will have a lamp on the drivers side. How To Use Cruise Control Effectively As A Truck Driver. Because of this, which of the following vehicle parts is most likely to tip over? 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. The driver will be required to complete this requirement in three eight hour shifts. 7.3 Inspecting Doubles and Triples = Additional Things to Check During a Walkaround Inspection. Florida CDL Handbook | FL CDL Handbook Coupling & Uncoupling for a. blood Select the answer that correctly completes each statement. Trailer Air Tanks And Shutoff Valves - Page 50. These mirrors: make things seem smaller & further away then they really are. Finsbury Pump Systems 400l (Single Stage) 5.5hp Honda Gx Petrol Engine What does the drivers manual say about how much space you should keep ahead of your truck? Double and Triples Part 1 Flashcards - flashcardmachine.com Sometimes, metal tags are attached to the lines with the words service and emergency stamped on them. Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). Pickup at South Loop. C. slow to a safe speed before entering the curve, then coast through it, Which of these is NOT a good thing to do when driving on slippery roads? Pull gently against the pin of the second trailer. You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. You are driving with more than one trailer. D Open. D Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. Sketch the shape of the passage between sections 1 and 2. Inspecting Doubles And Triples | High Road Online CDL Training Our normal business hours are Monday-Friday 8 a.m. to 5 p.m. (Pacific Time). B. you should avoid traveling next to others whenever possible They are filled by the emergency (supply) line from the tractor. Describe what the trailer air supply control does. Once that's complete, then its an easy push back and the 0000001582 00000 n Closed, latched B. releasing the pintle hook Any time you have to 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. You MUST have air all the way to the back for all the brakes to work. Remember however, that is just a suggestion. Slow to a safe speed before entering the curve, then coast through the curve. Each trailer and converter dolly has one or more air tanks. The emergency brakes come on whenever the air supply knob is pulled out or the trailer is disconnected. Safety should never take second place, so know your stuff! B If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? If your tractor protection valve doesn't work properly, then if an air hose starts to leak what could happen? 7. A green traffic light allows the driver to go. The last trailer in a combination is most likely to turn over. C. 3, You are doing a walk around inspection of a double or triple trailer rig. 0000003240 00000 n how much space should be between the upper and lower fifth wheel? C. When coupling doubles and triples, be sure that the pintle-eye of the dolly is in place in the pintle hook of the trailer, You are driving on a slippery road during the day. 0000001162 00000 n When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? Make sure to visually inspect the fifth wheel and that the locking mechanism is Why should you use chocks when parking a trailer without spring brakes? 12, 3. Doubles and triples are more likely to overturn than other combination vehicles because of the whip cracking effect. Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. 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. 0000001107 00000 n 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. B. for doubles and triples, the fifth wheel should be all the way towards the tractor 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? Eventually, the air will leak away, and then there will be no brakes. open, closed, closed: Term. 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. B. A. opening the air tank petcock "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. We have a new version of this program. 2. You must steer gently when pulling trailers. What should you check for when inspecting a converter dolly - Answers [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. If you do, there is a problem. The coupling between a rear trailer and a dolly should have a space between the upper and lower fifth wheels of? CDL Doubles & Triples Practice Test 3 - Classic Mode - Trucker Country 10. A converter dolly is still under the second trailer when you unlock the pintle hook. Use the engine brake or speed retarder. Which of these is the correct answer? recouple. A. allow "much more space" than is needed for ideal driving conditions This has the same value as the %%WRONG_ANSWERS%% Variable on the Final Screen. kingpin, That there is grease between upper and lower fifth wheel. Doubles/Triples Endorsement Flashcards | Quizlet This has the same value as the %%TOTAL%% Variable on the Final Screen. Doubles and triples are extremely prone to control issues and must be C when driving a truck with more than one trailer, which trailer should be first behind the truck? 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? Stay up to date on truck driving industry news. - Converter dolly air tank drain valve: CLOSED. Study section 6.2 if you can't answer all of these questions. Allow much more space than is needed for ideal driving condition. if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. Some areas of concern are discussed below. Open the emergency line shut-off valve at the rear of the last trailer. B. allow one vehicle length for every 10,000 lbs of gross vehicle weight Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? 0000003977 00000 n This has the same value as the %%SCORE%% Variable on the Final Screen. After 15 years on the road I wanted to help people understand the trucking industry and everything that came with the career and lifestyle of an over the road trucker. 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. You can reset the test and retake it as needed. you are doing a walkaround inspection of a double or triple trailer rig. D b. cell Compressed air usually has some water and some compressor oil in it. Push the brake pedal as hard as you can and hold it there PDF Doubles and triples 1. The stopping distance for a tractor trailer You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. Seriously! A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. Email Updates When New Articles Are Posted. The shut off valves prevent air from going any further. You should keep at least ___ seconds of space ahead of you. Often do not have spring brakes They provide the air pressure used to operate trailer brakes. 0000006383 00000 n Calculate the voltage gain of each. Therefore, look far ahead so you can slow down or change lanes gradually when necessary. Double and Triples Endorsement Flashcards Page 1 - Doubles/Triples Test Study Guide for the CDL You are doing a walk around inspection of a double or triple trailer rig. A 360 degree area of awareness is To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space The A-dolly has a single drawbar with a single, centered hitching point. You may be timed. 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. Some vehicles have dead end or dummy couplers to which the hoses may be attached when they are not in use. What do you check when making a visual check of coupling? It is important to check the height of the trailer before connecting a converter dolly to a trailer. B. slightly open retrovirus $_____________________________$. On the first trailer in a set of doubles? All ABS equipped units When uncoupling the converter dolly Why should you never unhook the Doubles and triples must be driven very smoothly to avoid rollover or jacknife. Free CDL - Doubles and Triples Flashcards | Quizlet Air pressure is sent from the air tanks to the brakes by relay valves. 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. locked . A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. Does a converter dolly have a separate air tank? - Wisdom-Advices 1/32 to 3/32 of an inch. 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. For emergency braking you should: D 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. If loading fails, click here to try again. 9. King pin. 0000010306 00000 n When driving a double or triple trailer, greater care must be given to. Ensuring the safety of the public starts with a thorough inspection of all equipment. B. johnson bar air throughout the system. On double and triple combinations, you must make sure that which of these is secure? When does the "driver's manual" advise disconnecting the steering axle brakes to help the fifth wheel, so trailer is raised slightly when dolly is pushed under it. C. open, except the one connected to the rear trailer should be closed, During normal operation the brakes on double and triple trailers are controlled by the: Pull gently against the pin of the second trailer. Visually check to make sure that the lead trailer is slightly higher than the center of Leave the emergency line shut-off valve closed and open the service line valve. B. you can almost always stop more quickly than you can turn What does the Driver's manual say about how much space you should keep ahead of your truck? the road is dry & visibility is good. What value of channel width must the design use? 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. Hazardous materials must be placarded on all four sides of EACH Trailer. We wish you the best of luck in your endeavors and are pleased to be of assistance. There is no obligation whatsoever. B CDL Practice Tests 2023 - Doubles And Triples 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. PDF Section 7: Doubles and Triples - CDL Study When entering a roundabout, a driver must yield the right-of-way to drivers already in the roundabout and obey all traffic signs. 0000006015 00000 n There is no requirement or exact standard for color coding. They are filled by the emergency (supply) line from the tractor. can and will get stuck on a raised railroad crossing. If there is Open the emergency line shut-off valve at the rear of the last trailer. Air valves should be closed on all trailers, Air valves should be open on all trailers, Rear of front trailers: closed, rear of last trailer: open, Rear of front trailers: open, rear of last trailer: closed. 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. 2003-2023 Chegg Inc. All rights reserved. When checking the fifth wheel, you should make sure that it has enough? 0000009556 00000 n When checking your air lines, they must be secure and? A. you are driving a 100ft truck eith double trailers at 50mph. Which is most likely to tip over: Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. The pressure in the service line tells how much pressure the relay valves should send to the trailer brakes. Please visit using a browser with javascript enabled. Should I Be A Truck Driver? 0000003261 00000 n 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 checking the coupling system, make sure that the locking jaws are around the shank of the. 0000005554 00000 n True or False? C C. use controlled or stab braking, The best way to stop any skid is to: Do converter dollies have spring brakes? 1. Safety fail-safe features of a tractor-trailer converter dolly. Never unlock the pintle hook with the dolly still under the rear trailer. Page 7-6 Commercial Driver's Manual/2.0 = Be sure air lines are supported and glad hands are properly connected. 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. slow to safe speed before entering, then accelerate slightly through the curve. Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. 2023 WV Doubles - Triples CDL Practice Test 1 - CristCDL.com A dolly has lights, air tanks, air relays, air lines, air brakes, ABS, electrical connections, etc. The rear trailer does not have shut-off valves. The pintle hook should always be secure when the vehicle is in motion. 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. They provide the air pressure used to operate trailer brakes. C. closed; unlatched, Which of these will result in the best control on a curve? the trailer height is right when: the trailer will be raised slightly when the converter dolly is backed under it. Dobles - Triples Pruebas de prctica 3 - NJ 2023 - CristCDL.com The rear trailer of a double 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. your vehicle is so long that you must swing wide to make a turn. A full trailer behind a truck D Which is most likely to tip over: Also available in App Store & Google Play. What should you check for when inspecting the converter dolly and the pintle hook? B. the emergency line valve open and release air 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. Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. Your tractor protection valve control should pop out, or go from normal to emergency position, when air pressure falls into what range? Allow more following distance. Take special care when pulling two and three trailers. A If the spring brakes do not release when you push the trailer air supply control, check the air line connections. You should not hear air escaping. C. may have poor traction due to bouncing and wheel lockup, Before you can supply air to the air tanks of a second trailer you need to: 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 _______. Trailer Air Tanks And Shutoff Valves - TruckingTruth on kingpin. That split second that you release the brakes will allow them to match the vehicles road D Ship to Store. You need to brake in order to regain control. The rear trailers shut off valves should be closed and the front open to allow air to the Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. Time used (Requires timer add on). cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. What should you check for when inspecting a converter dolly? Only trailers designed to be pulled with another trailer behind it will have a shut off valve. For emergency braking you should: You are doing a walk around inspection of a double or triple trailer rig. Contributor: Luke Nold (Experienced truck driver for 5+ years and published writer for Fleet Magazine). 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