DMV CDL Class B License General Knowledge Test 2027 | Complete Questions and Guide Answers, 100% Verified Graded A+

DMV CDL Class B License General Knowledge Test 2027 | Complete Questions and Guide Answers, 100% Verified Graded A+ 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?