the converter dolly air tank drain valve should be

Air pressure is sent from the air tanks to the brakes by relay valves. 1 Should I Be A Truck Driver? Which is most likely to tip over: You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. The road is dry and visibility is good. The pressure in the service line is controlled by the brake pedal and the trailer hand brake. If you do, there is a problem. not have spring brakes. 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? Becoming A Truck Driver is a dream we've all pondered at some point in our lives. You must treat a flashing red signal as you would treat a STOP sign. You should NOT: Which of the following is true about loading cargo into double or triple trailers? You have not finished your quiz. Before coupling a trailer, you should make sure it is at the right height using? 5. The number of correct answers. you are driving a set of doubles and a set of trailer wheels goes in a skid. A Open, latched B Open, free C Closed, latched D Closed, free 28. Try our free CDL Doubles and Triples Test Question and Answers Quiz online. If there is Remember however, that is just a suggestion. How do you check to make sure the trailer height is correct before coupling? Never pull any trailer without visually inspecting the fifth wheel locking bar You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. 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. 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. B. johnson bar 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. B. you need about four times as much stopping distance at 40 mph as at 20 mph The A-dolly has a single drawbar with a single, centered hitching point. 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. The rear trailer does not have shut-off valves. When you do this, you should hear: When doing a walkaround inspection of a double or triple trailer, the shut-off valves should be _______ at the rear(s) of the front trailer(s) and ________ at the rear of the last trailer. Open you are driving a 100ft truck eith double trailers at 50mph. Use the engine brake or speed retarder. The road is dry and visibility is good. If you crossed the air lines, you could drive away, but you would not have trailer brakes. what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? 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. 1. 4. Which of the following must be connected when coupling tractor to trailer or trailer to trailer? What value of channel width must the design use? Hb```f``b`c``e@ (Q6_* 0000004689 00000 n Newer trailers have spring brakes just like trucks and truck tractors. Types of converter dollies. D If there is a trailer 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. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? That there is no space between upper and lower fifth wheel. If you leave this page, your progress will be lost. When driving a double or triple trailer, greater care must be given to. B. you should avoid traveling next to others whenever possible You are driving a triple trailer and there is a loss of air pressure in the emergency line. 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. 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. A The crack the whip effect that troubles trucks with trailers. C Some large trucks have curved (convex or spot) mirrors. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. Only trailers designed to be pulled with another trailer behind it will have a shut off valve. The application only takes one minute. You should keep at least ____ seconds of space ahead of you. Should the shut-off valves on the trailers be open or closed on a set of double trailers? In normal operation, trailer service brakes should be operated by? B. are the easiest to stop since there is no shifting cargo Use only the trailer brakes 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. use light, steady pressure on the brake pedal If your tractor protection valve doesn't work properly, then if an air hose starts to leak what could happen? A. fully lowered If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. 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. Any trailer with a reduced ground clearance How do you check to make sure trailer height is correct before coupling? Older trailers do not have spring brakes. A connection device of one axle used to disconnect a semitrailer combination vehicle A dolly is like a very short trailer, with a ring hitch on the front and a fifth wheel on top. For emergency braking you should: Doubles and triples are extremely prone to control issues and must be fumoto drain valve. Safety should never take second place, so know your stuff! %PDF-1.2 % B 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. When the road is dry You can find it here: High Road 2.0. Also, this page requires javascript. 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. Slow to a safe speed before entering the curve, then coast through the curve. Each tank has a drain valve on it, and you should drain each tank every day. Terms in this set (43) Converter dollies are used to connect: A tractor-trailer combination to another trailer. 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. The lighter semitrailer should be in first position behind the tractor. Always test the trailer brakes before driving with the hand valve or by pulling the air supply (tractor protection valve) control. This has the same value as the %%WRONG_ANSWERS%% Variable on the Final Screen. 60607. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. You are doing a walk around inspection of a double or triple trailer rig. A. for coupled doubles and triples, be sure that the pintle hook is in the open position True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. Be sure air-lines are supported and glad hands are properly connected. B You are driving with double trailers and must use your brakes to avoid a crash. The heaviest trailer the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. 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. B. slightly open Which of these is NOT a good thing to do when driving on slippery roads? Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. Delivering to. Open. 0000008894 00000 n Hook dolly to front trailer. Dont hesitate to take advantage of our practice tests in each category specific to your needs. Time used (Requires timer add on). What does the drivers manual say about how much space you should keep ahead of your truck? 1/4 in. Trucks with trailers have a dangerous crack-the-whip effect. B. allow one vehicle length for every 10,000 lbs of gross vehicle weight 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. 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. The dolly tow bar may fly up, possibly causing injury, and making it very difficult to you should avoid traveling next to others when possible. . Hit the article to see the way to back up your trailer like a pro! locked . A A. make things look smaller and farther away than they really are The converter dolly air tank drain valve on coupled double/triple trailers should be: Closed. some large trucks have curved (convex or spot) mirrors. 0000001162 00000 n A bent or damaged kingpin on a coupling should be? 0000010285 00000 n B. keep gentle pressure on the brakes while going through the water and for a short distance after coming out 0000003977 00000 n At section 2 downstream, the speed is 519 m/s. 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 want to lock your combination to a second trailer that has no spring brakes. When driving a truck with more than one trailer, which trailer should be first behind the truck? 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. Which of these statements about quick steering movements and doubles/triples is true? Why should you use chocks when parking a trailer without spring brakes? mTouch Quiz will automatically populate the fields below. driven with care to avoid losing control, Make sure the spare tire is secured, if it has one, Make sure the converter dolly air tank drain valve is closed, Make sure safety chains are secured to the trailers, All of the above. Safety fail-safe features of a tractor-trailer converter dolly. Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. 0000007508 00000 n Which of these statements about managing space to the sides is true? Have little braking power because they are small Pull gently against the pin of the second trailer. the fifth wheel, so trailer is raised slightly when dolly is pushed under it. Converter dolly air tank drain valve: CLOSED. The pintle hook should always be secure when the vehicle is in motion. 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? C You should be sure the converter dolly air tank drain valves are _______ & the pintle hook is __________. Air escape from the open valve B The service brakes slowly move to the fully applied position C The emergency line valve open and release air D None of the above 4. A. The number and size of air tanks varies among vehicles. They provide the air pressure used to operate trailer brakes. Closed, free, 8. NPT thumbscrew style design enables easy installation. Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. 10. 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: 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? to re-capture it. What should you check for when inspecting the converter dolly? 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. Lock pintle hook. Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? Open, latched Which f these will result in the best control on curves? The road is dry and visibility is good. If not, there is a problem. A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. The rear trailer of a triple You are doing a walk around inspection of a double or triple trailer rig. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space C. use stab or controlled braking, Which of these is true? D You MUST have air all the way to the back for all the brakes to work. When does the "driver's manual" advise disconnecting the steering axle brakes to help You are driving with double trailers and must use your brakes to avoid a crash. rear brakes will not work properly. 0000010306 00000 n The dolly tow bar may fly away, possibly causing panic, and making it very difficult The Verge logo. Watch the wording of the question AND the answers A safe driver will look for all of the above. A 0000001107 00000 n What types of trailers can get stuck on raised crossings? 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. 1/2 to 3/4 of an inch Opening the shut off valves on the rear most trailer will ensure the lines are flowing Air flows steadily and isentropically through a passage. The dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. These valves permit closing the air lines off when another trailer is not being towed. B. slightly raised unsafe slow down even further, or better yet, find a safe haven and park until the 3. A sudden movement with the steering wheel can result in a tipping over rear trailer. When testing trailer service brakes, you should use? You should check the height of the trailer before connecting a converter dolly to a second or third trailer. B Safety chains secured to trailer (s). you want to hook your combination to a second trailer that has no spring brakes. Never, 9. Ship to Store. symptoms of a bad fuel tank selector switch. Blue is used for the service lines, and red for the emergency (supply) lines. 2. How many different ways of coupling and uncoupling trailer combinations are there? Follow the procedures described later in this section. inspection of all equipment. You wish to turn right from one two-lane, two-way street to another. King pin. 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 Sketch the shape of the passage between sections 1 and 2. What is likely to happen? 11 2 What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. [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]. ADVERTISEMENT ADVERTISEMENT Locking jaws closed on If the converter dolly is close to your semitrailer, you should wheel it into position? The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. They are filled by the emergency (supply) line from the tractor. Correct answer percentage. Why is there still destructive interference? Use controlled or stab braking If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen? 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? C. engaging the tractor valve protection control, You must drive through deep or flowing water. 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. A vehicle transporting hazardous materials is required to display placards where? 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 this lamp is illuminated and does not go out, The final procedure when connecting a rear trailer is to? You should keep at least ____ seconds of space ahead of you. To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: Closed. You will have greater length and more dead axles to pull with your drive axles than other drivers. Closed, latched [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. 0000005554 00000 n you should keep atleast __seconds of space ahead of you. 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). Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). The converter dolly is an auxiliary axle with a coupling device. Take special care when pulling two and three trailers. Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! Trailer Air Tanks And Shutoff Valves - Page 50. Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? A The pressure in the service line tells how much pressure the relay valves should send to the trailer brakes. The road is dry, and visibility is good. The last trailer in a combination is most likely to turn over. Related Question Question: What does this sign mean? You should keep at least _____ seconds of space ahead of you. Contributor: Luke Nold (Experienced truck driver for 5+ years and published writer for Fleet Magazine). 27. B. which of these statements about quick steering movements and doubles/triples is true? 0000010783 00000 n Good speed management says you should: You must drive through deep or flowing water. Should the shut-off valves on the rear of the last trailer be open or closed? 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. axle will have spring brakes due to the weight of the unit. 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. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. You need to brake in order to regain control. Any items you have not completed will be marked incorrect. 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 Each trailer and converter dolly has one or more air tanks. When checking the fifth wheel, you should make sure that it has enough? When uncoupling a rear trailer, your rig should be parked in a straight line on? If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? Air will not be available to release the trailer spring brakes (parking brakes). If it goes low enough, the trailer emergency brakes will come on. Converter dollies are connected to front trailers with a? Make sure you have large enough gaps before entering or crossing traffic. 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. Explore now! The dolly tow bar may flip up causing bodily injury and making it very difficult to Any trailer, 7. 3. You should not hear air escaping. when does the drivers manual say you should disable the steering axle brakes? 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. Select the answer that correctly completes each statement. A thorough pre-trip inspection should catch any major service line leaks before you begin your trip. There is no requirement or exact standard for color coding. You must steer gently when pulling trailers. When you're finished, check your score and results. Disconnect the glad-hand at the front of the first trailer and listen for air flow. the rig will continue moving in a straight line no matter how much the steering wheel is turned. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. Slow to the safe speed before entering, then accelerate slightly through the curve. should remain in the closed position. 0000006195 00000 n Hit the article below to see specific information about AOBRDs! You must steer gently when pulling trailers. 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. allow "much more space than is needed for ideal driving conditions". C A green traffic light allows the driver to go. Because of this, which of the following vehicle parts is most likely to tip over? A. brake and downshift in a curve You should be sure the converter dolly air tank . A) closed . The road is dry and visibility is good. Simply click in your answer to each CDL practice test question. For emergency braking you should: which of these statements about emergency steering is true? B. pull gently against the pin of the second semitrailer Those that do not have spring brakes have emergency brakes that work from the air stored in the trailer air tank. Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. A. always keep your vehicle to the right side of your lane If your tanks have automatic drains, they will keep most moisture out, but you should still open the drains to make sure. good speed management says you should, may have poor traction due to bouncing and wheel lock up. 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? Which of these are the correct positions for shut-off valves in doubles and triples? For all brakes to work on a triple combination, you must have air supply? There is no obligation whatsoever. B. closed Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. Allow much more space than is needed for ideal driving condition. What three methods can you use to secure a second trailer before coupling? Which of these is most likely too occur? Each trailer and converter dolly has one or more air tanks. There are more critical parts to check when you have two or three trailers. B True! At section 1, where the cross-sectional area is 0.02 m2m^{2}m2, the air is at 40.0 kPa (abs), 60C60^{\circ} \mathrm{C}60C, and M=2.0. Open the emergency line shut-off valve at the rear of the last trailer. Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. A turn of the glad hand attached to the hose will join and lock the couplers. 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. What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly? Speed for other vehicles is often too fast for a multi-combination unit! rear trailer. 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 _____. The word part ferrit- means: 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? A. air escape from the open valve 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? To check air flows to all trailers, you should let air pressure reach normal then? These dollies will have a yellow lamp on the left side of the dolly. Provides a snug fit to eliminate unwanted seepage of air or water. Go to the rear of the rig. CDL License Requirements State By State. 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 _______. B C These mirrors: Typically depends on the axle count. you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. Question 3 Explanation: All of the above. Calculate the Mach number at section 2. Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. coupled to the rear of a tractor-trailer combination forming a double bottom rig, Careful of the wording! you are driving at night and you must dim your headlights for traffic. With the red knob pushed in on the tractor dash, the service line should have air in it. Converter dolly air tank drain valve: CLOSED. Air Storage and Drain Tanks: Air storage tanks are used to hold compressed air. D 0000001956 00000 n The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. Which of these is most likely to occur? You are driving with double trailers and must use your brakes to avoid a crash. Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? A converter dolly is still under the second trailer when you unlock the pintle hook. That there is some space between the upper and lower fifth wheel. Once you have coupled your rear trailer, you should test the coupling by? A Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. You are doing a walkaround inspection of a double or triple trailer rig. 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested A. hand valve

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