the converter dolly air tank drain valve should be the converter dolly air tank drain valve should be

C. fully raised, Which of these statements about speed management and braking is true? In order to receive your Doubles and Triples endorsement, it is required that you pass the states official CDL written Knowledge exam. That there is no space between upper and lower fifth wheel. A 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. Once that's complete, then its an easy push back and the If it goes low enough, the trailer emergency brakes will come on. Refers to pulling two trailers at the same time, otherwise known as "pups" or "pup trailers" because they're only about 28 feet long. A) one inch of space . The road is dry and the visibility is good. You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. If you do cross the air lines, supply air will be sent to the service line instead of going to charge the trailer air tanks. D The lighter semitrailer should be in first position behind the tractor. 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. recouple. Safety should never take second place, so know your stuff! In this order, the shutoff valves at the rear of front trailers, the rear of the last trailer and the converter dolly air tank drain valve should be? 0000003060 00000 n The emergency line valve open and release air B. allow one vehicle length for every 10,000 lbs of gross vehicle weight You should not hear air escaping. Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. You should avoid traveling next to others when possible. Open. This will let the rear wheels roll again and keep the rear wheels from sliding. When uncoupling a rear trailer, you should remove some weight from the dolly by? 0000001107 00000 n In normal operation, trailer service brakes should be operated by? In double and triple trailers, the trailer air supply control should pop or _________ when air pressure drops into the range of 20 to 45 psi. The trailer is at the correct height when. When you do this, you should hear: Which of these statements about emergency steering is true? Submit your email at the end of the test. Air escape from the open valve When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. The pressure in the service line is controlled by the brake pedal and the trailer hand brake. - Converter dolly air tank drain valve: CLOSED. Dont hesitate to take advantage of our practice tests in each category specific to your needs. 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 . 0000003240 00000 n Any trailer with a reduced ground clearance 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? Always unlock the pintle hook with the dolly still under the rear trailer. The word part ferrit- means: Describe what the trailer air supply control does. Open the shut-off valves at the rear of the last trailer and listen for air flow. If you are driving a 200-foot triple at 35 mph, what is the minimum amount of space (in seconds) that you should keep ahead of you? What should you check for when inspecting a converter dolly? The application only takes one minute. B How much space should be between the upper and lower fifth wheels? during normal operation the brakes of the double/triple trailer are controlled by : which of these will result in the best control on curves? What should you check for when inspecting the converter dolly and the pintle hook? Which of these are the correct positions for shut-off valves in doubles and triples? That there is some space between the upper and lower fifth wheel. 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: Never, 9. When connecting a converter dolly to a rear trailer, the trailer height must be adjusted so that it is? Closed, latched 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 _____. 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. D. Make sure the spare tire is secured, if it has one. 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. 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. Related Question Question: What does this sign mean? B. you need about four times as much stopping distance at 40 mph as at 20 mph Safety fail-safe features of a tractor-trailer converter dolly. You are doing a walk around inspection of a double or triple trailer rig. %PDF-1.2 % This has the same value as the %%WRONG_ANSWERS%% Variable on the Final Screen. A Open, latched B Open, free C Closed, latched D Closed, free 28. If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. B Secure converter gear support in raised position. The rear trailers shut-off valves should be closed and the front open. This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. This has the same value as the %%TIME_USED%% Variable on the Final Screen. The dolly tow bar may fly away, possibly causing panic, and making it very difficult If you crossed the air lines, you could drive away, but you would not have trailer brakes. A 0000006195 00000 n Park on level ground, put chock on the tires, and charge the air tank. 0000004689 00000 n You may be timed. you are driving at night and you must dim your headlights for traffic. will have a lamp on the drivers side. 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. Typically depends on the axle count. Your vehicle is so long that you must swing wide to make the turn. 0000003261 00000 n The dolly will have a yellow lamp on the drivers (left) side. C However there are some states that allow doubles that are each 48 feet in length. Stop the vehicle by gearing down and sparingly If there is A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. 0000003977 00000 n The couplers have a rubber seal that prevents air from escaping. 11 TestPermit.com provides free unofficial review materials for a variety of exams. Tractor-trailers are considered combination vehicles. B. slow to a safe speed before entering the curve, then accelerate slightly through it safe speed would be 40 MPH. Correct answer percentage. A The number of correct answers. 0000005554 00000 n Their drawbars differentiate them. Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? 0000008915 00000 n Pull gently against them in a low gear to make sure the brakes work. Doubles and triples are more likely to overturn than other combination vehicles because of the whip cracking effect. 4. Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. to do this without wheel chocks you should: supply air to the trailer air system with the tractor and then disconnect the emergency line. Open, free Each trailer and converter dolly has one or more air tanks. 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. Charge the system and pump the brakes with the window down. 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. B 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. The rear trailers shut off valves should be closed and the front open to allow air to the Question 3 Explanation: All of the above. When driving a double or triple trailer, greater care must be given to. A. always keep your vehicle to the right side of your lane you are driving a 100ft truck eith double trailers at 50mph. What does the Driver's manual say about how much space you should keep ahead of your truck? These mirrors: Make things seem smaller and further away than they really are. to re-capture it. If the fifth wheel on a coupling is too far forward, the tractor frame may hit? B. for doubles and triples, the fifth wheel should be all the way towards the tractor 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. the fifth wheel, so trailer is raised slightly when dolly is pushed under it. You want to lock your combination to a second trailer that has no spring brakes. 0000001775 00000 n HlTo xGf`{iIMh-x||?pbE':X4ZZZRbu7 uvi_RHUkVXBVu{^B3 4e/iw\]RE] YY7i)e V*h(++WQ-]Xm9c5yU6BS" 5HiL,[b)ee:t/ )%BVGpU7T\ZJD 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: Answer: Closed. Use controlled or stab braking Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). A Terms in this set (43) Converter dollies are used to connect: A tractor-trailer combination to another trailer. 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. 1. 1/4 in. if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. How much space should be between the upper and lower fifth wheel? There is no requirement or exact standard for color coding. If you are only pulling one trailer, make certain the valve is fully in the closed position or it will leak air out of the air system. Tips for Backing Up a Trailer Like a Pro Trucker. Before you can supply air to the air tanks of a second trailer you need to. Locking jaws closed on 0000005345 00000 n 2. Air flows steadily and isentropically through a passage. In order to receive your Doubles and Triples endorsement, it is required that you pass the state's official CDL written Knowledge exam. 7.3 Inspecting Doubles and Triples = Additional Things to Check During a Walkaround Inspection. Good speed management says you should: You must drive through deep or flowing water. It's a fifth wheel, not a sixth wheel. B What will happen if there is a major leak in the service air line? Which diagram shows the best way to turn? CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Drivers License Doubles and Triples Endorsements Knowledge Test. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. When does the "driver's manual" advise disconnecting the steering axle brakes to help Time limit varies by state. If you do, the brakes may not work correctly. [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]. When testing the coupling of the double trailer the landing gears of the rear trailer should be: You want to hook your combination to a second trailer that has no spring brakes. How can you be sure you supplied air to a second trailer? 0000005664 00000 n 0000010783 00000 n C 3. then there is a problem with the ABS system. 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. 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. 7. Open the emergency line shut-off valve at the rear of the last trailer. B. are the easiest to stop since there is no shifting cargo Explore now! D 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: Ship to Store. on kingpin. To do this without wheels chocks you should: Supply air to the trailer air system with the tractor and then disconnect the emergency line. Sketch the shape of the passage between sections 1 and 2. There are more critical parts to check when you have two or three trailers. For emergency braking you should: May have poor traction due to bouncing and wheels lockup. What three methods can you use to secure a second trailer before coupling? 10. You are driving with double trailers and must use your brakes to avoid a crash. Be sure air-lines are supported and glad hands are properly connected. When driving with more than one trailer, which trailer should be the first one behind the tractor? Explain why the waves that reflect from the far left edge of the plates in the given figure earlier exhibit destructive interference (zero intensity) at x=0x=0x=0. B. the emergency line valve open and release air The rear trailer of a triple Use the dummy couplers when the air lines are not connected to a trailer. securely fastened. The road is dry and visibility is good. The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples. 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). which of these is not a good thing to do when driving on slippery roads? A You open the emergency line shut-off valve at the rear of the last trailer and hear air escaping. A. open A. allow "much more space" than is needed for ideal driving conditions This will prevent water and dirt from getting into the coupler and the air lines. when driving a truck with more than one trailer, which trailer should be first behind the truck? The emergency brakes come on whenever air pressure in the emergency line is lost. Studying and applying oneself is the only way to successfully learn the information you need to know to pass all testing required to obtain your CDL. Take special care when pulling two and three trailers. C. posted speed limits on curves are safe for all trucks, Empty trucks: You should keep at least _____ seconds of space ahead of you. A. completely open The converter dolly air tank drain valve on coupled double/triple trailers should be: Closed. The road is dry, and visibility is good. you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. rear trailer. True! Be certain you are clear at the sides before changing lanes. The individual voltage gains of the first two stages are to be equal, while the gain of the third is to be one-fourth of each of the first two. All rights reserved Site Map. For emergency braking you should: which of these statements about emergency steering is true? A. brake and downshift in a curve View More Details. air throughout the system. A. air escape from the open valve Converter dollies are connected to front trailers with a? You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. When driving a truck with more than one trailer, which trailer should be first behind the truck? 1/2 to 3/4 of an inch Compressed air usually has some water and some compressor oil in it. Seriously! unsafe slow down even further, or better yet, find a safe haven and park until the When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? Unless you are draining the condensation out of the air tank, then the drain valve We have a new version of this program. What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? 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. 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 You should NOT: You should reduce your speed by about _____ on a wet road. B. slightly raised Go to the rear of second trailer and open the emergency line shut-of valve. A. open the shut-off valves at the rear of both trailers If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen? When the road is slippery Which of these statements about quick steering movements and doubles/triples is true? 0000002446 00000 n A good and safe driver will always look out for ______. Please visit using a browser with javascript enabled. Make sure trailer height is correct. You are visually checking the coupling of a converter dolly to the rear trailer. There is no obligation whatsoever. When you do this, you should hear: You must stop, yield to traffic and pedestrians, and only proceed when safe. You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. Question 4. Doubles and triples take up more space than other commercial vehicles. A full trailer behind a truck 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. Help your friends discover what it takes to become a successful truck driver. Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). The lightest 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 _______. However, converter dollies and trailers built before 1975 are not required to have spring brakes. 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. 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. B. you should avoid traveling next to others whenever possible Which of the following will occur? 3. Number of wrong answers. All other trailer air functions use the emergency line. On a triple combination, the shutoff valves on the rear of the last trailer should be? You should be sure the converter dolly air tank . If the converter dolly is close to your semitrailer, you should wheel it into position? Converter dolly air tank drain valve: CLOSED. You will speak with recruiters today. Which is most likely to tip over: Ensuring the safety of the public starts with a thorough inspection of all equipment. How many different ways of coupling and uncoupling trailer combinations are there? What's a converter dolly? True or False? Usually need a glad hand converter Should the shut-off valves on the trailers be open or closed on a set of double trailers? Make sure pintle hook is latched. When coupling twin trailers, a converter dolly is. Make sure you have large enough gaps before entering or crossing traffic. The emergency brakes come on whenever the air supply knob is pulled out or the trailer is disconnected. C. use stab or controlled braking, Which of these is true? Doubles and triples are more likely to turn over than other combination vehicles because of the "crack- the-whip" effect. The tanks will hold enough air to allow the brakes to be used several times even if the compressor stops working. A converter dolly is still under the second trailer when you unlock the pintle hook. How do you check to make sure the trailer height is correct before coupling? 12, 3. When driving doubles or triples how should they be driven to avoid rollover or jackknifing: 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? Push the brake pedal as hard as you can and hold it there You should NOT: You are driving a set of doubles and a set of trailer wheels goes into a skid. Types of converter dollies. Try our free CDL Doubles and Triples Test Question and Answers Quiz online. That split second that you release the brakes will allow them to match the vehicles road To help, some companies offer their drivers per diem to get them started Read More, Driving a semi-truck for a living is unlike any other profession. If you do, there is a problem. If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? re-couple, You can if you want to, it does not matter. Make sure you can hear air escaping with the valve closed. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? Closed, free, 8. Calculate the net energy change in kilojoules per mole that takes place on formation of MgF2_22(s) from the elements: Heat of sublimation for Mg(s) = 147.7 kJ/mol Eea_{ea}ea for F(g) = -328 kJ>mol, Bond dissociation energy for F2_22(g) = 158 kJ>mol Ei1_{i1}i1 for Mg(g) = 737.7 kJ>mol, Electrostatic interactions in MgF2_22(s) = -2957 kJ/mol Ei2_{i2}i2 for Mg(g) = 1450.7 kJ/mol. You should keep at least ____ seconds of space ahead of you. When checking the coupling system, make sure that the locking jaws are around the shank of the. 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. Lock pintle hook. You should be sure the converter dolly air tank drain valves are _______ & the pintle hook is __________. The road is dry and visibility is good. 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 All of the above, 6. A 0000009577 00000 n go to the rear of the second trailer and open the emergency line shut off, before you can supply air to the air tanks of the second trailer you need too, open the shut-off valves at the rear of the first trailer & close the shut-off valves at the rear of the second trailer. A-dolly. This has the same value as the %%TOTAL%% Variable on the Final Screen. C. add "one car length for every 10 mph", Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Incidental Motions & Motions that Bring a Que. Doubles and triples are more likely to turn over than other combination vehicles because of the "crack-the-whip" effect. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. [Flashing Signals, Traffic Signals, Chapter 5 - Signals, Signs and Pavement Markings, North Carolina Driver's Handbook], One component of the DUI sentence in the state of Tennessee is twenty-four hours of litter pick-up wearing clothing that says "I am a drunk driver." 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. If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. the rig will continue moving in a straight line no matter how much the steering wheel is turned. All ABS equipped units Which of these is NOT a good thing to do when driving on slippery roads? can and will get stuck on a raised railroad crossing. Doubles and triples must be driven very smoothly to avoid rollover or jackknife. This has the same value as the %%SCORE%% Variable on the Final Screen. Open, latched 0000010705 00000 n Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. Hazardous materials must be placarded on all four sides of EACH Trailer. They are not only longer, but also need more space because they cannot be turned or stopped suddenly. Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. 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 These mirrors: make things seem smaller & further away then they really are. What is a converter dolly? Only trailers designed to be pulled with another trailer behind it will have a shut off valve. On the middle trailer of a set of triples? 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. Our normal business hours are Monday-Friday 8 a.m. to 5 p.m. (Pacific Time). Trailer Air Tanks And Shutoff Valves - Page 50. The rear trailer does not have shut-off valves. What happens if you cross the Emergency Air Line and the Service Air Line? Some large trucks have curved (convex or spot) mirrors. Stay up to date on truck driving industry news. At section 2 downstream, the speed is 519 m/s. Pintle-eye of dolly in place in pintle hook of trailer (s).