NC DMV Weather and Hazardous Conditions 2

Question 1

You are driving on I-40 when heavy fog suddenly reduces visibility to near zero. What is the safest action?

Accepted Answer

Pull completely off the road, stop, and turn on hazard lights

Answer

In near-zero visibility you should pull completely off the roadway, stop, and use hazard lights until conditions improve.

Question 2

Why does a road become most slippery during the first 10 to 15 minutes of rainfall?

Accepted Answer

Rain mixes with oil and dust on the surface, forming a slick film

Answer

The first minutes of rain lift accumulated oil and dirt off the pavement, creating an especially slick film before it washes away.

Question 3

Your vehicle begins to hydroplane on a wet highway. What should you do first?

Accepted Answer

Ease off the accelerator and avoid braking suddenly

Answer

Easing off the gas lets the tires slow and regain contact with the road, while hard braking or steering can cause a skid.

Question 4

At approximately what speed can hydroplaning begin on wet roads with worn tires?

Accepted Answer

As low as 35 mph

Answer

With standing water and poor tread, tires can begin riding on water at speeds as low as about 35 mph.

Question 5

Which part of the road typically freezes first in cold weather?

Accepted Answer

Bridges and overpasses

Answer

Bridges and overpasses freeze first because cold air circulates both above and below the road surface.

(NC DMV) North Carolina Department of Motor Vehicle Practice Test