the converter dolly air tank drain valve should be

What three methods can you use to secure a second trailer before coupling? The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. Pull gently against the pin of the second trailer. You should keep at least ____ seconds of space ahead of you. If this lamp is illuminated and does not go out, You must treat a flashing red signal as you would treat a STOP sign. Open, latched New! Like a trailer, a dolly equipped with ABS will have a yellow indicator light on the left side. B. the emergency line valve open and release air Provides a snug fit to eliminate unwanted seepage of air or water. Leave the emergency line shut-off valve closed and open the service line valve. Check them all. Clean the couplers and rubber seals before a connection is made. 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. Older trailers do not have spring brakes. 0000005554 00000 n The rear trailer of a double The road is dry and the visibility is good. Allow more following distance. 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. 0000001162 00000 n When uncoupling doubles or triples, what is important to know about unlocking the pintle hook? unsafe slow down even further, or better yet, find a safe haven and park until the Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. which of these statements about managing space to the sides is true? Should I Be A Truck Driver? HlTo xGf`{iIMh-x||?pbE':X4ZZZRbu7 uvi_RHUkVXBVu{^B3 4e/iw\]RE] YY7i)e V*h(++WQ-]Xm9c5yU6BS" 5HiL,[b)ee:t/ )%BVGpU7T\ZJD axle will have spring brakes due to the weight of the unit. When you're finished, check your score and results. A None of the above, 2. 5. The dolly tow bar may fly up, possibly causing injury, and making it very difficult to Air flows steadily and isentropically through a passage. C. use controlled or stab braking, The best way to stop any skid is to: The emergency brakes come on whenever air pressure in the emergency line is lost. You will speak with recruiters today. A. require shorter stopping distances than full ones A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. The last trailer in a combination is most likely to turn over. S-cam brakes are the most common style brakes on large trucks today. You may be timed. 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. 0000003240 00000 n Any time you have to Sometimes, metal tags are attached to the lines with the words service and emergency stamped on them. On a triple combination, the shutoff valves at the rear off the middle trailer should be? The converter dolly is an auxiliary axle with a coupling device. When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. How can you be sure you supplied air to a second trailer? Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. A 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? 1/4 in. Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. What's a converter dolly? 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. Pintle hook latched. For emergency braking you should: May have poor traction due to bouncing and wheels lockup. B. open; latched You should keep at least ____ seconds of space ahead of you. When connecting two trailers the converter dolly is connected to the rear trailer first. When checking your air lines, they must be secure and? When coupling twin trailers, a converter dolly is. It is important to check the height of the trailer before connecting a converter dolly to a trailer. Becoming A Truck Driver is a dream we've all pondered at some point in our lives. Please visit using a browser with javascript enabled. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space They are filled by the emergency (supply) line from the tractor. Doubles and triples are more likely to turn over than other combination vehicles because of the "crack-the-whip" effect. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. To check if the converter dolly is securely coupled to the rear trailer you should: Pull gently against the pin of the second trailer. There is more chance for skids and loss of traction. Some do. Doubles/triples flip flop over from quick steering moves more easily than many vehicles. Make sure pintle hook is latched. On a triple combination, the shutoff valves on the rear of the last trailer should be? Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. Each trailer and converter dolly has one or more air tanks. When entering a roundabout, a driver must yield the right-of-way to drivers already in the roundabout and obey all traffic signs. You should keep at least ____ seconds of space ahead of you. first check for battery voltage to the valve by probing the wires of the electrical connector with a volt-meter it should be about 10.5 volts if not it's probably bad.next remove the valve. High Road 2.0! Doubles and triples must be driven very smoothly to avoid rollover or jackknife. Air escape from the open valve you should avoid traveling next to others when possible. A. closed; latched The lighter trailer should be in the rear. You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. Visually check to make sure that the lead trailer is slightly higher than the center of The road is dry and the visibility is good. 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. A. B D When checking the coupling system, make sure that the locking jaws are around the shank of the. C While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. Which of these are the correct positions for shut-off valves in doubles and triples? 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. 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. It's a fifth wheel, not a sixth wheel. 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. B The crack the whip effect that troubles trucks with trailers. They provide the air pressure used to operate trailer brakes. Often do not have spring brakes A The total number of questions. door. 7.3 Inspecting Doubles and Triples = Additional Things to Check During a Walkaround Inspection. Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver. Delivering to. 12, 3. A Their drawbars differentiate them. It is important not to let water and oil build up in the air tanks. A 360 degree area of awareness is All of the above, 6. B. are the easiest to stop since there is no shifting cargo What value of channel width must the design use? Only a certified diesel mechanic can check this. B Air pressure is sent from the air tanks to the brakes by relay valves. How many different ways of coupling and uncoupling trailer combinations are there? 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. Ship to Store. Should the shut-off valves on the trailers be open or closed on a set of double trailers? The pintle hook should always be secure when the vehicle is in motion. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. 60607. D You must steer gently when pulling trailers. This has the same value as the %%TIME_USED%% Variable on the Final Screen. A good and safe driver will always look out for ______. rear trailer. A. air escape from the open valve If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? You open the emergency line shut-off valve at the rear of the last trailer and hear air escaping. When you do this, you should hear: you are driving with double trailer and must use your brakes to avoid a crash. retrovirus $_____________________________$. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. 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 Remember however, that is just a suggestion. Be certain you are clear at the sides before changing lanes. C. fully raised, Which of these statements about speed management and braking is true? B. you need about four times as much stopping distance at 40 mph as at 20 mph What do you check when making a visual check of coupling? The Verge logo. There is no obligation whatsoever. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. C. if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right may still be best, To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: A fifth wheel, so trailer is raised slightly when dolly is pushed under it. Which the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. Open, free d. protein. not have spring brakes. 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. Converter dolly air tank drain valve: CLOSED. The dolly will have a yellow lamp on the drivers (left) side. will have a lamp on the drivers side. Open the emergency line shut-off valve at the rear of the last trailer. To prevent trailers from rolling over, you must steer gently and go slowly around corners, on ramps, off ramps and curves. 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. B. do not need to be checked as often as flat mirrors because they show a larger area Air will not be available to release the trailer spring brakes (parking brakes). 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. Once you are finished, click the button below. Never unlock the pintle hook with the dolly still under the rear trailer. Study section 6.2 if you can't answer all of these questions. Each trailer and converter dolly has one or more air tanks. 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. Visually check to make sure that the rear trailer is slightly lower than the center of the The trailer is at the correct height when. The coupling between a rear trailer and a dolly should have a space between the upper and lower fifth wheels of? 3. None What three methods can you use to secure a second trailer before coupling? You should be sure the converter dolly air tank drain . What happens if you cross the Emergency Air Line and the Service Air Line? Use the engine brake or speed retarder. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? The pintle hook? Make sure you do not get in a spot you cannot pull straight through. converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can the rig will continue moving in a straight line no matter how much the steering wheel is turned. A truckers workspace is a small moving office Read More. If it goes low enough, the trailer emergency brakes will come on. 9. Park on level ground, put chock on the tires, and charge the air tank. a. blood Each tank has a drain valve on it, and you should drain each tank every day. (done) Chp 23: Cash Flow + Working Capital, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Trailer Air Tanks And Shutoff Valves - Page 50. The driver will be required to complete this requirement in three eight hour shifts. By clicking on "Sign Up", you agree to our Terms of Use and Privacy Policy. 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 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 _______. Do converter dollies have spring brakes? The road is dry and visibility is good. These valves permit closing the air lines off when another trailer is not being towed. King pin. 7. Make a sketch that explains this phenomenon in terms of a feedback loop . What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? 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; . Any single vehicle with a GVWR of 26,001 or more pounds, or any such vehicle towing another not in excess of 10,000 pounds. If you feel There is no obligation whatsoever. At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. you should keep atleast __seconds of space ahead of you. You should check the height of the trailer before connecting a converter dolly to a second or third trailer. The crack the whip effect will topple the rear trailer first. You must stop, yield to traffic and pedestrians, and only proceed when safe. If the dolly is a two axle unit then 1 They are not only longer, but also need more space because they cannot be turned or stopped suddenly. 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, enclose converter dolly air tank drain valves 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. Take special care when pulling two and three trailers. [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]. C. the service brakes slowly move to the fully applied position, Some large trucks have converted or "spot" mirrors. Definition. Some areas of concern are discussed below. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. 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 If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. When does the Driver's manual say you should disable the steering axle brake? True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. Watch the wording of the question AND the answers A safe driver will look for all of the above. 2. Correct answer percentage. View the full article to see how to set cruise control correctly! you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. Go to the rear of the rig. The shortest trailer The emergency brakes come on whenever the air supply knob is pulled out or the trailer is disconnected. 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. utilize the brakes. A) one inch of space . You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. What is a converter dolly? _______ should be tested with the hand valve but controlled in normal operation with the foot pedal. You can find it here: High Road 2.0. A green traffic light allows the driver to go. Some vehicles have dead end or dummy couplers to which the hoses may be attached when they are not in use. C These mirrors: make things seem smaller & further away then they really are. 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. how can you be sure you supplied air to a second trailer? Open the shut-off valves at the rear of the last trailer and listen for air flow. which of these is not a good thing to do when driving on slippery roads? open, closed, closed: Term. 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. A. always keep your vehicle to the right side of your lane Why should you not use the trailer hand valve while driving? When the road is dry Compressed air usually has some water and some compressor oil in it. A. open This will supply air to the emergency (supply) lines. These dollies will have a yellow lamp on the left side of the dolly. Always unlock the pintle hook with the dolly still under the rear trailer. The road is dry and visibility is good. The shut off valves, when in the open position, allows air to flow out to another trailer. A 0000006383 00000 n 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. The rear trailers shut-off valves should be closed and the front open. 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 _____. For emergency braking you should: You are doing a walk around inspection of a double or triple trailer rig. 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. You will speak with recruiters today. 0000009577 00000 n That there is some space between the upper and lower fifth wheel. 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 B. allow one vehicle length for every 10,000 lbs of gross vehicle weight Take special care when pulling two and three trailers. Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? You should not hear air escaping. The number of correct answers. You are driving a 100-feet truck with double trailers at 50 mph. Number of wrong answers. Which of these is most likely too occur? mTouch Quiz will automatically populate the fields below. Ideal for replacing a worn, leaky drain valve on a compressor. Unlock the pintle hook only if the trailer it is under is loaded, otherwise the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. B. restore traction to the tires What is one function of the tractor protection valve? A. countersteer 4. Select the answer that correctly completes each statement. All ABS equipped units What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly? The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. 0000001956 00000 n 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. With the red knob pushed in on the tractor dash, the service line should have air in it. 11 A-dolly. This has the same value as the %%SCORE%% Variable on the Final Screen. What is the most common foundation brake found on heavy vehicles? 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. 0000007487 00000 n In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. They are filled by the emergency (supply) line from the tractor. B. for doubles and triples, the fifth wheel should be all the way towards the tractor 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. You are driving a 100 foot twin trailer combination at 50 mph. Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. Air pressure is sent from the air tanks to the brakes by relay valves. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. Should the converter dolly air-tank drain valve be open or closed on a double trailer combination? When coupling, be sure to couple the proper glad hands together. The shut off valves prevent air from going any further. If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). Question 3 Explanation: All of the above. When driving with more than one trailer, which trailer should be the first one behind the tractor? - Converter dolly air tank drain valve: CLOSED. 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The couplers have a rubber seal that prevents air from escaping. What should you check for when inspecting the converter dolly and the pintle hook? When connecting the glad hands, press the two seals together with the couplers at a 90-degree angle to each other. These mirrors: Make things seem smaller and further away than they really are. D Make sure the converter dolly air tank drain valve is closed. For emergency braking you should: which of these statements about emergency steering is true? D with the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. 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). The heavier trailer should be in the rear. what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? In order to receive your Doubles and Triples endorsement, it is required that you pass the states official CDL written Knowledge exam. 0000010306 00000 n Should the shut-off valves on the rear of the last trailer be open or closed? A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. A Light cords firmly in sockets on trailer. We are here to help. when does the drivers manual say you should disable the steering axle brakes? Also available in App Store & Google Play. You can also reach us at (888) 830-2326. 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. Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. CDL License Requirements State By State. How much space should be between the upper and lower fifth wheels? You should NOT: 5. 2) the second test is to go out to the trailer to ensure that the parking brakes have indeed applied. 3. 0000003261 00000 n When the road is slippery Ensuring the safety of the public starts with a thorough If you crossed the air lines, you could drive away, but you would not have trailer brakes. Make sure you have large enough gaps before entering or crossing traffic. All trademarks are property of their respective owners. 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. The rear trailer does not have shut-off valves. Submit your email at the end of the test. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. Therefore, look far ahead so you can slow down or change lanes gradually when necessary. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. 9 Be more careful in adverse conditions. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? When you do this, you should hear: To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and We'll help you make the right choices and prepare for a great start to your trucking career. Converter dollies: While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. Each trailer and converter dolly has one or more air tanks. C Make sure to visually inspect the fifth wheel and that the locking mechanism is

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