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. 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. C. fully raised, Which of these statements about speed management and braking is true? A dolly should be pulled out from a rear trailer using? King pin. 0000006015 00000 n Some areas of concern are discussed below. 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. locked . If the dolly is a two axle unit then 1 60607. However, converter dollies and trailers built before 1975 are not required to have spring brakes. Park on level ground, put chock on the tires, and charge the air tank. How can you be sure you supplied air to a second trailer? True! In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. some large trucks have curved (convex or spot) mirrors. 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. Why should you use chocks when parking a trailer without spring brakes? you want to hook your combination to a second trailer that has no spring brakes. If your tanks have automatic drains, they will keep most moisture out, but you should still open the drains to make sure. You should NOT: You are driving a set of doubles and a set of trailer wheels goes into a skid. Which trailer should come first behind the tractor? . Make sure trailer height is correct. To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. B. Pickup at South Loop. Doubles and triples are more likely to overturn than other combination vehicles because of the whip cracking effect. Ensuring the safety of the public starts with a thorough You are driving a 100 foot twin trailer combination at 50 mph. Like a trailer, a dolly equipped with ABS will have a yellow indicator light on the left side. 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. B. slightly raised 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]. . All material on this website is copyrighted. cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. Becoming A Truck Driver is a dream we've all pondered at some point in our lives. 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. Please visit using a browser with javascript enabled. Which of these is most likely to occur? The rear trailer of a triple Pull gently against the pin of the second trailer. This will let the rear wheels roll again and keep the rear wheels from sliding. The air lines will rupture What three methods can you use to secure a second trailer before coupling? 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. What do you check when making a visual check of coupling? You must steer gently when pulling trailers. At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. Question 3 Explanation: All of the above. Use controlled or stab braking Never, 9. retrovirus $_____________________________$. The road is dry, and visibility is good. Push the brake pedal as hard as you can and hold it there You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. When inspecting the air brakes on doubles and triples, you wait for air pressure to reach normal, then push in the red trailer air supply knob. 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: Hit the article to see the way to back up your trailer like a pro! Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. The dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. What is the most common foundation brake found on heavy vehicles? Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples. - Converter dolly air tank drain valve: CLOSED. If the converter dolly is close to your semitrailer, you should wheel it into position? A connection device of one axle used to disconnect a semitrailer combination vehicle You should reduce your speed by about _____ on a wet road. The dolly tow bar may fly away, possibly causing panic, and making it very difficult Hit the article below to see specific information about AOBRDs! How many different ways of coupling and uncoupling trailer combinations are there? 2 The dolly tow bar may fly up, possibly causing injury, and making it very difficult to Open These mirrors: Make things seem smaller and further away than they really are. 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? There is a school zone ahead. A bent or damaged kingpin on a coupling should be? You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. 1/2 to 3/4 of an inch A dolly has lights, air tanks, air relays, air lines, air brakes, ABS, electrical connections, etc. What three methods can you use to secure a second trailer before coupling? 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. Which is most likely to tip over: A 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. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. When driving with more than one trailer, which trailer should be the first one behind the tractor? You are doing a walk around inspection of a double or triple trailer rig. Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). 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. Which of these is most likely too occur? Mar 2 - Mar 3. 0000004689 00000 n 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 B Light cords firmly in sockets on trailer. 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. The pintle hook should always be secure when the vehicle is in motion. you are doing a walkaround inspection of a double or triple trailer rig. Go to the rear of the rig. For all brakes to work on a triple combination, you must have air supply? This is CDL Doubles and Triples Test 3in our original Classic Mode. 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. You will speak with recruiters today. You must steer gently when pulling trailers. Slow to the safe speed before entering, then accelerate slightly through the curve. You should be sure the converter dolly air tank . and possible answers include: open, free or closed, latched or closed, free or open, latched from TruckersDouble & Triple Trailer (CDL) Endorsement. These dollies will have a yellow lamp on the left side of the dolly. You are driving a tractor with multiple trailers. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. When coupling, be sure to couple the proper glad hands together. The emergency brakes come on whenever the air supply knob is pulled out or the trailer is disconnected. A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. C Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. Submit your email at the end of the test. That split second that you release the brakes will allow them to match the vehicles road A Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). What does the drivers manual say about how much space you should keep ahead of your truck? The road is dry and visibility is good. The number of correct answers. While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. B. slow to a safe speed before entering the curve, then accelerate slightly through it Compressed air usually has some water and some compressor oil in it. The lightest trailer If one air system is very low on pressure _______. Which of these are the correct positions for shut-off valves in doubles and triples? A. closed; latched Time limit varies by state. You should keep at least ____ seconds of space ahead of you. 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). 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested It is important to check the height of the trailer before connecting a converter dolly to a trailer. C 0000001354 00000 n symptoms of a bad fuel tank selector switch. When you're trying to correct a drive-wheel braking skid why should you stop braking? When you do this, you should hear: you are driving with double trailer and must use your brakes to avoid a crash. 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. D The tanks will hold enough air to allow the brakes to be used several times even if the compressor stops working. 9 Our normal business hours are Monday-Friday 8 a.m. to 5 p.m. (Pacific Time). B. keep other traffic out of your side space 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. Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? These trailers have no parking brake. with the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. 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. The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. kingpin, That there is grease between upper and lower fifth wheel. When driving a truck with more than one trailer, which trailer should be first behind the truck? True or False? Which of these statements about the handling of doubles and triples is true? It is very important to keep the air supply clean. Provides a snug fit to eliminate unwanted seepage of air or water. Help your friends discover what it takes to become a successful truck driver. 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. S-cam brakes are the most common style brakes on large trucks today. Park the rear trailer against another trailer, chock the tires and lock the trailer Closed, latched Make sure you have large enough gaps before entering or crossing traffic. kingpin. B paramount to safe driving. A. make things look smaller and farther away than they really are securely fastened. 1. Doubles and triples are more likely to turn over than other combination vehicles because of the "crack-the-whip" effect. Join 50,000+ users around America to get your Commercial Driver License today! A. release the spring brakes and check for movement Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. 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. Open, latched unsafe slow down even further, or better yet, find a safe haven and park until the C How do you check to make sure trailer height is correct before coupling? Make sure you do not get in a spot you cannot pull straight through. You are visually checking the coupling of a converter dolly to the rear trailer. If spare tire is carried on converter gear (dolly), make sure it's secured. 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. How do you know if your converter dolly is equipped with antilock brakes? 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? Any items you have not completed will be marked incorrect. 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: