The emergency line valve open and release air when does the drivers manual say you should disable the steering axle brakes? Once that's complete, then its an easy push back and the 0000005554 00000 n Related Question Question: What does this sign mean? A The final procedure when connecting a rear trailer is to? C You are driving with double trailers and must use your brakes to avoid a crash. 0000003998 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 _____. You should keep at least ____ seconds of space ahead of you. The rear trailer does not have shut-off valves. If spare tire is carried on converter gear (dolly), make sure it's secured. air throughout the system. ), a 15 year truck driving veteran, in January 2007. the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. 0000002636 00000 n Page 7-6 Commercial Driver's Manual/2.0 = Be sure air lines are supported and glad hands are properly connected. 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]. 0000003060 00000 n which of these statements about managing space to the sides is true? Have little braking power because they are small When you do this, you should hear: Air flows steadily and isentropically through a passage. rear trailer. Those that do not have spring brakes have emergency brakes that work from the air stored in the trailer air tank. you are doing a walkaround inspection of a double or triple trailer rig. 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. When you do this, you should hear: you are driving with double trailer and must use your brakes to avoid a crash. You must steer gently when pulling trailers. The last trailer in a combination is most likely to turn over. 0000003261 00000 n 0000005664 00000 n how can you be sure you supplied air to a second trailer? When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. King pin. These trailers have no parking brake. 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. Mar 2 - Mar 3. rear brakes will not work properly. This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. Charge the system and pump the brakes with the window down. 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. We have a new version of this program. B For emergency braking you should: A Push the brake pedal as hard as you can and hold it there B 1. B. restore traction to the tires Take special care when pulling two and three trailers. Typically depends on the axle count. Please wait while the activity loads. 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. 7.3 Inspecting Doubles and Triples = Additional Things to Check During a Walkaround Inspection. The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. A connection device of one axle used to disconnect a semitrailer combination vehicle "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. Because of this, which of the following vehicle parts is most likely to tip over? Types of converter dollies. How do you check to make sure the trailer height is correct before coupling? When coupling, be sure to couple the proper glad hands together. 0000008915 00000 n What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? What happens when there is a major leak in the emergency air line? Which f these will result in the best control on curves? However there are some states that allow doubles that are each 48 feet in length. If not, there is a problem. Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? All rights reserved Site Map. B. pull gently against the pin of the second semitrailer 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. Older trailers do not have spring brakes. slow to safe speed before entering, then accelerate slightly through the curve. On the middle trailer of a set of triples? If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). . 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? A. opening the air tank petcock By clicking on "Sign Up", you agree to our Terms of Use and Privacy Policy. 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. The heaviest trailer the road is dry & visibility is good. How To Use Cruise Control Effectively As A Truck Driver. A. require shorter stopping distances than full ones What three methods can you use to secure a second trailer before coupling? Slow to a safe speed before entering the curve, then coast through the curve. 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. You will have greater length and more dead axles to pull with your drive axles than other drivers. Some vehicles have dead end or dummy couplers to which the hoses may be attached when they are not in use. A dolly should be pulled out from a rear trailer using? True! 0000008166 00000 n coupled to the rear of a tractor-trailer combination forming a double bottom rig, Careful of the wording! A There is a school zone ahead. 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? 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. Your vehicle is so long that you must swing wide to make the turn. with the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. Use the dummy couplers when the air lines are not connected to a trailer. Safety should never take second place, so know your stuff! Please use the form below to contact our customer service or sales team. C To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space You can test that air is flowing to all trailers by opening? you want to hook your combination to a second trailer that has no spring brakes. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. Usually need a glad hand converter securely fastened. The coupling between a rear trailer and a dolly should have a space between the upper and lower fifth wheels of? The emergency brakes come on whenever the air supply knob is pulled out or the trailer is disconnected. Also, this page requires javascript. Take special care when pulling two and three trailers. if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. will have a lamp on the drivers side. Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). Doubles and triples are more likely to turn over than other combination vehicles because of what effect? A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. When uncoupling a rear trailer, you should remove some weight from the dolly by? open, closed, closed: Term. What three methods can you use to secure a second trailer before coupling? B 10. True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? This has the same value as the %%WRONG_ANSWERS%% Variable on the Final Screen. Definition. What's a converter dolly? It is important not to let water and oil build up in the air tanks. These valves permit closing the air lines off when another trailer is not being towed. A. use light, steady pressure on the brake pedal You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. Open Converter dolly air tank drain valve: CLOSED. If your tanks have automatic drains, they will keep most moisture out, but you should still open the drains to make sure. When coupling twin trailers, a converter dolly is. Any vehicle required by federal regulations to be placarded while transporting hazardous materials. Seriously! How many different ways of coupling and uncoupling trailer combinations are there? These dollies will have a yellow lamp on the left side of the dolly. If you do, the brakes may not work correctly. You must treat a flashing red signal as you would treat a STOP sign. If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? When driving a double or triple trailer, greater care must be given to. Hit the article below to see specific information about AOBRDs! The dolly tow bar may fly up Ship to Store. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. They are filled by the emergency (supply) line from the tractor. For emergency braking you should: You must check that all shut-off valves are in the open position except the ones at the back of the last trailer, which must be closed. A turn of the glad hand attached to the hose will join and lock the couplers. The pintle hook should always be secure when the vehicle is in motion. 3. A. the total stopping distance of a truck is the distance it takes to stop once the brakes are put on at any speed 0000001107 00000 n Park on level ground, put chock on the tires, and charge the air tank. How much space should be between the upper and lower fifth wheel? 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: Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! Calculate the Mach number at section 2. 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. They provide the air pressure used to operate trailer brakes. A truckers workspace is a small moving office Read More. Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. The Verge logo. Leave the emergency line shut-off valve closed and open the service line valve. They provide the air pressure used to operate trailer brakes. High Road 2.0! Pull gently against the pin of the second trailer. 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. 9 You should keep at least _____ seconds of space ahead of you. The number of correct answers. 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? [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]. Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver. What is a converter dolly? 0000007508 00000 n Often do not have spring brakes You are driving with double trailers and must use your brakes to avoid a crash. You should NOT: The couplers have a rubber seal that prevents air from escaping. 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 should not hear air escaping. Seriously! When you do this, you should hear: Ais escape from the open valve. A. use a low gear 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. The word part ferrit- means: 8. B. for doubles and triples, the fifth wheel should be all the way towards the tractor Pintle hook latched. When uncoupling a rear trailer, your rig should be parked in a straight line on? You should be sure the converter dolly air tank drain . 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. 12, 3. If this activity does not load, try refreshing your browser. Provides a snug fit to eliminate unwanted seepage of air or water. That there is no space between upper and lower sixth wheel. Make sure to visually inspect the fifth wheel and that the locking mechanism is 1/4 in. You may not notice a major leak in the service line until you try to put the brakes on. and possible answers include: open, free or closed, latched or closed, free or open, latched from TruckersDouble & Triple Trailer (CDL) Endorsement. Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? D Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. 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 ADVERTISEMENT ADVERTISEMENT CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Drivers License Doubles and Triples Endorsements Knowledge Test. The lighter trailer should be in the rear. You should look into the back of the fifth wheel on a dolly to see if it is locked onto the kingpin, A safe speed on a curve for a straight truck or a single trailer combination vehicle may be too fast for double or triple trailers. Connect Converter Dolly to Front Trailer Back first semitrailer into position in front of dolly tongue. The trailer is at the correct height when. A. air escape from the open valve These valves permit closing the air lines off when another trailer is not being towed. 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. How can you be sure you supplied air to a second trailer? All trademarks are property of their respective owners. A 360 degree area of awareness is Therefor, if there is a major leak in your service line, you may not know it until you try to use the service brake. fifth wheel, so trailer is raised slightly when dolly is pushed under it. A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. (done) Chp 23: Cash Flow + Working Capital, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. D Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. 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. kingpin, That there is grease between upper and lower fifth wheel. the fifth wheel, so trailer is raised slightly when dolly is pushed under it. How should you test the coupling? When checking the coupling system, make sure that the locking jaws are around the shank of the. 4. S-cam brakes are the most common style brakes on large trucks today. 0000006015 00000 n The tanks will hold enough air to allow the brakes to be used several times even if the compressor stops working. Each trailer and converter dolly has one or more air tanks. You are driving a 100 ft twin trailer combination at 50 mph. 60607. We are an independent company focused on providing valuable motor vehicle and permit practice test information. This is CDL Doubles and Triples Test 3in our original Classic Mode. To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? A. open 2. Which of these statements about quick steering movements and doubles/triples is true? The converter dolly is an auxiliary axle with a coupling device. Select the answer that correctly completes each statement. not have spring brakes. Use controlled or stab braking 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. You may be timed. Should the shut-off valves on the trailers be open or closed on a set of double trailers? What do you check when making a visual check of coupling? door. Go to the rear of second trailer and open the emergency line shut-of valve. None of the above, 5. The total number of questions. Converter dollies have spring brakes. kingpin. 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. speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. 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. Why should you not use the trailer hand valve while driving? What types of trailers can get stuck on raised crossings? You are visually checking the coupling of a converter dolly to the rear trailer. Locking jaws closed on Which of these is most likely too occur? B. open; latched This has the same value as the %%SCORE%% Variable on the Final Screen. For emergency braking you should: You are doing a walk around inspection of a double or triple trailer rig. Some do. you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. If there is a trailer Then, the air loss from the leak will lower the air tank pressure quickly. _______ should be tested with the hand valve but controlled in normal operation with the foot pedal. Dont hesitate to take advantage of our practice tests in each category specific to your needs. If you feel A. hand valve To check if the converter dolly is securely coupled to the rear trailer you should: Pull gently against the pin of the second trailer. 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. B. Join 50,000+ users around America to get your Commercial Driver License today! B. you should avoid traveling next to others whenever possible This will let the rear wheels roll again and keep the rear wheels from sliding. Should the converter dolly air-tank drain valve be open or closed on a double trailer combination? Which diagram shows the best way to turn? Simply click in your answer to each CDL practice test question. Which of these statements about managing space to the sides is true? Open the emergency line shut-off valve at the rear of the last trailer. HlTo xGf`{iIMh-x||?pbE':X4ZZZRbu7 uvi_RHUkVXBVu{^B3 4e/iw\]RE] YY7i)e V*h(++WQ-]Xm9c5yU6BS" 5HiL,[b)ee:t/ )%BVGpU7T\ZJD You need to stop braking because it's necessary for you to speed up, When you are in a drive-wheel braking skid, the first thing to do is STOP BRAKING! Delivering to. The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. Secure converter gear support in raised position. when driving a truck with more than one trailer, which trailer should be first behind the truck? In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. On a triple combination, the shutoff valves at the rear off the middle trailer should be? On a triple combination, the shutoff valves on the rear of the last trailer should be? If the converter dolly is close to your semitrailer, you should wheel it into position? How do you check to make sure trailer height is correct before coupling? Make sure trailer height is correct. 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. Number of wrong answers. B. are the easiest to stop since there is no shifting cargo doubles/triples flip flop over from quick steering movements more easily than many other vehicles. Doubles and triples must be driven very smoothly to avoid rollover or jackknife. some large trucks have curved (convex or spot) mirrors. When connecting two trailers the converter dolly is connected to the rear trailer first. Sometimes, metal tags are attached to the lines with the words service and emergency stamped on them. A The dolly tow bar may flip up causing bodily injury and making it very difficult to Converter dollies: C Pintle-eye of dolly in place in pintle hook of trailer (s). Open. The dolly tow bar may fly up, possibly causing injury, and making it very difficult to When does the "driver's manual" advise disconnecting the steering axle brakes to help C. use stab or controlled braking, Which of these is true? What should you check for when inspecting the converter dolly and the pintle hook? recouple. Your tractor protection valve control should pop out, or go from normal to emergency position, when air pressure falls into what range? 0000009577 00000 n A. you can steer more quickly and safely if you hold the wheel with one hand These mirrors: 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. and ensuring it is secure. 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? By using this site, you agree to be bound by our Terms of Use, Privacy Policy and Cookie Policy, Copyright 2000-2023 MH Sub I, LLC dba Internet Brands. This will supply air to the emergency (supply) lines. Closed, free, 8. you should keep atleast __seconds of space ahead of you. The road is dry and visibility is good. 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. Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. They are filled by the emergency (supply) line from the tractor. Visually check to make sure that the rear trailer is slightly lower than the center of the Tips for Backing Up a Trailer Like a Pro Trucker. paramount to safe driving. A Open, latched B Open, free C Closed, latched D Closed, free 28. CDL License Requirements State By State. 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; . 0000001956 00000 n You open the emergency line shut-off valve at the rear of the last trailer and hear air escaping. 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. A B Doubles and triples are more likely to turn over than other combination vehicles because of the "crack- the-whip" effect. Air pressure is sent from the air tanks to the brakes by relay valves. You want to lock your combination to a second trailer that has no spring brakes. safe speed would be 40 MPH. which of these statements about the handling of doubles and triples is true ? Which of the following must be connected when coupling tractor to trailer or trailer to trailer? All other trailer air functions use the emergency line. C. closed; unlatched, Which of these will result in the best control on a curve? 0000001354 00000 n TestPermit.com provides free unofficial review materials for a variety of exams. which of these statements about quick steering movements and doubles/triples is true? 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. Push the brake pedal as hard as you can and hold it there 1. Time used (Requires timer add on). Air pressure is sent from the air tanks to the brakes by relay valves.