the converter dolly air tank drain valve should be

That there is some space between the upper and lower fifth wheel. You are driving a 100 ft twin trailer combination at 50 mph. [Penalties Applying to Any DUI Conviction; Driving Under the Influence of Drugs or Alcohol (The "DUI" Law); Section B-7 Alcohol, Other Drugs and Driving; Tennessee Comprehensive Driver License Manual]. When uncoupling a rear trailer, your rig should be parked in a straight line on? There is no requirement or exact standard for color coding. You wish to turn right from one two-lane, two-way street to another. Simply click in your answer to each CDL practice test question. The pintle hook? should remain in the closed position. Push the brake pedal as hard as you can and hold it there 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 These mirrors: make things seem smaller & further away then they really are. None of the above, 4. The crack the whip effect will topple the rear trailer first. Submit your email at the end of the test. All rights reserved Site Map. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. 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. The road is dry and visibility is good. locked . The rear trailers shut-off valves should be closed and the front open. How To Use Cruise Control Effectively As A Truck Driver. Becoming A Truck Driver is a dream we've all pondered at some point in our lives. converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can . kingpin, That there is grease between upper and lower fifth wheel. doubles/triples flip flop over from quick steering movements more easily than many other vehicles. Because of this, which of the following vehicle parts is most likely to tip over? Their drawbars differentiate them. A converter gear or dolly is a coupling device of one or two axles and a fifth wheel by which a semi-trailer can be coupled to the rear of a tractor-trailer combination forming a double bottom. 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: A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. Shut-off valves (also called "cut-out cocks") are used in the service and supply air lines at the back of trailers used to tow other trailers. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. rear brakes will not work properly. C The emergency line valve open and release air The converter dolly is an auxiliary axle with a coupling device. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? Any items you have not completed will be marked incorrect. Use the engine brake or speed retarder. All material on this website is copyrighted. Air Storage and Drain Tanks: Air storage tanks are used to hold compressed air. Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. A 360 degree area of awareness is When you do this, you should hear: 1) the first one is to pump down the air pressure in the system between 20 and 45psi (pounds per square inch) the trailer air supply will pop out, shutting air off to the trailer. Allow much more space than is needed for ideal driving condition. B B. pull gently against the pin of the second semitrailer When uncoupling doubles or triples, what is important to know about unlocking the pintle hook? 0000005345 00000 n Do converter dollies have spring brakes? Go to the rear of second trailer and open the emergency line shut-of valve. You shouldn't stop braking. The total number of questions. Locking jaws closed on 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? Which the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. You are doing a walk around inspection of a double or triple trailer You are driving a 100 foot twin trailer combination at 50 mph. A full trailer behind a truck then there is a problem with the ABS system. The last trailer in a combination is most likely to turn over. This has the same value as the %%WRONG_ANSWERS%% Variable on the Final Screen. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space Hook dolly to front trailer. B. open; latched Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. 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. What is a converter dolly? When checking the coupling system, make sure that the locking jaws are around the shank of the. Florida CDL Handbook | FL CDL Handbook Coupling & Uncoupling for Speed for other vehicles is often too fast for a multi-combination unit! Each trailer and converter dolly has one or more air tanks. How do you know if your converter dolly is equipped with antilock brakes? Any vehicle required by federal regulations to be placarded while transporting hazardous materials. Flashcards - Doubles Triples Test #3 - FreezingBlue 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. TestPermit.com is not affiliated, endorsed, or sponsored by state agencies or any motor vehicle and any other departments in the United States, Canada, UK. 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. Time allowed (Requires timer add on). That split second that you release the brakes will allow them to match the vehicles road You are driving a 100-feet truck with double trailers at 50 mph. 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. You should keep at least _____ seconds of space ahead of you. you are driving a set of doubles and a set of trailer wheels goes in a skid. Open the emergency line shut-off valve at the rear of the last trailer. This will prevent water and dirt from getting into the coupler and the air lines. The tanks will hold enough air to allow the brakes to be used several times even if the compressor stops working. 0000001162 00000 n 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. All of the above, 6. When does the "driver's manual" advise disconnecting the steering axle brakes to help This has the same value as the %%TIME_USED%% Variable on the Final Screen. Follow the procedures described later in this section. We'll help you make the right choices and prepare for a great start to your trucking career. 0000007032 00000 n Converter dollies have spring brakes. This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. 3. 27. can and will get stuck on a raised railroad crossing. Number of wrong answers. Pickup at South Loop. 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. A. release the spring brakes and check for movement Open 1/4 in. A. hand valve B Also, this page requires javascript. B. keep other traffic out of your side space 11 When does the Driver's manual say you should disable the steering axle brake? B. restore traction to the tires A. open Never unlock the pintle hook with the dolly still under the rear trailer. D True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. 0000008915 00000 n The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. 2. You should check the height of the trailer before connecting a converter dolly to a second or third trailer. Be sure air-lines are supported and glad hands are properly connected. 0000003240 00000 n the rig will continue moving in a straight line no matter how much the steering wheel is turned. when driving a truck with more than one trailer, which trailer should be first behind the truck? Why should you use chocks when parking a trailer 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? 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. - Converter dolly air tank drain valve: CLOSED. Hb```f``b`c``e@ (Q6_* While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. B. releasing the pintle hook weather passes. Visually check to make sure that the lead trailer is slightly higher than the center of B We are an independent company focused on providing valuable motor vehicle and permit practice test information. 0000001956 00000 n Pull gently against the pin of the second trailer. _______ should be tested with the hand valve but controlled in normal operation with the foot pedal. 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. Each trailer and converter dolly has one or more air tanks. Before you can supply air to the air tanks of a second trailer you need to: Open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of second trailer. Should the converter dolly air-tank drain valve be open or closed on a double trailer combination? Make sure you do not get in a spot you cannot pull straight through. What should you check for when inspecting a converter dolly - Answers 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. Chock the tires, park on level ground and charge the trailer air tank if it does Before you can supply air to the air tanks of a second trailer you need to. You are doing a walk around inspection of a double or triple trailer rig. When uncoupling the converter dolly Why should you never unhook the Should the shut-off valves on the trailers be open or closed on a set of double trailers? Usually need a glad hand converter you want to hook your combination to a second trailer that has no spring brakes. A dolly is like a very short trailer, with a ring hitch on the front and a fifth wheel on top. Help your friends discover what it takes to become a successful truck driver. B. for doubles and triples, the fifth wheel should be all the way towards the tractor We are here to help. Eventually, the air will leak away, and then there will be no brakes. Never pull any trailer without visually inspecting the fifth wheel locking bar A How do you check to make sure trailer height is correct before coupling? The dolly tow bar may fly away, possibly causing panic, and making it very difficult Safety should never take second place, so know your stuff! How should you test the coupling? Be more careful in adverse conditions. 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 Open the emergency line shut-off valve at the rear of the last trailer. C Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). 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. fumoto drain valve. B. slightly open Doubles and triples are more likely to turn over than other combination vehicles because of the "crack-the-whip" effect. 9 Before coupling a trailer, you should make sure it is at the right height using? 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. A Take special care when pulling two and three trailers. A. open the shut-off valves at the rear of both trailers 0000002446 00000 n It's a fifth wheel, not a sixth wheel. the fifth wheel, so trailer is raised slightly when dolly is pushed under it. Related Question Question: What does this sign mean? What three methods can you use to secure a second trailer before coupling? Our normal business hours are Monday-Friday 8 a.m. to 5 p.m. (Pacific Time). When you do this, you should hear: Ais escape from the open valve. They provide the air pressure used to operate trailer brakes. DMV Doubles Triples Practice Test | CDL Knowledge front of the second trailer. What types of trailers can get stuck on raised crossings? The road is dry and the visibility is good. 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. Doubles and triples take up more space than other commercial vehicles. B. are the easiest to stop since there is no shifting cargo 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. When the road is dry These trailers have no parking brake. 0000001107 00000 n 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. King pin. Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. 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? Visually check to make sure that the rear trailer is slightly lower than the center of the Leave the emergency line shut-off valve closed and open the service line valve. Seriously! 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. c. iron If spare tire is on converter gear (dolly), make sure it is secured. With the red knob pushed in on the tractor dash, the service line should have air in it. There are more critical parts to check when you have two or three trailers. Therefor, if there is a major leak in your service line, you may not know it until you try to use the service brake. The application only takes one minute. Why should you not use the trailer hand valve while driving? when does the drivers manual say you should disable the steering axle brakes? What is the most common foundation brake found on heavy vehicles? 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. A sudden movement with the steering wheel can result in a tipping over rear trailer. What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? Any time you have to

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