CDL PRACTICE TEST (DE) - GENERAL KNOWLEDGE TEST

31. If you are driving in fog, you should not:
turn on the 4-way emergency flashers.
use high beams.
slow down.
All of the above.
32. Skids happen whenever:
the weight limit is exceeded.
tires lose their grip on the road.
ABS is not working.
dual tires come in contact with each other.
33. Passive railroad crossings:
do not have traffic control devices.
should never be crossed using a CMV.
usually have a person directing traffic.
have at least one traffic control device.
34. The parking brake:
should be used when you need to apply the brakes firmly.
should be used when driving in bad weather.
should be used whenever you park.
All of the above.
35. If your vehicle has manual transmission, to know when to shift up:
you should use a helper when you can.
you must use mirrors on both sides.
you can watch your tachometer, and shift up when your engine reaches the top of the range.
you should release the accelerator, push in the clutch, and shift to neutral at the same time.
36. To prevent rolling back when you start, if you have a manual transmission you should:
never the parking brake.
use the lowest reverse gear.
partly engage the clutch before you take your right foot off the brake.
over-accelerate.
37. Strong winds can make it difficult to stay in your lane, especially when:
coming out of tunnels.
driving alongside other vehicles.
going into tunnels.
driving at speeds below 40 mph.
38. When a vehicle is hydroplaning:
your brakes won't work.
the spray from large trucks reduces visibility.
the clutch is stuck.
the tires lose their contact with the road.
39. Under-loaded front axles:
can cause tire failure.
can improve traction.
can make the steering axle weight too light to steer safely.
All of the above.
40. The definition of Gross Vehicle Weight is:
Total weight of a single vehicle minus fuel
Total weight of cargo
Axle weight + cargo weight
Total weight of a single vehicle + cargo
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