you are doing a walkaround inspection of a double or triple trailer rig. Good speed management says you should: You must drive through deep or flowing water. 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? You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. What should you check for when inspecting a converter dolly? 0000010783 00000 n Use the engine brake or speed retarder. Which of these statements about the handling of doubles and triples is true? Follow the procedures described later in this section. What is a converter dolly? When coupling, be sure to couple the proper glad hands together. A. use light, steady pressure on the brake pedal The lightest trailer Types of converter dollies. C. use stab or controlled braking, Which of these is true? you are visually checking the coupling of a converter dolly to the rear trailer. When driving a truck with more than one trailer, which trailer should be first behind the truck? You are doing a walkaround inspection of a double or triple trailer rig. What's a converter dolly? 27. Then, the air loss from the leak will lower the air tank pressure quickly. A 360 degree area of awareness is weather passes. 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. Doubles and triples must be driven very smoothly to avoid rollover or jackknife. A. completely open A. open While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. We'll help you make the right choices and prepare for a great start to your trucking career. 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. 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. How many different ways of coupling and uncoupling trailer combinations are there? Compressed air usually has some water and some compressor oil in it. A) one inch of space . _______ should be tested with the hand valve but controlled in normal operation with the foot pedal. At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. C. posted speed limits on curves are safe for all trucks, Empty trucks: Becoming A Truck Driver is a dream we've all pondered at some point in our lives. How do you check to make sure trailer height is correct before coupling? The pintle hook? cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? how can you be sure you supplied air to a second trailer? A) closed . open, closed, closed: Term. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. What value of channel width must the design use? You are doing a walk around inspection of a double or triple trailer rig. 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; . When entering a roundabout, a driver must yield the right-of-way to drivers already in the roundabout and obey all traffic signs. front of the second trailer. The application only takes one minute. Doubles and triples take up more space than other commercial vehicles. Hit the article to see the way to back up your trailer like a pro! A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. 0000009556 00000 n B To help, some companies offer their drivers per diem to get them started Read More, Driving a semi-truck for a living is unlike any other profession. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. Please wait while the activity loads. Air escape from the open valve 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 the turn. Always test the trailer brakes before driving with the hand valve or by pulling the air supply (tractor protection valve) control. Once you have coupled your rear trailer, you should test the coupling by? What is a converter dolly? The heaviest trailer All other trailer air functions use the emergency line. If you feel We are an independent company focused on providing valuable motor vehicle and permit practice test information. When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. The emergency line valve open and release air To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space fifth wheel, so trailer is raised slightly when dolly is pushed under it. The Verge logo. This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. 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? You should not hear air escaping. Leave the emergency line shut-off valve closed and open the service line valve. Go to the rear of the rig. Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. When testing trailer service brakes, you should use? Locking jaws open 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. 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 Blue is used for the service lines, and red for the emergency (supply) lines. will have a lamp on the drivers side. Doubles and triples are more likely to turn over than other combination vehicles because of what effect? What types of trailers can get stuck on raised crossings? There is no requirement or exact standard for color coding. Open the shut-off valves at the rear of the last trailer and listen for air flow. Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. What does the drivers manual say about how much space you should keep ahead of your truck? axle will have spring brakes due to the weight of the unit. Time used (Requires timer add on). 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. utilize the brakes. on kingpin. A. the total stopping distance of a truck is the distance it takes to stop once the brakes are put on at any speed Open the emergency line shut-off valve at the rear of the last trailer. 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. 5. 1. A turn of the glad hand attached to the hose will join and lock the couplers. When the road is slippery 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. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. Air escape from the open valve 0000007508 00000 n Doubles and triples are more likely to overturn than other combination vehicles because of the whip cracking effect. For emergency braking you should: which of these statements about emergency steering is true? Open the emergency line shut-off valve at the rear of the last trailer. D Pull gently against the pin of the second trailer. Trailer Air Tanks And Shutoff Valves - Page 50. Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? which of these is not a good thing to do when driving on slippery roads? 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. Calculate the Mach number at section 2. 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. You can test that air is flowing to all trailers by opening? When you do this, you should hear: Once you are finished, click the button below. D When uncoupling, you should never unlock the _______ with the dolly still under the rear trailer. If not, there is a problem. A New! Email Updates When New Articles Are Posted. 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! Because of this, which of the following vehicle parts is most likely to tip over? Use only the trailer brakes Pickup at South Loop. On a triple combination, the shutoff valves on the rear of the last trailer should be? "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. 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. 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. which of these statements about the handling of doubles and triples is true ? Those that do not have spring brakes have emergency brakes that work from the air stored in the trailer air tank. Safety chains secured to trailer (s). air throughout the system. The heavier trailer should be in the rear. Mar 2 - Mar 3. 11 During normal operation the brakes of the double/triple trailer are controlled by: Which of the following must be connected when coupling tractor to trailer or trailer to trailer? B. closed Each trailer and converter dolly has one or more air tanks. B Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? B. allow one vehicle length for every 10,000 lbs of gross vehicle weight How To Use Cruise Control Effectively As A Truck Driver. Also, this page requires javascript. Open, latched 0000003240 00000 n When doing a walkaround inspection of a double or triple trailer, the shut-off valves should be _______ at the rear(s) of the front trailer(s) and ________ at the rear of the last trailer. You should avoid traveling next to others when possible. The dolly tow bar may fly up and ensuring it is secure. Converter dollies: Simply click in your answer to each CDL practice test question. You should reduce your speed by about _____ on a wet road. Ship to Store. 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: Go to Section 4: Other Topics This question is in Section 4: Other Topics of our CDL Test Guide. 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. Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). When driving doubles or triples how should they be driven to avoid rollover or jackknifing: The road is dry and the visibility is good. recouple. The trailer is at the correct height when. 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. You have not finished your quiz. Locking jaws closed on A. countersteer The crack the whip effect that troubles trucks with trailers. Time limit varies by state. You are driving with more than one trailer. Join 50,000+ users around America to get your Commercial Driver License today! With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. 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 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]. True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. When does the "driver's manual" advise disconnecting the steering axle brakes to help The Doubles and Triples written CDL Exam is required for your doubles and triples endorsement. C. always keep your vehicle to the left side of your lane, When testing the coupling of double trailers, the landing gear of the rear trailer should be: 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. Visually check to make sure that the lead trailer is slightly higher than the center of NPT thumbscrew style design enables easy installation. Allow much more space than is needed for ideal driving condition. Be certain you are clear at the sides before changing lanes. What will happen if there is a major leak in the service air line? You MUST have air all the way to the back for all the brakes to work. D Slow to the safe speed before entering, then accelerate slightly through the curve. The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. The pressure in the service line tells how much pressure the relay valves should send to the trailer brakes. The rear trailers shut-off valves should be closed and the front open. you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. Why is there still destructive interference? 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? There are more critical parts to check when you have two or three trailers. D Time allowed (Requires timer add on). If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. When checking the coupling system, make sure that the locking jaws are around the shank of the. You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). A sudden movement with the steering wheel can result in a tipping over rear trailer. the converter dolly air tank drain valve on couple double/triple trailers should be: to check if the converter dolly is securely coupled to the rear trailer you should: pull gently against the pin of the second trailer. 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 should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. 0000010705 00000 n To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space B. keep gentle pressure on the brakes while going through the water and for a short distance after coming out A dolly should be pulled out from a rear trailer using? You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. When connecting a converter dolly to a rear trailer, the trailer height must be adjusted so that it is? How can you test that air flows to all trailers? None of the above, 2. 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. 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? 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 _______. ), a 15 year truck driving veteran, in January 2007. Light cords firmly in sockets on trailer. D 10. A low air buzzer will go off indicating something is wrong and either the front or the 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 Air pressure is sent from the air tanks to the brakes by relay valves. what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? A Park on level ground, put chock on the tires, and charge the air tank. When checking the fifth wheel, you should make sure that it has enough? 0000003977 00000 n CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Drivers License Doubles and Triples Endorsements Knowledge Test. This has the same value as the %%TOTAL%% Variable on the Final Screen. C Which of these is most likely too occur? All rights reserved Site Map. When driving a double or triple trailer, greater care must be given to. Chock the tires, park on level ground and charge the trailer air tank if it does Wait for air pressure to reach normal, then push in the red trailer air supply knob. 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. 8. Nothing, the weight of the trailer will keep it in place, 10. The dolly tow bar may fly up, possibly causing injury, and making it very difficult to None of the above, 5. Doubles and triples are more likely to turn over than other combination vehicles because of the "crack-the-whip" effect. This has the same value as the %%SCORE%% Variable on the Final Screen. To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: Closed. When you turn with the tractor/triple trailer combination the wheels that off-track (cheat) the most are: You should check trailer height before connecting a converter dolly to a second or third trailer. . It is important to check the height of the trailer before connecting a converter dolly to a trailer. C Open the emergency line shut-off valve at the rear of the last trailer. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. Provides a snug fit to eliminate unwanted seepage of air or water. Submit your email at the end of the test. 9 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. The rear trailer does not have shut-off valves. A. open the shut-off valves at the rear of both trailers 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. Stay up to date on truck driving industry news. 7. In the coupling system, the locking jaws should be fixed around?
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