PennDOT Commercial Driver's License 3

Question 1

When backing a tractor-trailer, a driver should primarily use which mirrors?

Accepted Answer

Both side mirrors and get out to check when uncertain

Answer

Drivers should use both side mirrors and physically check the area (get out and look) when uncertain to ensure safety while backing.

Question 2

What is the maximum allowable blood alcohol content (BAC) for CDL holders operating a commercial motor vehicle?

Accepted Answer

0.04%

Answer

The legal BAC limit for CDL drivers operating a CMV is 0.04%, half the standard limit for non-commercial drivers.

Question 3

Which of the following describes a 'runaway truck ramp' and when it should be used?

Accepted Answer

An escape ramp used when brakes fail on a downgrade

Answer

A runaway truck ramp is an emergency escape route filled with sand or gravel designed to stop a truck with failed brakes on a steep downgrade.

Question 4

What is the correct procedure for using the spring brakes when parking a CMV?

Accepted Answer

Chock the wheels and apply the parking brake

Answer

Drivers should chock the wheels and fully apply the parking (spring) brake to prevent the vehicle from rolling while parked.

Question 5

Under federal hours-of-service rules that apply in Pennsylvania, property-carrying CDL drivers may not drive after being on duty for how many cumulative hours in 8 days?

Accepted Answer

70 hours

Answer

Under the 8-day/70-hour rule, property-carrying drivers may not drive after accumulating 70 on-duty hours in any 8 consecutive days.

(PennDOT) Pennsylvania Department of Transportation Practice Test

(PennDOT) Pennsylvania Department of Transportation Practice Test

PennDOT Commercial Driver's License 3