. 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. when testing the coupling of a double trailer the landing gears of the rear trailer should be, you must drive through deep or flowing water . 7. Blue is used for the service lines, and red for the emergency (supply) lines. 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? B. open; latched That there is some space between the upper and lower fifth wheel. When checking the coupling system, make sure that the locking jaws are around the shank of the. Converter dollies: When uncoupling doubles or triples, what is important to know about unlocking the pintle hook? B. do not need to be checked as often as flat mirrors because they show a larger area axle will have spring brakes due to the weight of the unit. A bent or damaged kingpin on a coupling should be? These mirrors: make things seem smaller & further away then they really are. Any items you have not completed will be marked incorrect. safe speed would be 40 MPH. Hb```f``b`c``e@ (Q6_* Compressed air usually has some water and some compressor oil in it. When checking the fifth wheel, you should make sure that it has enough? What's a converter dolly? retrovirus $_____________________________$. 3. The rear trailers shut-off valves should be closed and the front open. 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? Air pressure is sent from the air tanks to the brakes by relay valves. Make sure you do not get in a spot you cannot pull straight through. In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. You are driving a triple trailer and there is a loss of air pressure in the emergency line. you should check the trailer height before connecting a converter dolly to a second or third trailer. The emergency brakes come on whenever the air supply knob is pulled out or the trailer is disconnected. 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: Doubles and triples are extremely prone to control issues and must be B. keep gentle pressure on the brakes while going through the water and for a short distance after coming out The road is dry and visibility is good. 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. If the fifth wheel on a coupling is too far forward, the tractor frame may hit? 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. It is important to check the height of the trailer before connecting a converter dolly to a trailer. When you're finished, check your score and results. [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]. - Converter dolly air tank drain valve: CLOSED. Never pull any trailer without visually inspecting the fifth wheel locking bar You should be sure the converter dolly air tank drain . If the spring brakes do not release when you push the trailer air supply control, check the air line connections. Do converter dollies have spring brakes? 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 Converter dolly air tank drain valve: CLOSED. 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. New! C. posted speed limits on curves are safe for all trucks, Empty trucks: The rear trailer does not have shut-off valves. 0000001375 00000 n 0000004668 00000 n When driving with more than one trailer, which trailer should be the first one behind the tractor? You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. Some do. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? The road is dry and visibility is good. You should avoid traveling next to others when possible. C. slow to a safe speed before entering the curve, then coast through it, Which of these is NOT a good thing to do when driving on slippery roads? Wait for air pressure to reach normal, then push in the red trailer air supply knob. When you do this, you should hear: When uncoupling a rear trailer, you should remove some weight from the dolly by? B. pull gently against the pin of the second semitrailer Each trailer and converter dolly has one or more air tanks. 0000001354 00000 n Locking jaws closed on 1. What should you check for when inspecting the converter dolly? Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? You must steer gently when pulling trailers. A full trailer behind a truck It depends on the load Each trailer and converter dolly has one or more air tanks. D These valves permit closing the air lines off when another trailer is not being towed. On a triple combination, the shutoff valves at the rear off the middle trailer should be? Any trailer with a reduced ground clearance 3. Locking jaws closed on 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: What should you check for when inspecting the converter dolly and the pintle hook? you are visually checking the coupling of a converter dolly to the rear trailer. Push the brake pedal as hard as you can and hold it there Sometimes, metal tags are attached to the lines with the words service and emergency stamped on them. 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. B. you should avoid traveling next to others whenever possible 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. A converter gear or dolly is a coupling device of one or two axles and a fifth wheel by which a semi-trailer can be coupled to the rear of a tractor-trailer combination forming a double bottom. What is the most common foundation brake found on heavy vehicles? What is one function of the tractor protection valve? securely fastened. Converter dollies have spring brakes. 0000010705 00000 n C Please wait while the activity loads. Related Question Question: What does this sign mean? A. use light, steady pressure on the brake pedal Join 50,000+ users around America to get your Commercial Driver License today! With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. If there is a trailer ADVERTISEMENT ADVERTISEMENT Which diagram shows the best way to turn? The final procedure when connecting a rear trailer is to? All ABS equipped units Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? It's a fifth wheel, not a sixth wheel. 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 driving a truck with more than one trailer, which trailer should be first behind the truck? Tips for Backing Up a Trailer Like a Pro Trucker. Go to the rear of second trailer and open the emergency line shut-of valve. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. 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? The emergency brakes come on whenever air pressure in the emergency line is lost. Optional: Leave your email address if you would like a reply: When inspecting doubles or triples, in what position should the air shut-off valves be in? 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. 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. Any trailer, 7. C re-couple, You can if you want to, it does not matter. fumoto drain valve. 0000001162 00000 n 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. Time used (Requires timer add on). You MUST have air all the way to the back for all the brakes to work. A. require shorter stopping distances than full ones Air flows steadily and isentropically through a passage. B. slightly open Explore now! A green traffic light allows the driver to go. Stop the vehicle by gearing down and sparingly S-cam brakes are the most common style brakes on large trucks today. None of the above, 4. When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and The number and size of air tanks varies among vehicles. When checking your air lines, they must be secure and? Doubles and triples must be driven very smoothly to avoid rollover or jacknife. Take special care when pulling two and three trailers. Which of these is the correct answer? You must steer gently when pulling trailers. Open. In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. How do you check to make sure trailer height is correct before coupling? you should keep atleast __seconds of space ahead of you. Should I Be A Truck Driver? Charge the system and pump the brakes with the window down. You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. B D Which of the following must be connected when coupling tractor to trailer or trailer to trailer? coupled to the rear of a tractor-trailer combination forming a double bottom rig, Careful of the wording! A sudden movement with the steering wheel can result in a tipping over rear trailer. This means. The application only takes one minute. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? How can you test that air flows to all trailers? The pintle hook? A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. 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. air throughout the system. front of the second trailer. When only pulling one trailer, be sure the shut-off valves are all in the fully closed position. View More Details. While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. None of the above, 5. 12, 3. Question 4. A) one inch of space . These mirrors: Make things seem smaller and further away than they really are. After 15 years on the road I wanted to help people understand the trucking industry and everything that came with the career and lifestyle of an over the road trucker. In the coupling system, the locking jaws should be fixed around? 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. 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. A. opening the air tank petcock Becoming A Truck Driver is a dream we've all pondered at some point in our lives. C D You should keep at least ____ seconds of space ahead of you. 0000007032 00000 n Therefore, look far ahead so you can slow down or change lanes gradually when necessary. When driving a double or triple trailer, greater care must be given to. 3. Use the engine brake or speed retarder. 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. When connecting two trailers the converter dolly is connected to the rear trailer first. Try our free CDL Doubles and Triples Test Question and Answers Quiz online. It is very important to keep the air supply clean. Locking jaws closed on 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]. Make sure trailer height is correct. If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. Open the emergency line shut-off valve at the rear of the last trailer. Only trailers designed to be pulled with another trailer behind it will have a shut off valve. The rear trailer of a triple You are doing a walk around inspection of a double or triple trailer rig. Light cords firmly in sockets on trailer. Doubles and triples are more likely to turn over than other combination vehicles because of what effect? Go to Section 4: Other Topics This question is in Section 4: Other Topics of our CDL Test Guide. Clean the couplers and rubber seals before a connection is made. What is likely to happen? C. foot pedal, Which of these statements about managing space to the sides is true? the rig will continue moving in a straight line no matter how much the steering wheel is turned. A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. 60607. 10. The total number of questions. 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: Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. On the first trailer in a set of doubles? C. closed, You can release the dolly brakes by: 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. The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. Open, latched The shut off valves prevent air from going any further. These trailers have no parking brake. slow to safe speed before entering, then accelerate slightly through the curve. Doubles and triples must be driven very smoothly to avoid rollover or jackknife. Open King pin. D If not, there is a problem. D Flammable materials in the front trailer then it must have the placards on that trailer. Allow much more space than is needed for ideal driving condition. Converter dolly air tank drain valve: CLOSED. door. The rear trailers shut-off valves should be open and the front closed. 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. Slow to the safe speed before entering, then accelerate slightly through the curve. A converter dolly is still under the second trailer when you unlock the pintle hook. you are driving a 100ft truck eith double trailers at 50mph. Which of these is most likely to occur? 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? 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 _______. What do you check when making a visual check of coupling? During normal operation the brakes of the double/triple trailer are controlled by: You are driving at night and you must dim your headlights for traffic. We'll help you make the right choices and prepare for a great start to your trucking career. Like a trailer, a dolly equipped with ABS will have a yellow indicator light on the left side. If it goes low enough, the trailer emergency brakes will come on. Make sure you can hear air escaping with the valve closed. What types of trailers can get stuck on raised crossings? B. keep other traffic out of your side space A Single axle converter dollies are the most common type of converter dolly used in the U.S. C-dolly The C-dolly has two separate couplings, side-by-side. Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. d. protein. 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 should never take second place, so know your stuff! 0000003261 00000 n B. you need about four times as much stopping distance at 40 mph as at 20 mph 0000003240 00000 n 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. We are an independent company focused on providing valuable motor vehicle and permit practice test information. The lightest trailer Be certain you are clear at the sides before changing lanes. The trailer brakes will unlock 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. B. Ideal for replacing a worn, leaky drain valve on a compressor. 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 should you test the coupling? Definition. There are two types of converter dollies. what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer?
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