SD CDL - South Dakota Commercial Drivers License Pre-Trip Vehicle Inspection Questions and Answers

Question 1

During the in-cab portion of the pre-trip inspection, what is the minimum required tread depth for the front steering axle tires?

Accepted Answer

4/32 inch

Answer

2/32 inch

Answer

6/32 inch

Answer

It is not required to check tread depth during the in-cab inspection.

Question 2

A driver performing a pre-trip inspection on a vehicle with air brakes notices that the low-pressure warning light and buzzer activate. At or before what pressure must this warning occur?

Accepted Answer

55 PSI

Answer

90 PSI

Answer

100 PSI

Answer

20 PSI

Question 3

Which of the following items is NOT a required piece of emergency equipment that must be checked during a pre-trip inspection?

Accepted Answer

A first-aid kit

Answer

A properly rated and fully charged fire extinguisher

Answer

Three red reflective triangles

Answer

Spare electrical fuses (unless the vehicle uses circuit breakers)

Question 4

When inspecting the steering system, what is the maximum amount of acceptable play or 'slack' in a 20-inch steering wheel?

Accepted Answer

2 inches

Answer

4 inches

Answer

1 inch

Answer

3 inches

Question 5

A driver is about to begin their pre-trip inspection for the day. Before inspecting any components, what is the very first step they must legally take according to 49 CFR 396.13?

Accepted Answer

Review the previous driver's Driver Vehicle Inspection Report (DVIR).

Answer

Start the engine to build air pressure.

Answer

Check the oil and coolant levels.

Answer

Ensure the vehicle is clean.

Question 6

During the walk-around inspection of a combination vehicle, what is a critical check for the fifth wheel assembly after coupling to a trailer?

Accepted Answer

Verifying that the locking jaws are fully closed around the kingpin and the release handle is in the locked position.

Answer

Ensuring the fifth wheel is freshly painted.

Answer

Checking that there is a visible gap between the fifth wheel and the trailer apron.

Answer

Confirming the air lines have been painted red and blue.