Like a trailer, a dolly equipped with ABS will have a yellow indicator light on the left side. cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. 0000003977 00000 n While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. Release Dolly breaks by opening the air tank petcock or if the dolly has a spring break, use the Dolly parking brake control . Some do. how can you be sure you supplied air to a second trailer? Open the emergency line shut-off valve at the rear of the last trailer. 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. The final procedure when connecting a rear trailer is to? You are doing a walk around inspection of a double or triple trailer rig. Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. The air lines will rupture Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? Converter dollies are connected to front trailers with a? 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. 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. C Watch the wording of the question AND the answers A safe driver will look for all of the above. When connecting a converter dolly to a rear trailer, the trailer height must be adjusted so that it is? 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: Go to the rear of the rig. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. When driving a truck with more than one trailer, which trailer should be first behind the truck? This has the same value as the %%SCORE%% Variable on the Final Screen. There is more chance for skids and loss of traction. which of these statements about quick steering movements and doubles/triples is true? The road is dry, and visibility is good. when driving a truck with more than one trailer, which trailer should be first behind the truck? None of the above, 4. 0000001354 00000 n Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. Safety chains should be secured to trailer(s). Closed, latched How do you check to make sure trailer height is correct before coupling? Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? Converter dolly air tank drain valve: CLOSED. C. 3, You are doing a walk around inspection of a double or triple trailer rig. 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. Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). C. closed; unlatched, Which of these will result in the best control on a curve? . 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. you need about four times as much stopping distance at 40 mph as at 20 mph If this lamp is illuminated and does not go out, A. always keep your vehicle to the right side of your lane Never, 9. If you feel Which diagram shows the best way to turn? Check them all. Allow more following distance. When uncoupling doubles or triples, what is important to know about unlocking the pintle hook? B 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]. For emergency braking you should: securely fastened. inspection of all equipment. Which of these is NOT a good thing to do when driving on slippery roads? 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. Seriously! When uncoupling a rear trailer, your rig should be parked in a straight line on? Time allowed (Requires timer add on). A vehicle transporting hazardous materials is required to display placards where? A. brake and downshift in a curve 0000003240 00000 n A driver of a vehicle with double or triple trailers will have greater length and more dead axles to pull, increasing the likelihood of a wreck. Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. A. closed; latched Blue is used for the service lines, and red for the emergency (supply) lines. The shut off valves, when in the open position, allows air to flow out to another trailer. 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. A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. 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. You have not finished your quiz. 10 A. hand valve Related Question Question: What does this sign mean? Which of these statements about managing space to the sides is true? Calculate the Mach number at section 2. B. releasing the pintle hook These dollies will have a yellow lamp on the left side of the dolly Questions You Should Know For Doubles And Triples 1. What three methods can you use to secure a second trailer before coupling? Study section 6.2 if you can't answer all of these questions. How much space should be between the upper and lower fifth wheel? Each trailer and converter dolly has one or more air tanks. 0000004689 00000 n 0000006383 00000 n Should the converter dolly air-tank drain valve be open or closed on a double trailer combination? B Make sure you do not get in a spot you cannot pull straight through. Page 7-6 Commercial Driver's Manual/2.0 = Be sure air lines are supported and glad hands are properly connected. A. use a low gear The rear trailers shut-off valves should be open and the front closed. Correct answer percentage. All of the above, 6. A. open 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! Make sure the converter dolly air tank drain valve is closed. B. you can almost always stop more quickly than you can turn This is CDL Doubles and Triples Test 3in our original Classic Mode. None of the above, 2. Pull gently against the pin of the second trailer. Unless you are draining the condensation out of the air tank, then the drain valve What is the most common foundation brake found on heavy vehicles? On double and triple combinations, you must make sure that which of these is secure? 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. Any trailer with a reduced ground clearance B What three methods can you use to secure a second trailer before coupling? 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: You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. What is one function of the tractor protection valve? HlTo xGf`{iIMh-x||?pbE':X4ZZZRbu7 uvi_RHUkVXBVu{^B3 4e/iw\]RE] YY7i)e V*h(++WQ-]Xm9c5yU6BS" 5HiL,[b)ee:t/ )%BVGpU7T\ZJD 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. For a particular IC-fabrication process, the transconductance parameter kn=400A/V2,k_{n}^{\prime}=400 \mu \mathrm{A} / \mathrm{V}^{2},kn=400A/V2, and Vt=0.5V.V_{t}=0.5 \mathrm{V}.Vt=0.5V. door. You are doing a walk around inspection of a double or triple trailer rig. You should NOT: You are driving a set of doubles and a set of trailer wheels goes into a skid. Question 3 Explanation: All of the above. Visually check to make sure that the rear trailer is slightly lower than the center of the What does the drivers manual say about how much space you should keep ahead of your truck? you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. C Email Updates When New Articles Are Posted. 3. TestPermit.com provides free unofficial review materials for a variety of exams. 3. If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). The road is dry and visibility is good. On a triple combination, the shutoff valves at the rear off the middle trailer should be? What do you check when making a visual check of coupling? You should be sure the converter dolly air tank . Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? A. you can steer more quickly and safely if you hold the wheel with one hand Take special care when pulling two and three trailers. The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. Be sure air-lines are supported and glad hands are properly connected. B. the emergency line valve open and release air C. foot pedal, Which of these statements about managing space to the sides is true? For emergency braking you should: May have poor traction due to bouncing and wheels lockup. 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: A 360 degree area of awareness is Open, free You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. C. the service brakes slowly move to the fully applied position, Some large trucks have converted or "spot" mirrors. d. protein. The Doubles and Triples written CDL Exam is required for your doubles and triples endorsement. B When connecting the glad hands, press the two seals together with the couplers at a 90-degree angle to each other. Why should you use chocks when parking a trailer without spring brakes? You may be timed. Remember however, that is just a suggestion. Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. Doubles/triples flip flop over from quick steering moves more easily than many vehicles. Make sure to visually inspect the fifth wheel and that the locking mechanism is This has the same value as the %%TOTAL%% Variable on the Final Screen. What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly? Dont hesitate to take advantage of our practice tests in each category specific to your needs. C Newer trailers have spring brakes just like trucks and truck tractors. Air flows steadily and isentropically through a passage. What three methods can you use to secure a second trailer before coupling? When driving a double or triple trailer, greater care must be given to. Because of this, which of the following vehicle parts is most likely to tip over? 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 the road is dry & visibility is good. The shortest trailer . Never pull any trailer without visually inspecting the fifth wheel locking bar You are driving a 100 ft twin trailer combination at 50 mph. What types of trailers can get stuck on raised crossings? When does the "driver's manual" advise disconnecting the steering axle brakes to help Your vehicle is so long that you must swing wide to make the turn. B. slightly open What does the Driver's manual say about how much space you should keep ahead of your truck? CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Drivers License Doubles and Triples Endorsements Knowledge Test. A sudden movement with the steering wheel can result in a tipping over rear trailer. 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. to re-capture it. By clicking on "Sign Up", you agree to our Terms of Use and Privacy Policy. 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. When connecting two trailers the converter dolly is connected to the rear trailer first. Which of the following statements about off tracking is true? On the first trailer in a set of doubles? What should you check for when inspecting the converter dolly and the pintle hook? 0000006195 00000 n A. air escape from the open valve B. keep other traffic out of your side space While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. B. johnson bar Should the shut-off valves on the rear of the last trailer be open or closed? open, closed, closed: Term. Submit your email at the end of the test. The emergency line valve open and release air [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. You should check the height of the trailer before connecting a converter dolly to a second or third trailer. you are doing a walkaround inspection of a double or triple trailer rig. Some areas of concern are discussed below. B. open; latched D You should NOT: What is a converter dolly? None of the above, 5. rear brakes will not work properly. Therefor, if there is a major leak in your service line, you may not know it until you try to use the service brake. Open the shut-off valves at the rear of the last trailer and listen for air flow. A full trailer behind a truck They are filled by the emergency (supply) line from the tractor. Only a certified diesel mechanic can check this. What will happen if there is a major leak in the service air line? Any vehicle required by federal regulations to be placarded while transporting hazardous materials. 2. 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. You should keep at least ____ seconds of space ahead of you. [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." When you do this, you should hear: Which of the following will occur? True! and the converter dolly air tank drain valve should be _____. If the fifth wheel on a coupling is too far forward, the tractor frame may hit? Sketch the shape of the passage between sections 1 and 2. The dolly will have a yellow lamp on the drivers (left) side. B safe speed would be 40 MPH. Good speed management says you should: You must drive through deep or flowing water. A. open the shut-off valves at the rear of both trailers 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. It's a fifth wheel, not a sixth wheel. True or False? When checking your air lines, they must be secure and? A. countersteer 0000009577 00000 n c. iron Why is there still destructive interference? That there is some space between the upper and lower fifth wheel. However there are some states that allow doubles that are each 48 feet in length. If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples. A you are visually checking the coupling of a converter dolly to the rear trailer. Clean the couplers and rubber seals before a connection is made. dress gifs. How To Use Cruise Control Effectively As A Truck Driver. This means. A converter dolly is still under the second trailer when you unlock the pintle hook. Slow to the safe speed before entering, then accelerate slightly through the curve. retrovirus $_____________________________$. They provide the air pressure used to operate trailer brakes. C kingpin, That there is grease between upper and lower fifth wheel. you are driving on a slippery road during the day. That split second that you release the brakes will allow them to match the vehicles road will have a lamp on the drivers side. 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. This will let the rear wheels roll again and keep the rear wheels from sliding. A The dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. 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 are driving a triple trailer and there is a loss of air pressure in the emergency line. Select the answer that correctly completes each statement. air throughout the system. You are driving with double trailers and must use your brakes to avoid a crash. They provide the air pressure used to operate trailer brakes. A. completely open then there is a problem with the ABS system. Hit the article to see the way to back up your trailer like a pro! When inspecting the air brakes on doubles and triples, you wait for air pressure to reach normal, then push in the red trailer air supply knob. To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: Closed. Please wait while the activity loads. weather passes. A dolly is like a very short trailer, with a ring hitch on the front and a fifth wheel on top. 0000007032 00000 n These dollies will have a yellow lamp on the left side of the dolly. When only pulling one trailer, be sure the shut-off valves are all in the fully closed position. There is a school zone ahead. You must steer gently when pulling trailers. 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 Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! A The application only takes one minute. To check air flows to all trailers, you should let air pressure reach normal then? When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. You must treat a flashing red signal as you would treat a STOP sign. Open the emergency line shut-off valve at the rear of the last trailer. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. What is likely to happen? They are filled by the emergency (supply) line from the tractor. Older trailers do not have spring brakes. If the dolly is a two axle unit then 1 It is important to check the height of the trailer before connecting a converter dolly to a trailer. Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. paramount to safe driving. These valves permit closing the air lines off when another trailer is not being towed. 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. Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. 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. If there is not have spring brakes. 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. rear trailer. Each trailer and converter dolly has one or more air tanks. Chock the tires, park on level ground and charge the trailer air tank if it does Becoming A Truck Driver is a dream we've all pondered at some point in our lives. Ensuring the safety of the public starts with a thorough These trailers have no parking brake. to do this without wheel chocks you should: supply air to the trailer air system with the tractor and then disconnect the emergency line. The lighter semitrailer should be in first position behind the tractor. You will speak with recruiters today. Which of these are the correct positions for shut-off valves in doubles and triples? the trailer height is right when: the trailer will be raised slightly when the converter dolly is backed under it. You must stop, yield to traffic and pedestrians, and only proceed when safe. Pintle hook latched. HK Extended Tank Drain Assembly Kit with 10 Inch Braided Steel Hose 1/4 Inch Drain Valve and Elbow Fitting for Air Compressor 4.7 (463) $1499 FREE delivery Thu, Mar 9 on $25 of items shipped by Amazon Small Business All Tool Depot Air Compressor Drain Valve Replacement for Craftsman Petcock 072-0001, 072-0006 (1-Pack) 4.2 (20) $649 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. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space Pull gently against them in a low gear to make sure the brakes work. All other trailer air functions use the emergency line. A 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. Once you are finished, click the button below. 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? the rig will continue moving in a straight line no matter how much the steering wheel is turned. Should I Be A Truck Driver? You are visually checking the coupling of a converter dolly to the rear trailer. The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. C Safety chains secured to trailer (s). A You should hear air escaping, showing the entire system is charged. There are two types of converter dollies. You are doing a walkaround inspection of a double or triple trailer rig. 0000007508 00000 n Provides a snug fit to eliminate unwanted seepage of air or water. You are visually checking the coupling of a converter dolly to the rear trailer. Hb```f``b`c``e@ (Q6_* Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? 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. 0000005345 00000 n 0000010705 00000 n Simply click in your answer to each CDL practice test question. [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]. New! Once that's complete, then its an easy push back and the How do you check to make sure the trailer height is correct before coupling? A) one inch of space . 8. When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested More driving knowledge, questions and answers, online practice tests for obtaining a drivers . These mirrors: Make things seem smaller and further away than they really are. 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. 9 which of these statements about managing space to the sides is true? Our normal business hours are Monday-Friday 8 a.m. to 5 p.m. (Pacific Time). Locking jaws closed on can and will get stuck on a raised railroad crossing. B 2003-2023 Chegg Inc. All rights reserved. D 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. When does the Driver's manual say you should disable the steering axle brake? Contributor: Luke Nold (Experienced truck driver for 5+ years and published writer for Fleet Magazine). Be more careful in adverse conditions. Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). 0000005664 00000 n 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. A. require shorter stopping distances than full ones When uncoupling a rear trailer, you should remove some weight from the dolly by? Which of these is most likely to occur? 7. Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. Question 4. These mirrors: D When checking the fifth wheel, you should make sure that it has enough? A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. 0000001775 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. Therefore, look far ahead so you can slow down or change lanes gradually when necessary. Always unlock the pintle hook with the dolly still under the rear trailer. 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. symptoms of a bad fuel tank selector switch. Converter dollies have spring brakes. Use the engine brake or speed retarder. Slow to a safe speed before entering the curve, then coast through the curve. Some vehicles have dead end or dummy couplers to which the hoses may be attached when they are not in use. the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. Go to the rear of second trailer and open the emergency line shut-of valve. Eventually, the air will leak away, and then there will be no brakes. 0000005554 00000 n If you do, the brakes may not work correctly. Ship to Store. The pressure in the service line is controlled by the brake pedal and the trailer hand brake.