DMV Class B License: General Knowledge Test Latest Updated Graded A+

CDL medical certificates must be renewed every: a) Year b) Two Years c) Four years - ANSWER-b) Two Years What should you do when you are driving at night? a) Make sure you are driving slow enough so you can stop within the range of your headlights in an emergency b) Roll down your windows so that the fresh air will help keep you awake c) If you are sleepy, drink coffee or other caffeine products - ANSWER-a) Make sure you are driving slow enough so you can stop within the range of your headlights in an emergency What are three things that add up to the total stopping distance for your truck or bus? a) Attention distance, Reaction distance, slowing distance b) Observation distance, response distance, braking distance c) Perception distance, reaction distance, braking distance - ANSWER-c) Perception distance, reaction distance, breaking distance You are checking your steering and exhaust systems in a pre-trip inspection. Which of these problems, if found, should be fixed before the vehicle is driven? a) Oil on the rod b) Black smoke from the exhaust pipe c) Steering wheel play of more than 10 percent (2'' on a 20'' steering wheel) - ANSWER-c) Steering wheel play of more than 10 percent (2'' on a 20'' steering wheel) The purpose of retarders is to: a) Apply extra braking power to the non-drive vehicles b) Help prevent skids c) Help slow the vehicle while driving and reduce brake wear - ANSWER-c) Help slow the vehicle while driving and reduce brake wear Which of these is especially true about your tires in hot weather? a) You should check tire mounting and air pressure before driving b) If the tire is too hot to touch, you should hose it down with water c) A small amount of air should be let out so air pressure remains steady - ANSWER-a) You should check tire mounting and air pressure before driving Which of these is usually true about driving in tunnels? a) Headlights are required by law b) There may be strong winds when exiting c) Speeds are limited to 30 MPH or less - ANSWER-b) There may be strong winds when exiting When driving through work zones, you should: a) Reduce speed only if workers are close to the roadway b) Turn on your parking lights c) Watch for sharp pavement drop-off - ANSWER-c) Watch for sharp pavement drop-off A pre-trip inspection should be completed: a) At least once a week b) If any problems occurred the last time the vehicle was operated c) Before operating the vehicle - ANSWER-c) Before operating the vehicle Water can be safely used on which of these fires? a) Electrical b) Gasoline c) Neither of the above - ANSWER-c) Neither of the above What should you do when your vehicle hydroplanes? a) Start stab braking b) Release the accelerator c) Accelerate slightly - ANSWER-b) Release the accelerator If you are stopped on a one-way or divided highway, you should place reflective triangles at: a) 10 feet, 100 feet, 200 feet toward approaching traffic b) 25 feet, 100 feet, 250 feet toward approaching traffic c) 50 feet, 100 feet, 300 feet toward approaching traffic - ANSWER-a) 10 feet, 100 feet, 200 feet toward approaching traffic You are driving a new truck with a manual transmission. What gear will you probably have to use to take a long, steep, downhill grade? a) The same gear you would use to climb the hill b) A lower gear than you would use to climb the hill c) A higher gear than you would use to climb the hill - ANSWER-b) A lower gear than you would use to climb the hill Which of the following is the correct term for a long commercial vehicle's tendency to swing wide on turns? a) Sidetracking b) Offtracking c) Fishtailing - ANSWER-b) Offtracking Which of these is true about your overhead clearance? a) Paving the road does not affect the clearance height under bridges or overpasses b) The weight of cargo can change the height of your vehicle c) Warnings are always posted for low clearance areas like bridges and overpasses - ANSWER-b) The weight of cargo can change the weight of your vehicle When you are parked at the side of the road at night, you must? a) Warn others by turning on your 4-way emergency flashers b) Put your warning devices out within 15 minutes c) Use your left turn signal lights to give warning to other drivers - ANSWER-a) Warn others by turning on your 4-way emergency flashers If you need to leave the road in a traffic emergency, you should: a) Try to get all wheels of the pavement b) Avoid braking until your speed has dropped to about 20 MPH c) Avoid the shoulder because most shoulders will not support a large vehicle - ANSWER-b) Avoid braking until your speed has dropped to about 20 MPH Which of these lights cannot be checked at the same time? a) Headlights, brake lights, and clearance lights b) Turn signals, taillights, and clearance lights c) Turn signals, brake lights, and four-way flashers - ANSWER-c) Turn signals, brake lights, and four-way flashers Which of these is correct about emergency or evasive action a) Stopping is always the safest thing to do in an emergency b) In order to turn quickly, you must have a firm grip on the steering wheel c) You can usually stop more quickly than you can turn to miss an obstacle - ANSWER-b) In order to turn quickly, you must have a firm grip on the steering wheel Containerized loads: a) Are exempt from hazardous materials restrictions b) Are exempt from weight limit restrictions c) Generally are used when freight is carried part way by rail or ship - ANSWER-c) Generally are used when freight is carried part way by rail or ship Which of these is true about bad weather and driving conditions? a) When the temperature drops, bridges will freeze before roads will b) The road is more slippery as rain continues than when rain begins c) Driving conditions become more dangerous as the temperature rises above freezing - ANSWER-a) When the temperature drops, bridges will freeze before roads will To determine blood alcohol concentration (BAC) for a person, it is necessary to know: a) How often the person drinks alcohol (tolerance level) b) How much the person weighs c) How old the person is - ANSWER-b) How much the person weighs Which of these happens when a tire blows out at highway speeds? a) A vibrating feeling b) A hissing sound c) A rapid drop in speed to less than 20 MPH - ANSWER-a) A vibrating feeling You are driving a 40' vehicle at 35 MPH. The road is dry and the visibility is good. What is the least amount of space that you should keep in front of your vehicle to be safe? a) 3 seconds b) 4 seconds c) 5 seconds - ANSWER-b) 4 seconds Truck escape ramps: a) Cannot be used by certain types of heavy vehicles b) Are not for buses c) Help avoid damage to vehicles - ANSWER-c) Help avoid damage to vehicles Which of these is NOT checked in a pre-trip inspection? a) Whether all vehicle lights are working and are clean b) Cargo securement c) Amount of fuel in vehicle - ANSWER-c) Amount of fuel in vehicle Which of these should receive extra attention during a winter weather inspection? a) Exhaust b) Suspension c) Steering - ANSWER-a) Exhaust The total weight of a powered unit, the trailer, and the cargo is called: a) Gross vehicle weight b) Gross combination weight c) Gross axle weight - ANSWER-b) Gross combination weight Which statement is true? a) Most people are more alert at night than during the day b) Most hazards are easier to see at night than during the day c) Many heavy vehicle accidents occur between midnight and 6 am - ANSWER-c) Many heavy vehicle accidents occur between midnight and 6 am Which of these statements is true about cargo types? a) Unstable loads (i.e. hanging meat, livestock) require extra caution on curves b) Oversize loads can be transported without special permits when roadways are not busy c) Tank vehicles used to transport liquids should always be fully loaded - ANSWER-a) Unstable loads (i.e. hanging meat, livestock) require extra caution on curves Which of these statements is true about rear drive wheel braking skids? a) Locked wheels usually have more traction that rolling wheels b) Front wheels slide sideways to try to "catch up" with rear wheels