AL DMV Commercial Driver's License 4

Question 1

You are driving a truck with a manual transmission and need to cross railroad tracks. What should you avoid doing?

Accepted Answer

Shifting gears while crossing the tracks

Answer

Never shift gears while crossing railroad tracks because a stall or hesitation could leave you stranded on the rails.

Question 2

What is the minimum amount of time a driver must wait before driving after their off-duty period begins under the 10-hour rule for property carriers?

Accepted Answer

10 consecutive hours off duty

Answer

Property-carrying drivers must take 10 consecutive hours off duty before driving again under federal hours-of-service rules.

Question 3

When parked on the shoulder of a highway, within what time must you place your warning devices?

Accepted Answer

Within 10 minutes

Answer

Warning devices such as reflective triangles must be placed within 10 minutes of stopping on the roadway or shoulder.

Question 4

Hydroplaning is most likely to occur under which condition?

Accepted Answer

Heavy rain with worn tires and higher speeds

Answer

Hydroplaning happens when water builds between the tires and road, worsened by speed, low tread, and standing water.

Question 5

You must stop 15 to 50 feet before railroad tracks if your vehicle is carrying which of the following?

Accepted Answer

Placarded hazardous materials

Answer

Vehicles carrying placarded hazardous materials, and buses, must stop 15 to 50 feet before railroad crossings.

(AL DMV) Alabama Department of Motor Vehicle Practice Test