Question 3 Explanation: All of the above. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. Also, this page requires javascript. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. When uncoupling doubles or triples, what is important to know about unlocking the pintle hook? A. use light, steady pressure on the brake pedal retrovirus $_____________________________$. The number of correct answers. You should keep at least ___ seconds of space ahead of you. 7. B. use only the trailer brakes For emergency braking you should: You are doing a walk around inspection of a double or triple trailer rig. 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? The pintle hook? Ship to Store. If you are only pulling one trailer, make certain the valve is fully in the closed position or it will leak air out of the air system. 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? 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. True! High Road 2.0! Open the emergency line shut-off valve at the rear of the last trailer. These mirrors: make things seem smaller & further away then they really are. you are visually checking the coupling of a converter dolly to the rear trailer. 2 You open the emergency line shut-off valve at the rear of the last trailer and hear air escaping. However there are some states that allow doubles that are each 48 feet in length. speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. You are driving a 100 foot twin trailer combination at 50 mph. If there is a trailer you are driving at night and you must dim your headlights for traffic. What three methods can you use to secure a second trailer before coupling? Seriously! At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. 0000009577 00000 n safe speed would be 40 MPH. A converter dolly is still under the second trailer when you unlock the pintle hook. 2023 PA Doubles - Triples CDL Practice Test 3 - CristCDL.com Converter dollies have spring brakes. Doubles and triples must be driven very smoothly to avoid rollover or jacknife. What three methods can you use to secure a second trailer before coupling? Correct answer percentage. 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. 0000004668 00000 n Closed, latched How can you test that air flows to all trailers? Go to Section 4: Other Topics This question is in Section 4: Other Topics of our CDL Test Guide. you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. 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. Therefor, if there is a major leak in your service line, you may not know it until you try to use the service brake. You are driving a 100-feet truck with double trailers at 30 mph. While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. You must steer gently when pulling trailers. 0000010783 00000 n X D5^4aX{Ka)nT)Ac g" endstream endobj 58 0 obj 108 endobj 23 0 obj << /Type /Page /Parent 19 0 R /Resources 24 0 R /Contents [ 31 0 R 33 0 R 35 0 R 46 0 R 48 0 R 50 0 R 52 0 R 54 0 R ] /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 >> endobj 24 0 obj << /ProcSet [ /PDF /Text ] /Font << /F2 37 0 R /F4 40 0 R /TT2 28 0 R /TT4 26 0 R /TT6 42 0 R /TT8 44 0 R >> /ExtGState << /GS1 55 0 R >> /ColorSpace << /Cs5 29 0 R >> >> endobj 25 0 obj << /Type /FontDescriptor /Ascent 905 /CapHeight 0 /Descent -211 /Flags 32 /FontBBox [ -222 -325 1072 1037 ] /FontName /ArialMT /ItalicAngle 0 /StemV 0 >> endobj 26 0 obj << /Type /Font /Subtype /TrueType /FirstChar 32 /LastChar 121 /Widths [ 278 0 355 0 0 0 0 191 333 333 0 0 278 333 278 278 556 556 556 556 556 556 556 556 556 556 278 0 0 0 0 556 0 667 667 722 722 667 611 778 722 278 0 667 556 833 722 778 667 0 722 667 611 722 0 944 0 667 0 0 0 0 0 0 0 556 556 500 556 556 278 556 556 222 222 500 222 833 556 556 556 556 333 500 278 556 500 722 500 500 ] /Encoding /WinAnsiEncoding /BaseFont /ArialMT /FontDescriptor 25 0 R >> endobj 27 0 obj << /Type /FontDescriptor /Ascent 905 /CapHeight 0 /Descent -211 /Flags 96 /FontBBox [ -262 -325 1082 1025 ] /FontName /Arial-ItalicMT /ItalicAngle -15 /StemV 0 >> endobj 28 0 obj << /Type /Font /Subtype /TrueType /FirstChar 32 /LastChar 118 /Widths [ 278 0 0 0 0 0 0 191 0 0 0 0 0 333 278 278 556 556 556 556 556 556 556 556 0 0 0 0 0 0 0 0 0 0 0 722 722 0 0 0 0 0 0 0 0 833 0 0 667 0 0 0 611 0 0 0 0 0 0 0 0 0 0 0 0 556 556 500 556 556 0 556 0 222 0 0 222 833 556 556 556 0 333 500 0 556 500 ] /Encoding /WinAnsiEncoding /BaseFont /Arial-ItalicMT /FontDescriptor 27 0 R >> endobj 29 0 obj [ /CalRGB << /WhitePoint [ 0.9505 1 1.089 ] /Gamma [ 2.22221 2.22221 2.22221 ] /Matrix [ 0.4124 0.2126 0.0193 0.3576 0.71519 0.1192 0.1805 0.0722 0.9505 ] >> ] endobj 30 0 obj 638 endobj 31 0 obj << /Filter /FlateDecode /Length 30 0 R >> stream If it goes low enough, the trailer emergency brakes will come on. Pull gently against the pin of the second trailer. You can find it here: High Road 2.0. C 3. 0000008166 00000 n Open, free Double/Triple Flashcards | Quizlet When the road is slippery B. you should avoid traveling next to others whenever possible Pickup at South Loop. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. 8. Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? you should avoid traveling next to others when possible. when driving a truck with more than one trailer, which trailer should be first behind the truck? 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. Close the emergency line shut-off valve at the rear of the trailer. These trailers have no parking brake. will have a lamp on the drivers side. This section explains how important it is to be careful when driving with more than one trailer, how to couple and uncouple correctly, and about inspecting doubles and triples carefully. 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. You should keep at least ____ seconds of space ahead of you. Each trailer and converter dolly has one or more air tanks. Disconnect the glad-hand at the front of the first trailer and listen for air flow. None 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. B A. release the spring brakes and check for movement Doubles and triples must be driven very smoothly to avoid rollover or jackknife. True! A dolly should be pulled out from a rear trailer using? What does the Driver's manual say about how much space you should keep ahead of your truck? Open the emergency line shut-off valve at the rear of the last trailer. There is no obligation whatsoever. The pressure in the service line is controlled by the brake pedal and the trailer hand brake. Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? 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 For emergency braking you should: which of these statements about emergency steering is true? 0000005664 00000 n All material on this website is copyrighted. You should keep at least ____ seconds of space ahead of you. D A D your vehicle is so long that you must swing wide to make a turn. A However, converter dollies and trailers built before 1975 are not required to have spring brakes. 5. you should check the trailer height before connecting a converter dolly to a second or third trailer. 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 B. for doubles and triples, the fifth wheel should be all the way towards the tractor The dolly tow bar may flip up causing bodily injury and making it very difficult to %PDF-1.2 % 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. 5. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. 0000007508 00000 n C Dobles - Triples Pruebas de prctica 3 - NJ 2023 - CristCDL.com These dollies will have a yellow lamp on the left side of the dolly. 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? A. open 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 The shut off valves prevent air from going any further. These valves permit closing the air lines off when another trailer is not being towed. which of these statements about the handling of doubles and triples is true ? Double and Triples Endorsement Flashcards The dolly tow bar may fly up, possibly causing injury, and making it very difficult to C A) closed . 0000003240 00000 n securely fastened. Slow to the safe speed before entering, then accelerate slightly through the curve. 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. 0000008894 00000 n 2023 WV Doubles - Triples CDL Practice Test 1 - CristCDL.com and the converter dolly air tank drain valve should be _____. You should NOT: You are driving a set of doubles and a set of trailer wheels goes into a skid. Each trailer and converter dolly has one or more air tanks. Why should you not use the trailer hand valve while driving? B. the emergency line valve open and release air should remain in the closed position. Doubles and triples are more likely to turn over than other combination vehicles because of the "crack- the-whip" effect. 0000001162 00000 n 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. How can you be sure you supplied air to a second trailer? Air pressure is sent from the air tanks to the brakes by relay valves. _______ should be tested with the hand valve but controlled in normal operation with the foot pedal. Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. 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? If spare tire is on converter gear (dolly), make sure it is secured. The converter dolly air tank drain valve on coupled double/triple trailers should be: Closed. For emergency braking you should: If you feel You can test that air is flowing to all trailers by opening? On a triple combination, the shutoff valves on the rear of the last trailer should be? Charge the system and pump the brakes with the window down. locked . Which of the following must be connected when coupling tractor to trailer or trailer to trailer? 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. Doubles Triples Endorsement Test Flashcards | Quizlet 0000005554 00000 n inspection of all equipment. When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples. to do this without wheel chocks you should: supply air to the trailer air system with the tractor and then disconnect the emergency line. 0000006015 00000 n Make sure you have large enough gaps before entering or crossing traffic. When you do this, you should hear: Leave a Reply Cancel reply - Free CDL Practice Tests 2022 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 then there is a problem with the ABS system. C. posted speed limits on curves are safe for all trucks, Empty trucks: You must steer gently when pulling trailers. 0000009556 00000 n 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. You will speak with recruiters today. during normal operation the brakes of the double/triple trailer are controlled by : which of these will result in the best control on curves? Take special care when pulling two and three trailers. Types of converter dollies. Page 7-6 Commercial Driver's Manual/2.0 = Be sure air lines are supported and glad hands are properly connected. True! With the red knob pushed in on the tractor dash, the service line should have air in it. Describe what the trailer air supply control does. That there is no space between upper and lower fifth wheel. Use only the trailer brakes Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. CDL Practice Tests 2023 - Doubles And Triples Blue is used for the service lines, and red for the emergency (supply) lines. Once you are finished, click the button below. When you go to the rear of the last trailer, what should you do to complete this check? Should the shut-off valves on the rear of the last trailer be open or closed? Stay up to date on truck driving industry news. For emergency braking you should: Use controlled or stab braking Converter dollies: Often do not have spring brakes The crack the whip effect that troubles trucks with trailers. air throughout the system. The lightest trailer Allow much more space than is needed for ideal driving condition. Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! fifth wheel, so trailer is raised slightly when dolly is pushed under it. Their drawbars differentiate them. Florida CDL Handbook | FL CDL Handbook Coupling & Uncoupling for King pin. Your vehicle is so long that you must swing wide to make the turn. Once you have coupled your rear trailer, you should test the coupling by? If one air system is very low on pressure _______. Doubles and triples are more likely to overturn than other combination vehicles because of the whip cracking effect. D D. Make sure the spare tire is secured, if it has one. The coupling between a rear trailer and a dolly should have a space between the upper and lower fifth wheels of? Any time you have to Chock the tires, park on level ground and charge the trailer air tank if it does D This will prevent water and dirt from getting into the coupler and the air lines. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? The converter dolly air tank drain valve on coupled double/triple None of the above, 5. Make sure to visually inspect the fifth wheel and that the locking mechanism is and ensuring it is secure. C Follow the procedures described later in this section. There are two types of converter dollies. A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. There is no obligation whatsoever. How should the converter dolly air tank drain valve on coupled double They are not only longer, but also need more space because they cannot be turned or stopped suddenly. C. closed; unlatched, Which of these will result in the best control on a curve? 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. If this activity does not load, try refreshing your browser. The dolly will have a yellow lamp on the drivers (left) side. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space Hit the article to see the way to back up your trailer like a pro! 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested 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. Why should you check for when inspecting the converter dolly? The road is dry and visibility is good. utilize the brakes. 60607. To do this without wheels chocks you should: Supply air to the trailer air system with the tractor and then disconnect the emergency line. Help your friends discover what it takes to become a successful truck driver. Those that do not have spring brakes have emergency brakes that work from the air stored in the trailer air tank. B 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. Slow to a safe speed before entering the curve, then coast through the curve. B. johnson bar door. You should be sure the converter dolly air tank drain . What is a converter dolly? S-cam brakes are the most common style brakes on large trucks today. 6. If the fifth wheel on a coupling is too far forward, the tractor frame may hit? To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: Closed. You should be sure the converter dolly air tank . 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: