MO CDL Practice Test
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Questions and Answers

Which of the following is most likely to get stuck on raised railroad crossings?

  • A low-slung car carrier. (correct)
  • An empty moving van.
  • A single axle tractor making a return journey empty.
  • A single axle tractor pulling a regular trailer.

    • Is it true that as long as the engine is not overheated it is completely safe to remove the radiator cap?

    False

    Which of the following should you do when confronted by an aggressive driver?

  • If you can safely do it, call the police from a cell phone.
  • Avoid eye contact.
  • All the above (correct)
  • Ignore rude gestures and refuse to react negatively.

    • Retarders keep you from skidding on the road because...

    <p>They don't - you skid more easily with retarders.</p> Signup and view all the answers

    If you have an automatic transmission, when should you downshift?

    <p>When you're going down steep grades.</p> Signup and view all the answers

    What happens when you let the air out of hot tires?

    <p>This is a bad idea because when the tires cool off, the pressure will be too low.</p> Signup and view all the answers

    What is the main difference between aggressive driving and road rage?

    <p>Intent to do harm or physical assault.</p> Signup and view all the answers

    Which of the following is NOT a key steering component?

    <p>Leaf spring.</p> Signup and view all the answers

    Under which of the following situations will you NOT lose your hazardous materials endorsement in the state of Missouri?

    <p>You have unpaid parking tickets.</p> Signup and view all the answers

    The minimum safe tread depth for other tires besides front tires is...

    <p>2/32-inch.</p> Signup and view all the answers

    Which of the following should you check during your trip?

    <p>All of the above.</p> Signup and view all the answers

    Where should you place your warning devices if you must stop on a one-way or divided highway?

    <p>10 feet, 100 feet, and 200 feet toward approaching traffic.</p> Signup and view all the answers

    What action should you do before driving while drowsy?

    <p>Pull off the road and get some sleep.</p> Signup and view all the answers

    What is the most important and obvious reason to perform a vehicle inspection, according to the state of Missouri?

    <p>Safety.</p> Signup and view all the answers

    How can you start moving without rolling backward?

    <p>All of the above.</p> Signup and view all the answers

    How many tiedowns are required for a 20-foot load?

    <p>2 tiedowns</p> Signup and view all the answers

    Which of these constitutes communicating safely?

    <p>All of the above.</p> Signup and view all the answers

    If you are traveling at 55 mph in a 30-foot vehicle, you should leave how many seconds of following distance?

    <p>4 seconds.</p> Signup and view all the answers

    Which of these combinations defines total stopping distance?

    <p>Perception Distance + Reaction Distance + Braking Distance.</p> Signup and view all the answers

    You should place the starter switch key into your pocket while you are performing the pre-trip inspection because...

    <p>Someone could start and move the truck.</p> Signup and view all the answers

    Which of the following is/are part(s) of the suspension system?

    <p>Bearing plates.</p> Signup and view all the answers

    What is the punishment for driving a CMV without a CDL?

    <p>Up to $5000 fine or possible jail time.</p> Signup and view all the answers

    An Anti-Lock Braking System will:

    <p>Keep your brakes from locking up when you brake hard.</p> Signup and view all the answers

    If you double your speed, how much more distance will it take to stop?

    <p>Four times as much.</p> Signup and view all the answers

    What is the first step of proper braking technique when going down a steep downgrade?

    <p>Put the engine in the proper low gear.</p> Signup and view all the answers

    Do empty trucks have the best braking?

    <p>False</p> Signup and view all the answers

    You should inspect wheel bearing seals for...

    <p>Leaking.</p> Signup and view all the answers

    What is a common cause of tire fires?

    <p>Under-inflated tires.</p> Signup and view all the answers

    How many seconds does it take for a normal tractor-trailer to clear a double track?

    <p>More than 15 seconds.</p> Signup and view all the answers

    Which two special conditions indicate that you should downshift?

    <p>Starting down a hill and entering a curve.</p> Signup and view all the answers

    Which of the following is/are reason(s) to back toward the driver's side?

    <p>You can see better, watching the vehicle rear out the side window.</p> Signup and view all the answers

    How many red reflective triangles must you carry with you for emergencies?

    <ol start="3"> <li></li> </ol> Signup and view all the answers

    It has just reached freezing. Which of the following areas is slippery?

    <p>All of the above.</p> Signup and view all the answers

    What's the definition of a hazard?

    <p>A road user or road condition that could be a possible danger.</p> Signup and view all the answers

    You don't want to be a distracted driver, so you...

    <p>If possible, turn off your cell phone until you reach your destination.</p> Signup and view all the answers

    How can you determine if your vehicle is equipped with ABS?

    <p>All of the above.</p> Signup and view all the answers

    Which of these is a serious traffic violation that will disqualify you from a commercial vehicle?

    <p>Excessive speeding (15 mph or more faster than posted limit).</p> Signup and view all the answers

    What will help a drunk sober up?

    <p>Time.</p> Signup and view all the answers

    What might happen if you swing wide to the left before you turn right?

    <p>Someone might try to pass you on your right.</p> Signup and view all the answers

    How long will you lose your CDL privileges, in the state of Missouri, if you are convicted of a second DUI offense while driving your CMV?

    <p>Life.</p> Signup and view all the answers

    The most important hand signal you should agree on with a helper is...

    <p>Stop.</p> Signup and view all the answers

    Why is it important to use a helper when backing?

    <p>Because you have blind spots.</p> Signup and view all the answers

    If testing your hydraulic brakes for leaks, you should...

    <p>Pump the brakes 3 times, then apply pressure for 5 seconds.</p> Signup and view all the answers

    Which of the following determines the safe speed for going down a steep downgrade?

    <p>All of the above.</p> Signup and view all the answers

    Which of the following can you NOT use a B:C fire extinguisher on?

    <p>Wood.</p> Signup and view all the answers

    Which of the following should you NOT do when you are being tailgated?

    <p>Speed up.</p> Signup and view all the answers

    What is the best way to figure out how many seconds of following distance you have?

    <p>Wait until a vehicle passes a shadow or landmark, and count the seconds until you pass it.</p> Signup and view all the answers

    What is the best way to check the sides and rear of your vehicle?

    <p>Adjust your mirrors to see clearly before starting, and check regularly.</p> Signup and view all the answers

    How many hours of sleep does the average person need per night, or risk accumulating 'sleep debt'?

    <p>7 to 8 hours</p> Signup and view all the answers

    If brakes get wet, it can cause them to...

    <p>Apply unevenly.</p> Signup and view all the answers

    Study Notes

    Driving Safety and Regulations

    • Low-slung car carriers are most likely to get stuck on raised railroad crossings.
    • It's unsafe to remove the radiator cap while the engine is not overheated; it should only be done when the engine is cool.
    • When confronted by aggressive drivers, maintain composure; ignore gestures, avoid eye contact, and consider contacting authorities if safe.

    Vehicle Controls and Features

    • Retarders do not reduce skidding; they can lead to increased skidding.
    • Downshift an automatic transmission primarily when going down steep grades.
    • Never let air out of hot tires, as it will result in low pressure once they cool.
    • Aggressive driving differs from road rage by intent to cause harm.
    • Leaf springs are not a key steering component; focus on steering shafts, gearboxes, and tie rods instead.
    • Unpaid parking tickets do not lead to loss of hazardous materials endorsement in Missouri; felony convictions do.

    Tire and Vehicle Inspection Standards

    • The minimum safe tread depth for non-front tires is 2/32 inch.
    • During trips, regularly check pressure gauges, mirrors, and cargo covers.
    • Place warning devices 10, 100, and 200 feet toward approaching traffic if stopping on a one-way or divided highway.

    Driving Techniques and Safety Measures

    • Always pull off the road and rest if you feel drowsy; caffeinated beverages won't suffice.
    • The primary reason for vehicle inspections is safety; ensure all components are functioning.
    • Engage the clutch before releasing the brake to prevent rolling back on inclines.

    Load Security and Visibility

    • For a 20-foot load, at least 2 tiedowns are required for secure transportation.
    • Communicate safely by using headlights and horns when necessary.
    • Maintain a following distance of 4 seconds when driving at 55 mph in a 30-foot vehicle.

    Stopping Distance and Speed Management

    • Total stopping distance is determined by perception, reaction, and braking distances.
    • During pre-trip inspections, keep the starter key secure to prevent unauthorized vehicle operation.
    • Utilize the proper low gear when braking on steep declines for safety.

    Traffic Violations and Criminal Justices

    • Driving a commercial motor vehicle (CMV) without a CDL may result in up to $5000 in fines or potential jail time.
    • An Anti-Lock Braking System (ABS) keeps brakes from locking up during hard braking, enhancing control.
    • Doubling speed increases stopping distance by four times the original distance.

    Weather and Environmental Considerations

    • Areas shaded by trees, bridges, and wet-looking roads can be slippery after freezing temperatures.
    • Recognize hazards as potential dangers posed by road users or conditions.
    • Avoid distractions while driving; consider turning off mobile devices to maintain focus on the road.

    Pre-Trip Inspection and Traffic Awareness

    • Check hydraulic brakes for leaks by pumping them thrice and holding firm pressure for 5 seconds.
    • The safe speed for descending steep downgrades depends on the grade's steepness, road conditions, and vehicle weight.
    • Always check your surroundings before backing up; blind spots can obscure visibility.

    Health and Emergency Preparedness

    • Accumulate 7 to 8 hours of sleep per night to avoid sleep debt.
    • Wet brakes can cause uneven application, leading to potential accidents.
    • Carry three red reflective triangles for emergencies to enhance roadside safety.

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    Description

    Prepare for your Commercial Driver's License with this MO CDL practice test quiz. Test your knowledge on crucial driving scenarios and vehicle operation principles. Each question is designed to challenge your understanding and readiness for the CDL examination.

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