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

10 B 2 The road is dry and visibility is good. This has the same value as the %%WRONG_ANSWERS%% Variable on the Final Screen. Any time you have to %PDF-1.2 % Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. 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. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. None of the above, 2. You MUST have air all the way to the back for all the brakes to work. You can test that air is flowing to all trailers by opening? unsafe slow down even further, or better yet, find a safe haven and park until the Closed, free, 8. When you're finished, check your score and results. B 4. The road is dry and visibility is good. Refers to pulling two trailers at the same time, otherwise known as "pups" or "pup trailers" because they're only about 28 feet long. Converter dolly air tank drain valve: CLOSED. Calculate the voltage gain of each. Make sure trailer height is correct. Converter dollies: The pintle hook should always be secure when the vehicle is in motion. Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. There is no obligation whatsoever. 0000001107 00000 n Join 50,000+ users around America to get your Commercial Driver License today! How much space should be between the upper and lower fifth wheel? However, converter dollies and trailers built before 1975 are not required to have spring brakes. NPT thumbscrew style design enables easy installation. 5. When connecting the glad hands, press the two seals together with the couplers at a 90-degree angle to each other. 11 That there is no space between upper and lower fifth wheel. and ensuring it is secure. 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? Mar 2 - Mar 3. 2) the second test is to go out to the trailer to ensure that the parking brakes have indeed applied. 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? the rig will continue moving in a straight line no matter how much the steering wheel is turned. What do you check when making a visual check of coupling? You should check the height of the trailer before connecting a converter dolly to a second or third trailer. Leave the emergency line shut-off valve closed and open the service line valve. The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. By clicking on "Sign Up", you agree to our Terms of Use and Privacy Policy. If you crossed the air lines, you could drive away, but you would not have trailer brakes. Provides a snug fit to eliminate unwanted seepage of air or water. 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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. 0000008187 00000 n The word part ferrit- means: 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. paramount to safe driving. A. air escape from the open valve Some vehicles have dead end or dummy couplers to which the hoses may be attached when they are not in use. 21 0 obj << /Linearized 1 /O 23 /H [ 1162 213 ] /L 29759 /E 11109 /N 7 /T 29221 >> endobj xref 21 38 0000000016 00000 n In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. Also, this page requires javascript. Trailer Air Tanks And Shutoff Valves - TruckingTruth 0000008166 00000 n If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. A truckers workspace is a small moving office Read More. 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. 0000010285 00000 n To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? A. use a low gear Leave a Reply Cancel reply - Free CDL Practice Tests 2022 7. d. protein. How do you check to make sure the trailer height is correct before coupling? D 2022 DE Doubles - Triples CDL Quick Review 1 - CristCDL.com B. closed The pressure in the service line is controlled by the brake pedal and the trailer hand brake. Ship to Store. Try our free CDL Doubles and Triples Test Question and Answers Quiz online. fumoto drain valve. The crack the whip effect will topple the rear trailer first. 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. Closed, latched Why should you not use the trailer hand valve while driving? They are filled by the emergency (supply) line from the tractor. Pickup at South Loop. Locking jaws closed on What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly? will have a lamp on the drivers side. Any vehicle required by federal regulations to be placarded while transporting hazardous materials. Any trailer with a reduced ground clearance Ensuring the safety of the public starts with a thorough B. slightly raised When you do this, you should hear: Ais escape from the open valve. How much space should be between the upper and lower fifth wheels? 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 Which of these is most likely to occur? Use the dummy couplers when the air lines are not connected to a trailer. At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. 5. How can you test that air flows to all trailers? While doing a walkaround inspection of a double or triple, the converter dolly air tank drain valve should be _____, and the pintle hook should be _____. the trailer height is right when: the trailer will be raised slightly when the converter dolly is backed under it. The dolly tow bar may flip up causing bodily injury and making it very difficult to For emergency braking you should: The application only takes one minute. axle will have spring brakes due to the weight of the unit. There is no obligation whatsoever. B. for doubles and triples, the fifth wheel should be all the way towards the tractor 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. 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. They are not only longer, but also need more space because they cannot be turned or stopped suddenly. 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. Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. C safe speed would be 40 MPH. D. Make sure the spare tire is secured, if it has one. Allow much more space than is needed for ideal driving condition. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? Safety chains secured to trailer (s). You should be sure the converter dolly air tank drain valves are _______ & the pintle hook is __________. 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. Unless you are draining the condensation out of the air tank, then the drain valve But the brakes will hold only as long as there is air pressure in the trailer air tank. You shouldn't stop braking. kingpin. Air pressure is sent from the air tanks to the brakes by relay valves. 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. 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? You are driving a 100 foot twin trailer combination at 50 mph. For emergency braking you should: A Push the brake pedal as hard as you can and hold it there B C. fully raised, Which of these statements about speed management and braking is true? A. always keep your vehicle to the right side of your lane Go to Section 4: Other Topics This question is in Section 4: Other Topics of our CDL Test Guide. 0000005554 00000 n The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. 8. Older trailers do not have spring brakes. Trailer Air Tanks And Shutoff Valves - Page 50. behind the shut-off valve then they need to remain open. retrovirus $_____________________________$. Make sure you do not get in a spot you cannot pull straight through. Select the answer that correctly completes each statement. D The application only takes one minute. You should keep at least ____ seconds of space ahead of you. A 360 degree area of awareness is If spare tire is on converter gear (dolly), make sure it is secured. When does the Driver's manual say you should disable the steering axle brake? The weight of the individual trailers will have no noticeable effect on the handling of the vehicle, The weight of all trailers should be nearly the same, within 2% of each other. We are an independent company focused on providing valuable motor vehicle and permit practice test information. 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. If you're only pulling one trailer, the shut off valves should always be closed or else the air will simply escape out the back of the trailer. Dont hesitate to take advantage of our practice tests in each category specific to your needs. Do converter dollies have spring brakes? Does a converter dolly have a separate air tank? - Wisdom-Advices A. opening the air tank petcock The road is dry and visibility is good. When you do this, you should hear: Once you have coupled your rear trailer, you should test the coupling by? Please use the form below to contact our customer service or sales team. How do you know if your converter dolly is equipped with antilock brakes? Finsbury Pump Systems 400l (Single Stage) 5.5hp Honda Gx Petrol Engine 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. Hook dolly to front trailer. C. 3, You are doing a walk around inspection of a double or triple trailer rig. Doubles and triples must be driven very smoothly to avoid rollover or jackknife. When checking the coupling system, make sure that the locking jaws are around the shank of the. Number of wrong answers. rear trailer. If this lamp is illuminated and does not go out, This means. Each trailer and converter dolly has one or more air tanks. You are driving with double trailers and must use your brakes to avoid a crash. 0000010705 00000 n Disconnect the glad-hand at the front of the first trailer and listen for air flow. you are driving a 100ft truck eith double trailers at 50mph. The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. You should be sure the converter dolly air tank drain . C Which of the following will occur? Pull gently against them in a low gear to make sure the brakes work. The rear trailer of a triple to do this without wheel chocks you should: supply air to the trailer air system with the tractor and then disconnect the emergency line. mTouch Quiz will automatically populate the fields below. what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? Delivering to. B. What's a converter dolly? CDL Doubles and Triples Test Question and Answers The dolly tow bar may fly up These valves permit closing the air lines off when another trailer is not being towed. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space A. countersteer If the spring brakes do not release when you push the trailer air supply control, check the air line connections. 1/4 in. Open the shut-off valves at the rear of the last trailer and listen for air flow. 0000003060 00000 n Submit your email at the end of the test. which of these is not a good thing to do when driving on slippery roads? You have not finished your quiz. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. 7.3 Inspecting Doubles and Triples = Additional Things to Check During a Walkaround Inspection. How many different ways of coupling and uncoupling trailer combinations are there? Question 4. You are driving with double trailers and must use your brakes to avoid a crash. your vehicle is so long that you must swing wide to make a turn. None which of these statements about the handling of doubles and triples is true ? CDL Doubles & Triples Practice Test 3 - Classic Mode - Trucker Country This has the same value as the %%TIME_USED%% Variable on the Final Screen. We'll help you make the right choices and prepare for a great start to your trucking career. 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. be coupled to the rear of a tractor-trailer combination forming a hexagon bottom rig, A coupling device of one or two axles and a fifth wheel by which a semitrailer can be Doubles and triples are more likely to turn over than other combination vehicles because of what effect? To check air flows to all trailers, you should let air pressure reach normal then? A connection device of one axle used to disconnect a semitrailer combination vehicle What should you check for when inspecting a converter dolly? The pintle hook? True! Some do. What should you check for when inspecting the converter dolly? A thorough pre-trip inspection should catch any major service line leaks before you begin your trip. In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. You should keep at least ____ seconds of space ahead of you. B Doubles and triples are more likely to turn over than other combination vehicles because of the "crack-the-whip" effect. 0000001775 00000 n Ideal for replacing a worn, leaky drain valve on a compressor. To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and Hit the article below to see specific information about AOBRDs! DMV Doubles Triples Practice Test | CDL Knowledge Do converter dollies have spring brakes? 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. when does the drivers manual say you should disable the steering axle brakes? When entering a roundabout, a driver must yield the right-of-way to drivers already in the roundabout and obey all traffic signs. The service brakes slowly move to the fully applied position We wish you the best of luck in your endeavors and are pleased to be of assistance. B. pull gently against the pin of the second semitrailer 0000003261 00000 n 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. Visually check to make sure that the rear trailer is slightly lower than the center of the B The number and size of air tanks varies among vehicles. 0000003977 00000 n Opening the shut off valves on the rear most trailer will ensure the lines are flowing B. are the easiest to stop since there is no shifting cargo This would be very dangerous. You should keep at least ___ seconds of space ahead of you. The shut off valves, when in the open position, allows air to flow out to another trailer. 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? For emergency braking you should: May have poor traction due to bouncing and wheels lockup. Calculate the Mach number at section 2. Each tank has a drain valve on it, and you should drain each tank every day. 0000006836 00000 n B True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. A vehicle transporting hazardous materials is required to display placards where? A some large trucks have curved (convex or spot) mirrors. To check if the converter dolly is securely coupled to the rear trailer you should: Pull gently against the pin of the second trailer. For emergency braking you should: The crack the whip effect that troubles trucks with trailers. 2. You are driving a 100-feet truck with double trailers at 30 mph. B. the emergency line valve open and release air How do you know if your converter dolly is equipped with antilock brakes? Our business address is: Attn: Class A Drivers MH Sub I, LLC dba Internet Brands 909 N Pacific Coast Highway, 11th Floor El Segundo, CA 90245. Locking jaws closed on Correct answer percentage. King pin. Which f these will result in the best control on curves? Doubles and triples must be driven very smoothly to avoid rollover or jackknife. There is more chance for skids and loss of traction. Before you can supply air to the air tanks of a second trailer you need to. 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 1. 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. In the coupling system, the locking jaws should be fixed around? . 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. Seriously! B. open; latched 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? These mirrors: make things seem smaller & further away then they really are. Allow more following distance. Study section 6.2 if you can't answer all of these questions. Which the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. Page 1 - Doubles/Triples Test Study Guide for the CDL None of the above, 5. Take special care when pulling two and three trailers. What is the most common foundation brake found on heavy vehicles? you should keep atleast __seconds of space ahead of you. Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. 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. Doubles/Triples Air Brake Check - digital.ncdcr.gov It is very important to keep the air supply clean. True! TestPermit.com provides free unofficial review materials for a variety of exams. A. hand valve When checking the fifth wheel, you should make sure that it has enough? Doubles Triples Endorsement Test Flashcards | Quizlet You are driving a triple trailer and there is a loss of air pressure in the emergency line. Terms in this set (43) Converter dollies are used to connect: A tractor-trailer combination to another trailer. Which of these is the correct answer? Follow the procedures described later in this section. you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. 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 valves are _______ and the pintle hook is _____. B. slow to a safe speed before entering the curve, then accelerate slightly through it Which diagram shows the best way to turn? 0000007487 00000 n The dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. You can reset the test and retake it as needed. When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? The coupling between a rear trailer and a dolly should have a space between the upper and lower fifth wheels of? Any trailer, 7. The rear trailer of a double If you feel second trailer will be connected, The dolly will have a yellow lamp on the left side, The dolly will have a yellow lamp on the right side, The dolly will have a red lamp on the left side, The dolly will have a red lamp on the right side. When uncoupling a rear trailer, you should remove some weight from the dolly by? The rear trailer does not have shut-off valves. Have little braking power because they are small Dobles - Triples Pruebas de prctica 3 - NJ 2023 - CristCDL.com If the fifth wheel on a coupling is too far forward, the tractor frame may hit? The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples. Only trailers designed to be pulled with another trailer behind it will have a shut off valve. What is one function of the tractor protection valve? Doubles and triples are more likely to turn over than other combination vehicles because of the "crack- the-whip" effect. Double and Triples Endorsement Flashcards 2003-2023 Chegg Inc. All rights reserved. Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? The couplers have a rubber seal that prevents air from escaping. 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. PDF Doubles and triples 1. The stopping distance for a tractor trailer Why should you use chocks when parking a trailer without spring brakes? True or False? When driving a double or triple trailer, greater care must be given to. The total number of questions. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. When you do this, you should hear: you are driving with double trailer and must use your brakes to avoid a crash. You should hear air escaping, showing the entire system is charged. What do you check when making a visual check of coupling? B. restore traction to the tires Then, the air loss from the leak will lower the air tank pressure quickly. [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 coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. B 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. 0000005345 00000 n 0000004689 00000 n when driving a truck with more than one trailer, which trailer should be first behind the truck? C 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 Charge the system and pump the brakes with the window down. 0000006383 00000 n Open the emergency line shut-off valve at the rear of the last trailer. Blue is used for the service lines, and red for the emergency (supply) lines. and the converter dolly air tank drain valve should be _____. 1 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. B. you can almost always stop more quickly than you can turn All rights reserved Site Map. 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. Why is there still destructive interference? All ABS equipped units Never, 9. Time used (Requires timer add on). They are filled by the emergency (supply) line from the tractor. C you should check the trailer height before connecting a converter dolly to a second or third trailer. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. D You are visually checking the coupling of a converter dolly to the rear trailer. The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. slow to safe speed before entering, then accelerate slightly through the curve. B. 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 Which of these is NOT a good thing to do when driving on slippery roads? 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. CDL License Requirements State By State. kingpin, That there is grease between upper and lower fifth wheel. front of the second trailer. Which of the following must be connected when coupling tractor to trailer or trailer to trailer?