the converter dolly air tank drain valve should be

You can also reach us at (888) 830-2326. B. closed You are doing a walk around inspection of a double or triple trailer rig. Compressed air usually has some water and some compressor oil in it. When you do this, you should hear: Ais escape from the open valve. On a triple combination, the shutoff valves on the rear of the last trailer should be? 0000001956 00000 n The last trailer in a combination is most likely to turn over. True or False? 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 Please wait while the activity loads. These trailers have no parking brake. The crack the whip effect that troubles trucks with trailers. Some vehicles have dead end or dummy couplers to which the hoses may be attached when they are not in use. Never, 9. Please visit using a browser with javascript enabled. The word part ferrit- means: Becoming A Truck Driver is a dream we've all pondered at some point in our lives. 0000006015 00000 n 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. %PDF-1.2 % Please use the form below to contact our customer service or sales team. 0000010705 00000 n You are driving a 100-feet truck with double trailers at 50 mph. A. require shorter stopping distances than full ones Secure converter gear support in raised position. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? This will supply air to the emergency (supply) lines. The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. 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. When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? safe speed would be 40 MPH. 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 Verge logo. B. you can almost always stop more quickly than you can turn The crack the whip effect will topple the rear trailer first. A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. 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 should keep atleast __seconds of space ahead of you. 0000007487 00000 n All trademarks are property of their respective owners. Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). The road is dry and visibility is good. How do you know if your converter dolly is equipped with antilock brakes? Which of the following statements about off tracking is true? In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. B 0000001775 00000 n D What is a converter dolly? will have a lamp on the drivers side. Pull gently against the pin of the second 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. 5. Converter dollies have spring brakes. You are visually checking the coupling of a converter dolly to the rear trailer. Either the front or the rear brakes will not work properly or fully. What is likely to happen? C. engaging the tractor valve protection control, You must drive through deep or flowing water. If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). To prevent trailers from rolling over, you must steer gently and go slowly around corners, on ramps, off ramps and curves. what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. When the road is slippery You will have greater length and more dead axles to pull with your drive axles than other drivers. A mTouch Quiz will automatically populate the fields below. If loading fails, click here to try again. The air lines will rupture Simply click in your answer to each CDL practice test question. 0000001107 00000 n retrovirus $_____________________________$. 0000001162 00000 n Once you are finished, click the button below. 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. Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? you are driving at night and you must dim your headlights for traffic. The trailer brakes will unlock For emergency braking you should: A Push the brake pedal as hard as you can and hold it there B Watch the wording of the question AND the answers A safe driver will look for all of the above. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. The number of correct answers. 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. What is a converter dolly? (done) Chp 23: Cash Flow + Working Capital, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Slow to the safe speed before entering, then accelerate slightly through the curve. Leave the emergency line shut-off valve closed and open the service line valve. They provide the air pressure used to operate trailer brakes. 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. It's a fifth wheel, not a sixth wheel. Doubles and triples are more likely to overturn than other combination vehicles because of the whip cracking effect. Make sure to visually inspect the fifth wheel and that the locking mechanism is What's a converter dolly? 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 In double and triple trailers, the trailer air supply control should pop or _________ when air pressure drops into the range of 20 to 45 psi. If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. The couplers have a rubber seal that prevents air from escaping. The road is dry and visibility is good. Flammable materials in the front trailer then it must have the placards on that trailer. Open the emergency line shut-off valve at the rear of the last trailer. To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and B. use only the trailer brakes 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). The topics with which you will want to be expertly familiar are: There isnt as much information to be studied in the classroom or in the CDL manual regarding doubles and triples, so in-lot and on-the-road practice will help you pass this test. Allow more following distance. the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. You should keep at least ___ seconds of space ahead of you. The converter dolly air tank drain valve on coupled double/triple trailers should be: Closed. Closed, latched securely fastened. More driving knowledge, questions and answers, online practice tests for obtaining a drivers . A green traffic light allows the driver to go. Hit the article below to see specific information about AOBRDs! Study section 6.2 if you can't answer all of these questions. coupled to the rear of a tractor-trailer combination forming a double bottom rig, Careful of the wording! Often do not have spring brakes You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. Safety should never take second place, so know your stuff! You are visually checking the coupling of a converter dolly to the rear trailer. How do you check to make sure trailer height is correct before coupling? What should you check for when inspecting the converter dolly and the pintle hook? B. slow to a safe speed before entering the curve, then accelerate slightly through it C. closed; unlatched, Which of these will result in the best control on a curve? If the dolly is a two axle unit then 1 In the coupling system, the locking jaws should be fixed around? ADVERTISEMENT ADVERTISEMENT Hit the article to see the way to back up your trailer like a pro! This means. There is a school zone ahead. Terms in this set (43) Converter dollies are used to connect: A tractor-trailer combination to another trailer. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. A. release the spring brakes and check for movement Page 7-6 Commercial Driver's Manual/2.0 = Be sure air lines are supported and glad hands are properly connected. 1 How many different ways of coupling and uncoupling trailer combinations are there? D Make sure trailer height is correct. The road is dry and the visibility is good. 0000010306 00000 n 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? This has the same value as the %%WRONG_ANSWERS%% Variable on the Final Screen. Do converter dollies have spring brakes? A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. 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? "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. You must treat a flashing red signal as you would treat a STOP sign. you want to hook your combination to a second trailer that has no spring brakes. The heaviest trailer If you crossed the air lines, you could drive away, but you would not have trailer brakes. The number and size of air tanks varies among vehicles. When you do this, you should hear: Which of these statements about emergency steering is true? Nothing, the weight of the trailer will keep it in place, 10. B 0000003060 00000 n A. allow "much more space" than is needed for ideal driving conditions A utilize the brakes. C The pintle hook? A. hand valve 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. A When coupling twin trailers, a converter dolly is. You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. None of the above, 2. The road is dry and visibility is good. 8. the rig will continue moving in a straight line no matter how much the steering wheel is turned. TestPermit.com provides free unofficial review materials for a variety of exams. At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? when driving a truck with more than one trailer, which trailer should be first behind the truck? you can fuck a pornstar craigslist cars and trucks for sale by owner; kd linear actuator kdpt007 what is ait in the army; native american spiritual cleansing prayer simple spectrum coupon code; . Any trailer, 7. how can you be sure you supplied air to a second trailer? You want to lock your combination to a second trailer that has no spring brakes. 3. Eventually, the air will leak away, and then there will be no brakes. Should the shut-off valves on the rear of the last trailer be open or closed? It is very important to keep the air supply clean. If the spring brakes do not release when you push the trailer air supply control, check the air line connections. Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? For emergency braking you should: May have poor traction due to bouncing and wheels lockup. 0000001354 00000 n You should keep at least ____ seconds of space ahead of you. 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? 0000006836 00000 n Any vehicle required by federal regulations to be placarded while transporting hazardous materials. That split second that you release the brakes will allow them to match the vehicles road Which of these is most likely too occur? However, converter dollies and trailers built before 1975 are not required to have spring brakes. Also, this page requires javascript. Definition. When you go to the rear of the last trailer, what should you do to complete this check? Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? They are filled by the emergency (supply) line from the tractor. symptoms of a bad fuel tank selector switch. Air flows steadily and isentropically through a passage. 2003-2023 Chegg Inc. All rights reserved. Follow the procedures described later in this section. Never pull any trailer without visually inspecting the fifth wheel locking bar The last trailer in a combination is most likely to turn over. Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. The heavier trailer should be in the rear. For emergency braking you should: You are doing a walk around inspection of a double or triple trailer rig. Do converter dollies have spring brakes? Use only the trailer brakes Blue is used for the service lines, and red for the emergency (supply) lines. Explore now! All other trailer air functions use the emergency line. Doubles and triples take up more space than other commercial vehicles. 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? Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. C. posted speed limits on curves are safe for all trucks, Empty trucks: Tips for Backing Up a Trailer Like a Pro Trucker. 0000001582 00000 n If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? A. always keep your vehicle to the right side of your lane If spare tire is on converter gear (dolly), make sure it is secured. How do you know if your converter dolly is equipped with antilock brakes? You are driving with double trailers and must use your brakes to avoid a crash. How should you test the coupling? Park on level ground, put chock on the tires, and charge the air tank. Hb```f``b`c``e@ (Q6_* All ABS equipped units Never unlock the pintle hook with the dolly still under the rear trailer. Converter dollies are connected to front trailers with a? B. the emergency line valve open and release air You should hear air escaping, showing the entire system is charged. 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. Make sure the converter dolly air tank drain valve is closed. Which is most likely to tip over: B. for doubles and triples, the fifth wheel should be all the way towards the tractor Sometimes, metal tags are attached to the lines with the words service and emergency stamped on them. If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen? When testing trailer service brakes, you should use? A. This would be very dangerous. 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. You should check the height of the trailer before connecting a converter dolly to a second or third trailer. How do you check to make sure trailer height is correct before coupling? For emergency braking you should: When checking the coupling system, make sure that the locking jaws are around the shank of the. Some areas of concern are discussed below. C 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! Any trailer with a reduced ground clearance A. closed; latched locked . B. you should avoid traveling next to others whenever possible What types of trailers can get stuck on raised crossings? kingpin, That there is grease between upper and lower fifth wheel. When connecting the glad hands, press the two seals together with the couplers at a 90-degree angle to each other. Take special care when pulling two and three 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 _____. 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. Doubles and triples must be driven very smoothly to avoid rollover or jacknife. 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. Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. The dolly tow bar may fly up, possibly causing injury, and making it very difficult to 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. Always unlock the pintle hook with the dolly still under the rear trailer. On a triple combination, the shutoff valves at the rear off the middle trailer should be? Which of the following will occur? 0000006383 00000 n The dolly tow bar may flip up causing bodily injury and making it very difficult to B. pull gently against the pin of the second semitrailer 2. It depends on the load 0000005733 00000 n This is CDL Doubles and Triples Test 3in our original Classic Mode. 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. If you do, the brakes may not work correctly. Converter dollies: In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. 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. 0000003261 00000 n The rear trailers shut-off valves should be closed and the front open. first check for battery voltage to the valve by probing the wires of the electrical connector with a volt-meter it should be about 10.5 volts if not it's probably bad.next remove the valve. Also available in App Store & Google Play. Open the shut-off valves at the rear of the last trailer and listen for air flow. then there is a problem with the ABS system. When connecting a converter dolly to a rear trailer, the trailer height must be adjusted so that it is? We'll help you make the right choices and prepare for a great start to your trucking career. 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 For all brakes to work on a triple combination, you must have air supply? Release Dolly breaks by opening the air tank petcock or if the dolly has a spring break, use the Dolly parking brake control . Time limit varies by state. and ensuring it is secure. Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver. you are doing a walkaround inspection of a double or triple trailer rig. They are filled by the emergency (supply) line from the tractor. You wish to turn right from one two-lane, two-way street to another. It is important not to let water and oil build up in the air tanks. You should keep at least ____ seconds of space ahead of you. 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. slow to safe speed before entering, then accelerate slightly through the curve. B The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. Open What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly? B. are the easiest to stop since there is no shifting cargo In order to receive your Doubles and Triples endorsement, it is required that you pass the states official CDL written Knowledge exam. Stop the vehicle by gearing down and sparingly These mirrors: make things seem smaller & further away then they really are. Usually need a glad hand converter the fifth wheel, so trailer is raised slightly when dolly is pushed under it. All rights reserved Site Map. 1/32 to 3/32 of an inch. If you do, there is a problem. Go to Section 4: Other Topics This question is in Section 4: Other Topics of our CDL Test Guide. b. cell Opening the shut off valves on the rear most trailer will ensure the lines are flowing 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. That there is no space between upper and lower sixth wheel. The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. 0000007032 00000 n Pintle-eye of dolly in place in pintle hook of trailer (s). Which is most likely to tip over: When entering a roundabout, a driver must yield the right-of-way to drivers already in the roundabout and obey all traffic signs. 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.

the converter dolly air tank drain valve should be 2023