Question

1. ____________ are the grooves in the tread of your tire that run parallel to the circumference of the tire.

a. slots.
b. sipes.
c. perpendicular grooving.
d. parallel grooving.

1. ____________ are the small, narrow grooves in the tread of your tire that run perpendicular to the circumference of the tire.

a. slots.
b. sipes.
c. parallel grooving.
d. perpendicular grooving.

1. your headlights must be turned on no later than 1/2 hour after sunset and can be turned off 1/2 hour before sunrise.

a. correct
b. incorrect

Explanation:

For question 39, parallel grooving are the grooves in the tire tread parallel to the tire's circumference. For question 40, sipes are the small, narrow grooves perpendicular to the tire's circumference. For question 41, it is a common - traffic regulation that headlights should be on no later than half an hour after sunset and can be turned off half an hour before sunrise.

Answer:

1. D. Parallel grooving.
2. B. Sipes.
3. A. Correct