MINNESOTA CDL PRACTICE TEST - GENERAL KNOWLEDGE

21. The spring brakes come on:
when you bring the vehicle to a complete stop right away.
when main air pressure is lost.
when air pressure in both air brake systems rises to a value set by the manufacturer.
when you lose ABS control.
22. To determine a safe speed for a downgrade, you should consider:
Trip origin and destination city.
Oncoming traffic.
The total weight of the vehicle and cargo.
All of the above.
23. What is a common cause of tire fires?
Cold tires
Loose lug nuts
Duals that touch
All of the above.
24. Fatigue:
increases the chance of an accident.
does not impair vision and judgment.
can easily be prevented by drinking coffee.
has little or no effect on driving.
25. Which of these should you check before driving in winter?
Windshield wiper blades
Defrosters
Coolant level and antifreeze amount
All of the above.
26. Which surface is the most slippery?
Wet ice
Dry road
Ice that is not wet
Wet pavement
27. To make sure you always have overhead clearance, always be aware that:
some roads can cause a vehicle to tilt.
re-paving or packed snow may have reduced the clearances since the heights were posted at bridges and overpasses.
an empty vehicle is taller than a loaded one.
All of the above.
28. Which of the following is true about high beams?
You should use them when you are not within 50 feet of an approaching vehicle.
Using them seriously cuts down on your ability to see ahead.
They should be used only if low beams suddenly stop working.
High beams should be used when it is safe and legal to do so.
29. You have two tie-downs on a 15 foot load. How many more tie-downs do you need to secure cargo and keep it from shifting or falling?
One
Three
None
Two
30. Which of the following trailers can get stuck on raised crossings?
Lowboy
Car carrier
Moving van
All of the above.
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