Drivers Ed: test 3

When braking hard, the weight of the vehicle noticeably shifts...

To the front of your vehicle

List for substances that can reduce traction between a vehicle tires in the roadway.

1. Paint 2. Mud 3. Tar 4. Wet leaves

List and explain the factors that affect traction between a vehicles tires and the roadway surface.

1. Substances on the road - substances on the road can reduce tractions (be alert for things like sewer covers, paint, wet leaves, etc.) 2. Surface conditions - poor road conditions such as rippled surfaces or potholes contribute to loss of traction. Be alert when roads are wet can cause a driver to hydroplane. 3. Surface materials - concrete, asphalt, brick, dirt, gravel, sand, etc. 4. Road design - can affect traction based on style crowned (higher in the middle) and banked (a curve).

To allow enough distance to stop in response to threatening objects and conditions, you should identify a plant path of travel _____ seconds ahead.

12-15 seconds

Hydroplaning

Hydroplaning occurs when the tires rise up on a wedge of water

Explain the effects of uphill and downhill roadway sections on traveling speed, acceleration ability, and breaking ability.

1. Traveling speed- you must maintain a constant traveling speed to prevent risk while driving uphill or downhill. 2. Acceleration ability- you need to be able to accelerate or you can use traction when going uphill 3. Braking ability- you need to break to stop the vehicle, especially when going downhill; three control of the brakes to avoid collision or risk

Under most conditions a minimum following interval of _____ will enable you to adjust speed or position appropriately

3-4 seconds

If a vehicle speed doubles from 20 mph to 40 mph, distance needed to stop the vehicle increases by ____ times

4 times

How can you prevent hydroplaning.

Drivers can prevent it by being alert while on the road during/after rain and watch your speed while driving in these conditions.

When turning to the right, the contact patches of the ____ will increase in size

Left side tires

Explain the relationship between inertia and traction

Traction is affected by inertia. Simply stated, and object in motion continues to move straight ahead until acted upon by some outside force. This force creates a problem when a driver change is a vehicles direction to suddenly.