[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." Once you have coupled your rear trailer, you should test the coupling by? What value of channel width must the design use? 0000002446 00000 n what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. Follow the procedures described later in this section. There is no obligation whatsoever. 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! Which of these is NOT a good thing to do when driving on slippery roads? 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 What three methods can you use to secure a second trailer before coupling? Any items you have not completed will be marked incorrect. Charge the system and pump the brakes with the window down. Time used (Requires timer add on). Use the dummy couplers when the air lines are not connected to a 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. The total number of questions. 0000008187 00000 n Converter dolly air tank drain valve: CLOSED. You are doing a walkaround inspection of a double or triple trailer rig. The A-dolly has a single drawbar with a single, centered hitching point. 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 Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver. The number of correct answers. C. use controlled or stab braking, The best way to stop any skid is to: 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. Ideal for replacing a worn, leaky drain valve on a compressor. This will prevent water and dirt from getting into the coupler and the air lines. Sketch the shape of the passage between sections 1 and 2. The last trailer in a combination is most likely to turn over. should remain in the closed position. Therefor, if there is a major leak in your service line, you may not know it until you try to use the service brake. If you leave this page, your progress will be lost. When you do this, you should hear: Ais escape from the open valve. 0000010705 00000 n 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. Hb```f``b`c``e@ (Q6_* A sudden movement with the steering wheel can result in a tipping over rear trailer. paramount to safe driving. A bent or damaged kingpin on a coupling should be? A We are an independent company focused on providing valuable motor vehicle and permit practice test information. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. 3. When driving doubles or triples how should they be driven to avoid rollover or jackknifing: A Doubles and triples are more likely to overturn than other combination vehicles because of the whip cracking effect. You should keep at least ____ seconds of space ahead of you. 2003-2023 Chegg Inc. All rights reserved. D 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. B d. protein. 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. If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen? 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. The last trailer in a combination is most likely to turn over. 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. To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: Closed. converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. Slow to the safe speed before entering, then accelerate slightly through the curve. Simply click in your answer to each CDL practice test question. Clean the couplers and rubber seals before a connection is made. TestPermit.com provides free unofficial review materials for a variety of exams. A. always keep your vehicle to the right side of your lane 0000007508 00000 n 4. You should NOT: 0000007487 00000 n You should check the height of the trailer before connecting a converter dolly to a second or third trailer. The service brakes slowly move to the fully applied position The crack the whip effect will topple the rear trailer first. 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? B. use only the trailer brakes 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? 1. The tanks will hold enough air to allow the brakes to be used several times even if the compressor stops working. Some do. 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? 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]. Air escape from the open valve What should you check for when inspecting the converter dolly? You should keep at least ____ seconds of space ahead of you. Some vehicles have dead end or dummy couplers to which the hoses may be attached when they are not in use. Compressed air usually has some water and some compressor oil in it. B. restore traction to the tires True! Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). Hit the article below to see specific information about AOBRDs! The pintle hook should always be secure when the vehicle is in motion. Related Question Question: What does this sign mean? cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. This has the same value as the %%WRONG_ANSWERS%% Variable on the Final Screen. What three methods can you use to secure a second trailer before coupling? Connect Converter Dolly to Front Trailer Back first semitrailer into position in front of dolly tongue. Make sure you have large enough gaps before entering or crossing traffic. rear trailer. Have little braking power because they are small By clicking the ["Send"] button, you agree to our Terms of Use and Privacy Policy, and to the use of cookies described therein, and you also consent to the collection, storage, and processing of your data in the United States where the level of data protection may be different from that in your country. When does the Driver's manual say you should disable the steering axle brake? View More Details. Tips for Backing Up a Trailer Like a Pro Trucker. When checking the coupling system, make sure that the locking jaws are around the shank of the. Your vehicle is so long that you must swing wide to make the turn. Before you can supply air to the air tanks of a second trailer you need to. 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. When you're trying to correct a drive-wheel braking skid why should you stop braking? Remember however, that is just a suggestion. Do converter dollies have spring brakes? The lighter semitrailer should be in first position behind the tractor. These dollies will have a yellow lamp on the left side of the dolly. How do you check to make sure the trailer height is correct before coupling? 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. symptoms of a bad fuel tank selector switch. 0000001375 00000 n In an application in which vGS=vDS=Vsupply=1.8V,v_{G S}=v_{D S}=V_{\text { supply }}=1.8 \mathrm{V},vGS=vDS=Vsupply=1.8V, a drain current of 2 mA is required of a device of minimum length of 0.18m.0.18 \mu \mathrm{m}.0.18m. This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. Dont hesitate to take advantage of our practice tests in each category specific to your needs. You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. You are visually checking the coupling of a converter dolly to the rear trailer. When you do this, you should hear: Each trailer and converter dolly has one or more air tanks. A. countersteer Any trailer with a reduced ground clearance A. closed; latched Older trailers do not have spring brakes. 7.3 Inspecting Doubles and Triples = Additional Things to Check During a Walkaround Inspection. CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Drivers License Doubles and Triples Endorsements Knowledge Test. Select the answer that correctly completes each statement. To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? It is important not to let water and oil build up in the air tanks. The air lines will rupture B. closed C You can find it here: High Road 2.0. Email Updates When New Articles Are Posted. None True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? Time allowed (Requires timer add on). C you are driving a set of doubles and a set of trailer wheels goes in a skid. The dolly tow bar may fly up There is more chance for skids and loss of traction. When uncoupling a rear trailer, you should remove some weight from the dolly by? Leave the emergency line shut-off valve closed and open the service line valve. Please visit using a browser with javascript enabled. 5. The lighter trailer should be in the rear. Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? The rear trailers shut-off valves should be closed and the front open. 1 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 may not notice a major leak in the service line until you try to put the brakes on. Which of these is most likely to occur? Doubles and triples are more likely to turn over than other combination vehicles because of what effect? slow to safe speed before entering, then accelerate slightly through the curve. The emergency line valve open and release air C. closed, You can release the dolly brakes by: "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. If the converter dolly is close to your semitrailer, you should wheel it into position? D A. you can steer more quickly and safely if you hold the wheel with one hand A. brake and downshift in a curve 9. Explore now! New! If spare tire is on converter gear (dolly), make sure it is secured. 0000004689 00000 n The road is dry and the visibility is good. The lightest trailer Ensuring the safety of the public starts with a thorough By clicking on "Sign Up", you agree to our Terms of Use and Privacy Policy. how can you be sure you supplied air to a second trailer? 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. The shut off valves prevent air from going any further. These mirrors: Make things seem smaller and further away than they really are. Question 3 Explanation: All of the above. and ensuring it is secure. 0000008894 00000 n Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). For emergency braking you should: which of these statements about emergency steering is true? B. for doubles and triples, the fifth wheel should be all the way towards the tractor You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. you are driving on a slippery road during the day. C If one air system is very low on pressure _______. Open, free A vehicle transporting hazardous materials is required to display placards where? The Verge logo. What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? you should keep atleast __seconds of space ahead of you. Pull gently against them in a low gear to make sure the brakes work. Submit your email at the end of the test. Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. When uncoupling a rear trailer, your rig should be parked in a straight line on? A connection device of one axle used to disconnect a semitrailer combination vehicle 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. What types of trailers can get stuck on raised crossings? All other trailer air functions use the emergency line. fifth wheel, so trailer is raised slightly when dolly is pushed under it. You are doing a walk around inspection of a double or triple trailer rig. Like a trailer, a dolly equipped with ABS will have a yellow indicator light on the left side. You wish to turn right from one two-lane, two-way street to another. b. cell utilize the brakes. At section 2 downstream, the speed is 519 m/s. 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 . Make sure trailer height is correct. You are driving with double trailers and must use your brakes to avoid a crash. If loading fails, click here to try again. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. Air pressure is sent from the air tanks to the brakes by relay valves. That there is no space between upper and lower fifth wheel. Pull gently against the pin of the second trailer. A You can reset the test and retake it as needed. C. use stab or controlled braking, Which of these is true? S-cam brakes are the most common style brakes on large trucks today. Push the brake pedal as hard as you can and hold it there How do you check to make sure trailer height is correct before coupling? 27. However there are some states that allow doubles that are each 48 feet in length. rear brakes will not work properly. A. Open the shut-off valves at the rear of the last trailer and listen for air flow. The coupling between a rear trailer and a dolly should have a space between the upper and lower fifth wheels of? then there is a problem with the ABS system. Check them all. Safety chains secured to trailer (s). 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. Which of these statements about managing space to the sides is true? Also, this page requires javascript. Should the shut-off valves on the rear of the last trailer be open or closed? 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). When does the "driver's manual" advise disconnecting the steering axle brakes to help If this lamp is illuminated and does not go out, D ADVERTISEMENT ADVERTISEMENT These mirrors: make things seem smaller & further away then they really are. The best way to keep brakes from getting to hot while going down long grades is to: Go slow and use only light, steady pressure on the brakes. Doubles and triples must be driven very smoothly to avoid rollover or jacknife. The rear trailer of a triple Safety should never take second place, so know your stuff! C. the service brakes slowly move to the fully applied position, Some large trucks have converted or "spot" mirrors. 0000002636 00000 n Shut-off valves (at rear of trailers, in service and emergency lines): When pulling doubles or triples, what is important to know about the order of the trailers? Please wait while the activity loads. 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. What does the drivers manual say about how much space you should keep ahead of your truck? Go to the rear of second trailer and open the emergency line shut-of valve. 0000001775 00000 n 8. This would be very dangerous. C. back up slightly and make a visual check of the coupling, You are driving with double trailers and must use your brakes to avoid a crash. 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. Why should you not use the trailer hand valve while driving? B. You can test that air is flowing to all trailers by opening? The application only takes one minute. 0000008166 00000 n Converter dollies have spring brakes. The shortest trailer To check if the converter dolly is securely coupled to the rear trailer you should: Pull gently against the pin of the second trailer. What is a converter dolly? 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. Either the front or the rear brakes will not work properly or fully. with the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. Safety chains should be secured to trailer(s). 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested The dolly will have a yellow lamp on the drivers (left) side. Allow much more space than is needed for ideal driving condition. 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. Which of the following is true about loading cargo into double or triple trailers? How do you check to make sure trailer height is correct before coupling? 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 That split second that you release the brakes will allow them to match the vehicles road Terms in this set (43) Converter dollies are used to connect: A tractor-trailer combination to another trailer. B. allow one vehicle length for every 10,000 lbs of gross vehicle weight the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. Their drawbars differentiate them. Why should you use chocks when parking a trailer without spring brakes? Which of these is most likely too occur? The pintle hook? 1/32 to 3/32 of an inch. C Open the emergency line shut-off valve at the rear of the last trailer. Join 50,000+ users around America to get your Commercial Driver License today! The heaviest trailer Typically depends on the axle count. B. pull gently against the pin of the second semitrailer 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?
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