Kansas CDL General Knowledgeby Fred2021/10/202021/10/20 1. The Class A CDL is required for A) school bus drivers. B) any single vehicle with a gross weight over 26,000 pounds. C) any combination vehicle with a gross weight over 26,000 pounds and a towing unit over 10,000 pounds gross weight. D) any vehicle transporting hazardous materials. 2. The Class B CDL permits a driver to operate A) a school bus. B) any single vehicle with a gross weight over 26,000 pounds. C) any combination vehicle with a gross weight over 26,000 pounds and a towing unit over 10,000 pounds gross weight. D) any vehicle transporting hazardous materials. 3. The Class C CDL permits a driver to operate A) any combination vehicle under 26,000 pounds gross weight. B) any vehicle transporting hazardous materials. C) any vehicle with a cargo tank. D) any single vehicle under 26,000 pounds gross weight transporting 16 or more persons OR transporting hazardous cargo requiring placards. 4. The best drivers keep their eyes moving back and forth over A) the first hundred yards in front of the vehicle. B) the first two hundred yards in front of the vehicle. C) the first five hundred feet in front of the vehicle. D) the distance that the vehicle will cover in the next 12-15 seconds. 5. The first 12-15 seconds of distance in front of a vehicle equals, roughly, A) one block at city speeds and a quarter of a mile at highway speeds. B) a quarter of a mile at city speeds and about a block at highway speeds. C) five hundred feet. D) two hundred yards. 6. Brake "fade" means that A) the brakes are difficult to see during inspection. B) you are applying more pressure on the pedal with less effect. C) the brakes are rusty. D) you are applying less pressure on the pedal with more effect. 7. Brake "fade" indicates that brakes are about to fail due to A) rainy weather. B) snowy weather. C) excessive heat buildup and/or poor adjustment. D) rust. 8. The number-one cause of injury and death in roadway work zones is A) explosives. B) alcohol. C) heavy equipment. D) speeding traffic. 9. When slowing down for a roadway work zone it is permissible to A) overtake up to four vehicles before the zone begins. B) use your four-way flashers or brake lights to warn drivers behind you. C) direct traffic from your driver's seat to help others. D) send only ONE text message. 10. Emergency warning devices, such as three red reflective triangles A) are optional safety equipment. B) are optional safety equipment on Commercial Class B vehicles ONLY. C) are required safety equipment on all commercial class vehicles. D) are required only in case of fire. 11. A properly rated and charged fire extinguisher A) is required only on vehicles transporting hazardous materials. B) is required only Commercial Class A vehicles. C) is required only on school buses. D) is require safety equipment on all commercial class vehicles. 12. The correct time to check for the fire extiguisher and emergency warning devices (reflective triangles) is A) during an official inspection by a DOT officer. B) only after an accident. C) only after an accident involving fire. D) during the pre-trip inspection. 13. Emergency warning devices, such as reflective triangles, must be set out when you are stopped on the road or the shoulder of any road A) more than ten minutes. B) behind the vehicle 10 feet, 100 feet, and 200 feet, on a one-way or divided highway. C) in front of the vehicle 100 feet, and behind the vehicle 10 feet, and 100 feet on on a two-way road. D) All of the above. 14. You are driving on a straight, level highway at 55 mph when a tire blows out on your vehicle. What should you do first? A) Use stab braking. B) Use light braking. C) Try to avoid braking and allow the vehicle to slow on its own. D) Steer quickly onto the shoulder. 15. Any consumption of alcohol in a commercial vehicle A) can cause a driver to be put out of service for 24 hours. B) is DUI if the Blood Alcohol Concentration is .04%. C) can be detected by the odor of a driver's breath. D) All of the above. 16. You are driving a 40-foot vehicle at 40 mph. Driving conditions are ideal on a dry road surface with good visibility. What is the least amount of space that you should keep in front of your vehicle to be safe? A) One block B) Two truck lengths C) 3 seconds D) 4 seconds 17. Stopping distance increases with the square of the multiple of the speed. So, if the speed increases by three times, then the stopping distance is multiplied by 32. So if you are driving a vehicle that can be stopped from 20 mph in 40 feet, then your stopping distance at three times that speed would be A) 60 mph × 3, or, 180 feet. B) 40 feet × 3, or 120 feet. C) 40 feet × 32, or 360 feet. D) less than a football field. 18. If your vehicle starts hydroplaning in deep water or slush, you should A) release the accelerator and push in the clutch. B) send a text to your dispatcher. C) hit the brakes hard. D) use controlled braking. 19. If you are found to have a BAC (Blood Alcohol Concentration) of .02 while operating a commercial vehicle you will A) be placed out of service for 8 hours. B) be placed out of service for 12 hours. C) be placed out of service for 24 hours. D) be charged with DUI. 20. All drivers must wear seat belts A) any time the vehicle is in motion. B) only in states where they are required. C) especially when the driver is texting while driving. D) only when the vehicle is transporting hazardous materials. 21. A vehicle inspection is required A) only once a week. B) only when transporting hazardous materials. C) only when transporting passengers. D) to pass the CDL exam. 22. Automatic failure of the CDL pre-trip exam would be caused by neglecting A) only once a week. B) only when transporting hazardous materials. C) only when transporting passengers. D) to pass the CDL exam. 23. With the air brakes applied, a brake system should not lose more than ______ pounds per minute on a single vehicle and _____ pounds per minute on a combination vehicle. A) 3, 4 B) 1, 2 C) 5, 7 D) 6, 10 24. The Low Air Warning light and buzzer/beep should deploy at approximately A) 120 p.s.i. B) 100 p.s.i. C) 90 p.s.i. D) 55 p.s.i. 25. The parking brake knob(s) should pop out at approximately A) 120 p.s.i. B) 100 p.s.i. C) 90 p.s.i. D) 25 - 45 p.s.i. 26. When properly adjusted, slack adjusters and pushrods should not travel more than ____ inch(es) when pulled by hand. A) one-half B) one C) two D) three 27. Before doing the walk-around portion of the the pre-trip inspection for the CDL exam, you should A) light a cigarette. B) check your phone messages. C) put the truck ignition key in your pocket. D) spit 28. Stopping distance increases A) the same as the speed increases. B) less than the speed increases. C) under a full moon. D) more than you might think it does at higher and higher speeds. 29. When descending long grades with a heavy load, the principal means of controlling your speed is A) the foot brake. B) the emergency brake. C) wind resistance. D) the friction and compression of the engine. 30. In order to properly use the engine to control speed on downgrades, you must use #2 diesel only. B) change the oil frequently. C) select the right gear before starting down the hill. D) all of the above. 31. The proper use of the foot brake on a downhill grade is to A) release the brake when you are 5 m.p.h. below your safe speed, then let your speed come back up to your safe speed and then brake to drop your speed 5 m.p.h. below your safe speed and repeat to the bottom of the grade. B) use stronger pressure as your brakes begin to fade. C) employ stab braking at 15 m.p.h. above the safe speed. D) use light, steady pressure. 32. The list of emergency equipment required for a Class A pre-trip inspection contains A) spare electrical fuses. B) a properly rated and charged fire extinguisher C) emergency warning devices such as red reflective triangles. D) all of the above. 33. You are taking the CDL pre-trip exam. If the vehicle you are inspecting uses circuit breakers instead of fuses, A) you must mention this to the examiner. B) you may disregard mentioning the spare fuses as emergency equipment. C) you must carry two fire extinguishers. D) you must carry four triangles. 34. On flatbed trailers, cargo must have at least ____ tiedown for each ____ feet of cargo and a minimum of _____ tie downs for any cargo. A) one, ten, two B) two, ten, two C) one, twenty, two D) three, twenty, two 35. When you pull the parking brake knob on a vehicle equipped with air brakes and a big puff of air escapes, the parking brakes are being applied by the force of A) air. B) springs. C) fluid. D) suction. 36. The spring brakes will apply automatically when the system air pressure is between A) 100 and 90 psi. B) 80 and 70 psi. C) 60 and 50 psi. D) 40 and 25 psi. 37. If you are driving at 60 mph and the Low Air Warning light and buzzer/beeper come on, you should A) increase your speed to 70 mph. B) downshift to increase the speed of the air compressor to pump the air system faster. C) send a text to your dispatcher. D) pull over and stop the vehicle immediately because the system is leaking and the springs brakes are likely to apply automatically. 38. When visually inspecting brakes, the linings (pads) must not be A) "dangerously thin." (This is the answer in the Kansas Manual and the correct answer on the test.) B) less than 1/4-inch. (CVSA Out-of-Service Criteria says "less than 1/4-inch.") 39. When inspecting tires, the minimum tread depth on every major groove must be A) at least 4/32-inch on the steering axle tires and 2/32-inch on all the other tires. B) as deep as the top of Washington's head when a quarter is inserted with the head pointed down into the steering tires. C) as deep as the top of Lincoln's head when a penny is inserted with the head pointed down on all other than steer tires. D) all of the above. 40. The purpose of "stab" braking is to A) keep the brakes fully applied until your vehicle comes to a stop. B) allow the wheels to start rolling before applying the brakes again. C) to regain traction from a skid and to straighten out the vehicle. D) Both B and C 41. Which of these techniques below will provide the best control on curves? A) Keep up with the car traffic in the curve. B) Downshift while you are in the curve. C) Brake and downshift while you are in the curve. D) Slow down to a safe speed before entering the curve, and accelerate slightly through the curve. 42. When pulling a combination vehicle at highway speed, you should use the trailer brake hand control A) when descending long grades. B) when the rear trailer goes into a skid. C) any time road conditions are slick. D) never. 43. The most important space to manage around your vehicle when driving at highway speed is A) the space behind you. B) the spaces to either side of you. C) the space you are driving into (front). D) overhead clearance. 44. A good way to manage space around your vehicle is to A) keep a safe following distance. B) keep up with the speed of the fastest traffic. C) avoid driving next to other vehicles. D) Both A and C 45. When using high beam headlights at night you must dim your lights within ______ feet of an oncoming vehicle and when following another vehicle within ______ feet. A) 200, 100 B) 300, 200 C) 500, 400 D) 500, 500 46. When you are being overtaken by a vehicle at night, one of the most unprofessional things you can do is A) maintain your speed and use caution. B) drop back, if necessary. C) keep plenty of space on all sides of your vehicle. D) flash your bright lights to communicate with the overtaking driver. 47. The correct response to a steer tire failure is to A) brake hard. B) use stab braking. C) stay off the brake and allow the vehicle to slow down and stop. D) drive slowly to the nearest repair shop. 48. When selecting the correct engine speed (rpm) for a gear, you must use the A) tachometer. B) speedometer. C) odometer. D) pyrometer. 49. When selecting the correct road speed (mph) for a gear, you must use the A) tachometer. B) speedometer. C) odometer. D) pyrometer. 50. When taking the road test for your CDL, you must A) make sure your cell phone headset is on your ears and the Bluetooth is working. B) wear cool sunglasses. C) use only a vehicle with an automatic transmission. D) use double-clutching if driving a vehicle with a manual transmission. 1 out of 50 Time's up
