CDL PRACTICE TEST - GENERAL KNOWLEDGE (PENNSYLVANIA)
41.
Most heavy-duty vehicles use:
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triple air brake systems.
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single air brake systems.
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dual air brake systems.
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pump-the-brake systems.
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42.
You as a driver should always:
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stay in your lane.
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make emergency plans when you see a hazard.
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drive slowly in the left lane of traffic.
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reduce your following distance.
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43.
Emergency brakes must be held on by:
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mechanical force.
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dynamic pressure.
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air pressure.
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hydraulic pressure.
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44.
A driver distraction is anything that takes your attention away from driving, such as:
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billboards.
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pedestrians.
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adjusting the radio.
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All of the above.
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45.
If your vehicle is equipped with a front brake limiting valve, to ensure normal stopping power make sure the control is:
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in the "slippery" position.
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in the "normal" position.
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in the "neutral" position.
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in the "off" position.
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46.
ABS:
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helps you avoid wheel lock up.
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makes it easier to turn.
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allows the wheels to lock up.
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makes it easier to break.
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47.
What should you do if you doubt you have safe space to pass under a low bridge?
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Increase the weight of your vehicle to clearing under the bridge.
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Go slowly, and take another route if you are not sure you can make it.
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If no warnings are posted, assume there is enough clearance under the bridge and proceed slowly.
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Assume that the height posted at the bridges is correct.
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48.
If brakes fail on a long downgrade, you should:
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pump the brake pedal 3 times.
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set the parking brake.
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use an escape ramp if it is available.
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turn off the engine as soon as you.
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49.
Radial and bias-ply tires:
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should be used together only during bad weather.
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should be used together.
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should be used together only when driving in packed snow.
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should not be used together.
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50.
Which of the following statements about driving in areas with strong winds is true?
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Strong winds make it difficult to stay in your lane.
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The problem is usually worse for heavier vehicles.
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You should drive alongside other vehicles to help break up the wind.
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Wind can be a problem especially when you enter a tunnel.
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