CDL PRACTICE TEST (PA) - GENERAL KNOWLEDGE TEST
31.
Placards are:
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devices placed below a vehicle to improve traction.
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signs put inside a vehicle used to warn others of hazardous materials.
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a type of safety equipment.
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signs placed on a vehicle to identify the hazard class of the cargo.
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32.
Service lines are often coded with the color ____ to keep from getting them mixed up with the emergency line.
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yellow
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orange
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red
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blue
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33.
If you are driving a 30-foot vehicle at 55 mph, you should leave at least _____ between you and the vehicle ahead.
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4 seconds
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3 seconds
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2 seconds
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5 seconds
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34.
Hydroplaning:
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is less likely if tire pressure is low.
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can occur only if there is a lot of water on the road.
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can occur at speeds as low as 30 mph.
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can occur at speeds as low as 10 mph, if there is a lot of water.
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35.
The following are some causes of vehicle fires:
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Tight turns and gravel roads
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Tailgating while smoking
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Under-inflated tires and duals that touch
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All of the above.
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36.
Your total stopping distance consists of __________ plus reaction distance plus braking distance.
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perception distance
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passing distance
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following distance
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partial stopping distance
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37.
When driving trucks with trailers, drivers should:
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avoid making sudden movements with the steering wheel.
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push the brake pedal to the floor when braking.
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make quick lane changes.
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decrease their following distance.
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38.
If you are involved in a collision and not seriously hurt, you should:
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protect the area.
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do your best to care for the injured.
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notify the authorities.
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All of the above.
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39.
ABS (anti-lock braking system):
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always shortens your stopping distance.
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lets you drive faster.
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keeps your brakes from locking up when you brake hard.
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increases your normal braking capability.
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40.
When checking the engine compartment:
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wheels should not be chocked.
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you should put the gearshift in neutral.
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the engine should be running.
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the parking brake should be on.
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