Commercial Drivers License (General Knowledge) : Commercial Drivers License (General Knowledge)
Study concepts, example questions & explanations for Commercial Drivers License (General Knowledge)
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Example Questions
Example Question #1 : Safety Practices
If your vehicle has been involved in an accident, the best way to help prevent another accident as cars pass the site is to _____________.
Sit still in the cab of your vehicle
Run, as far and as fast as your legs will carry you
Put out highly visible warning flags, markers, or devices on the road for passing cars to see
Leave your vehicle and seek the high ground to wave at coming cars
Put out highly visible warning flags, markers, or devices on the road for passing cars to see
The best thing to do is, rather obviously, to place markers on the road to help other cars avoid running into the accident site. Leaving the car and signaling with your arms is nowhere near as efficient as a highly visible, and well-placed marker.
Example Question #1 : Road Conditions
In judging the safe speed on a deep downgrade, one must consider all of the following except ________________.
how heavy the vehicle and cargo are combined
how fragile the cargo inside the vehicle is
the quality and condition of the road
how steep the grade is
how fragile the cargo inside the vehicle is
In assessing your safe speed on a downgrade, your primary concern must be the safety of yourself and the other drivers or pedestrians nearby. The fragile nature of your cargo is far from the greatest concern, as compared to safe travel for all humans involved or nearby.
Example Question #2 : Road Conditions
A hazard is ________________.
a road condition that could potentially cause danger
any road condition or driver that could potentially cause danger
a term for materials that are toxic or flammable
not a relevant term related to commercial vehicle safety
any road condition or driver that could potentially cause danger
Hazard is a broad term that refers to any road condition or driver that could potentially cause danger. Hazardous materials are toxic or flammable. A patch of ice and a drunk driver are both considered hazards, by this definition.
Example Question #1 : Fires
Which of the following is the most common cause of tire fires?
Tires that are insufficiently inflated
None of these
Tires that are over-inflated
Tires that are made with a deficient grade of rubber
Tires that are insufficiently inflated
Under-inflated tires are the single most common cause of tire fires, especially for heavy and commercial vehicles. Over-inflated tires, while posing obvious safety concerns, do not pose as great a risk for fires specifically as do under inflated tires.
Example Question #1 : Hazards
Which of the following is the most reliable method for someone who has consumed alcohol to regain sobriety?
Taking a brisk walk
Drinking several glasses of water
Drinking one cup of coffee per serving of alcohol you consume
The passage of time
The passage of time
While some of the other methods may be considered anecdotally useful, BUT in the eyes of the law (and the BAC counter), the only foolproof method of sobering up is simply to wait an appropriate amount of time.
Example Question #5 : Commercial Drivers License (General Knowledge)
What is the minimum number of tiedowns for a 20-foot load?
1
4
5
2
2
This is a simple rule knowledge question. The rule is 1 tiedown per 10 feet, in all cases.
Example Question #1 : Inspection
Under which of the following conditions is it safe to remove the radiator cap on your vehicle?
The entire engine system is completely cooled
The radiator is undamaged and the engine is warm
None of these; the radiator cap should never be removed
The engine is not overheated, but the engine has been in recent use
The entire engine system is completely cooled
In order for it to be remotely safe to remove your radiator cap, the entire engine system must be completely cooled. Even in that condition, removing the radiator cap should be only be done with extreme caution.
Example Question #1 : Shifting Gears
In order to correctly and safely shift gears, you should NOT _________________.
accelerate while releasing the clutch
accelerate before initially pressing in the clutch
shift into a higher gear while pushing in the clutch
release the clutch
accelerate before initially pressing in the clutch
The basics of shifting gears are as follows: release the accelerator, push the clutch, shift into neutral, release the clutch, let the engine and gears slow sufficiently, then push in the clutch and shift into the appropriate higher gear, release the clutch and LAST press the accelerator. Pressing your accelerator should always be the last step in this process.
Example Question #1 : Space Management
Stopping distance is _________________.
the same thing as perception distance
the sum total of the perception, reaction, and braking distances
the sum total of the perception and braking distance
the same thing as braking distance
the sum total of the perception, reaction, and braking distances
This is a simple definition question. Stopping distance is the combination of all the stopping related distances, perception, reaction, and braking.
Example Question #1 : Driving In Winter
If, on a clear and dark winter's evening, you are driving, and the temperature suddenly drops far below freezing, about which of the following areas should you be most cautious?
None of these
A bridge
The middle of your lane of traffic
Clear, open highway
A bridge
Once the temperature dips below freezing, you should just become generally more cautious/vigilant for slippery areas of the road. But, the MOST dangerous area of the ones listed is clearly bridges, which are among the first areas of the road to gather thin slippery layers of ice.
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