Safety
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Commercial Driver's License (General Knowledge) › Safety
Stopping distance is .
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 same thing as perception distance
Explanation
This is a simple definition question. Stopping distance is the combination of all the stopping related distances, perception, reaction, and braking.
Stopping distance is .
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 same thing as perception distance
Explanation
This is a simple definition question. Stopping distance is the combination of all the stopping related distances, perception, reaction, and braking.
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?
A bridge
Clear, open highway
The middle of your lane of traffic
None of these
Explanation
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.
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
The engine is not overheated, but the engine has been in recent use
None of these; the radiator cap should never be removed
Explanation
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.
In order to correctly and safely shift gears, you should NOT .
accelerate before initially pressing in the clutch
release the clutch
shift into a higher gear while pushing in the clutch
accelerate while releasing the clutch
Explanation
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.
Which of the following is NOT a valid indicator that your vehicle is equipped with an Antilock Braking System?
The presence of a speedometer with both miles and kilometers per hour
The presence of a yellow malfunction lamp on the panel
A manufacture date from AFTER March 1, 1998
The presence of wheel speed sensor wires emanating from the back of your brakes
Explanation
The main indicator that your vehicle is equipped with an ABS is the yellow malfunction light in your instrument panel. If your vehicle is to code, and it was produced after March 1998 it should be equipped with an ABS. Also, you can always just physically get out of the cab and look at the back of your brakes for the telltale presence of wheel speed sensor wires. Your speedometer indicating both miles and kilometers per hour is not related to your ABS (it may mean your truck was manufactured in Canada).
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?
A bridge
Clear, open highway
The middle of your lane of traffic
None of these
Explanation
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.
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
The engine is not overheated, but the engine has been in recent use
None of these; the radiator cap should never be removed
Explanation
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.
A hazard is .
any road condition or driver that could potentially cause danger
a road condition that could potentially cause danger
not a relevant term related to commercial vehicle safety
a term for materials that are toxic or flammable
Explanation
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.
If your vehicle has been involved in an accident, the best way to help prevent another accident as cars pass the site is to .
Put out highly visible warning flags, markers, or devices on the road for passing cars to see
Run, as far and as fast as your legs will carry you
Leave your vehicle and seek the high ground to wave at coming cars
Sit still in the cab of your vehicle
Explanation
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.