CDL Practice Test Quiz Latest Updated with Complete Solutions. Graded A

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CDL Practice Test Quiz Latest Updated with Complete Solutions A railroad crossing is ahead of you and you are hauling hazardous material. When you stop for the crossing, you can stop as far away as... ____ feet from the nearest rail. Correct Answer-50 Who is responsible for safely transporting a hazardous material shipment without delay and keeping the shipping papers in the right place? Correct Answer-the driver You find an overheated tire during an enroute inspection. If you are hauling hazardous materials, you must: Correct Answer-Remove the tire and place it a safe distance from the vehicle. The intent of hazardous materials regulations is to ensure safety, to contain the material, and: Correct Answer-to communicate the risk The total transport index of all radioactive material packages in a single vehicle must not exceed ____. Correct Answer-50 You are going to be hauling hazardous materials over a route you do not know well. When should you check the route and get the permits needed for the trip: Correct Answer-before starting the trip Which three hazard classes should not be loaded into a trailer that has a heater / air conditioner unit. Correct Answer-flammable liquids flammable gas explosives What is the only exception to certification by a shipper? Correct Answer-Correct When the shipper is a private carrier of his own product. A truck carrying explosives has crashed with another vehicle. You should not pull them apart until. Correct Answer-correct The explosives have been placed at least 200 feet away from the vehicles and occupied buildings.When handling packages of explosives, you must: Correct Answer-Correct Never use hooks or other metal tools When driving with more than one trailer, which trailer should be the first one behind the tractor? Correct Answer-correct Answer: The heaviest trailer You are driving a 100 foot twin trailer combination at 50 mph. The road is dry and the visibility is good. You should keep at least ____ seconds of space ahead of you. Correct Answer-Correct Answer: 11 With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. When you do this, you should hear: Correct Answer-Correct Answer: Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking you should: Correct Answer-Correct Answer: Use controlled or stab braking Converter dollies: Correct Answer-Correct Answer: Often do not have spring brakes The crack the whip effect that troubles trucks with trailers. Which is most likely to tip over: Correct Answer-Correct Answer: The rear trailer of a triple You are doing a walk around inspection of a double or triple trailer rig. You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. Correct Answer-closed, latched When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? Correct Answer-Correct Answer: Never If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen? Correct Answer-Correct Answer: The dolly tow bar may fly up You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking you should: Correct Answer-: Use controlled or stab brakingYou are visually checking the coupling of a converter dolly to the rear trailer. How much space should be between the upper and lower fifth wheel? Correct Answer-none When should you check your mirrors while making a lane change? Correct Answer-...a. After signaling the change b. Right after starting the lane change after completing lane change Which of these statements about managing space to the sides is true? Correct Answer-...Correct Answer: You should avoid traveling next to others when possible Which of these statements about handling of doubles and triples is true? Correct Answer-...Correct Answer: A sudden movement with the steering wheel can result in a tipped over rear trailer How can you be sure you supplied air to a second trailer? Correct Answer-...Correct Answer: Go to the rear of the second trailer and open the emergency line shut off You should check the height of the trailer before connecting a converter dolly to a second or third trailer. The trailer height is right when: Correct Answer-...a. The trailer will be raised slightly when the converter dolly is backed under it. You want to hook your combination to a second trailer that has no spring brakes. To do this without wheel chocks you should: Correct Answer-...Correct Answer: Supply air to the trailer air system with the tractor and then disconnect the emergency line Which of these will result in the best control on curves? Correct Answer-d. Slowing to a safe speed before entering the curve, then accelerate slightly during the curve Before you can supply air to the air tanks of a second trailer you need to: Correct Answer-c. Open the shut off valves at the rear of both trailersYou are coupling a tractor to a semi trailer and have backed up but are not under it. What should you hook up before backing under? Correct Answer-Correct Answer: The emergency and service air lines. You have coupled with a semi trailer. In what position should you put the front trailer supports before driving away? Correct Answer-Correct Answer: Fully raised with the crank handle secured in its bracket. Air lines on a combination vehicle are often colored to keep them from getting mixed up. The emergency line is ____; the service line is ____. Correct Answer-Correct Answer: Red, blue Which of these statements is true? Correct Answer-Correct Answer: "bobtail" tractors can take longer to stop than a combination vehicle loaded to the maximum gross weight. You are coupling a tractor and semi trailer and have connected the air lines. Before backing under the trailer, you should: Correct Answer-Correct Answer: Supply air to the trailer system, then pull out the air supply knob to lock the trailer brakes. The hand valve should be used: Correct Answer-Correct Answer: To test the trailer brakes. The air leakage rate for a combination vehicle (engine off, brakes off) should be no more than ____ psi per minute. Correct Answer-Correct Answer: 3 The fifth wheel locking lever is not locked after the jaws close around the kingpin. This means that: Correct Answer-Correct Answer: The coupling is not right and should be fixed before driving the vehicle. You are driving a combination vehicle when the trailer breaks away, pulling apart both air lines. You would expect the trailer brakes to come on and: Correct Answer-Correct Answer: The tractor protection valve to close. Semi trailers made before 1975 that are equipped with air brakes: Correct Answer-Correct Answer: Often do not have spring brakes. [Show More]

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