CDL Info

Question 1

What age must be be to obtain your CDL?

Answer 1

18 if in state 21 if interstate

Question 2

What defines a Commercial type vehicle?

Answer 2

Single vehicle with a GVWR of 26001 lbs, Combination vehicle of 26001lbs or more and a trailer of 10000lbs or more, 16 or more passengers, Carrier of hazardous materials that require placarding.

Question 3

Vision standards?

Answer 3

20/40 vision and 140 degrees of horizontal vision

Question 4

What is a pre-trip inspection?

Answer 4

Helps you find problems that might cause a future breakdown or crash.

Question 5

Minimum tread depth for steer tires?

Answer 5

4/32”

Question 6

There should be atleast 2/32” tread on all tires except the steer tires with no major cuts or damage? T/F

Answer 6

True

Question 7

Rust around lug nuts would indicate what?

Answer 7

Loose lug nuts

Question 8

Slack adjusters on the brake system should be no more than how many degrees when applied?

Answer 8

90°

Question 9

Steering wheel play should be no more that ____ degrees or ___ inches on a 20inch wheel?

Answer 9

10 degrees either way or 2 inches

Question 10

Vehicle must be equipped with the following per the CDL manual for safety equipment.

Answer 10

Fire extinguisher
Spare electrical fuses
Three reflective triangles as warning devices

Question 11

Air brakes should not drop more that ___ psi when brake is applied for one minute?

Answer 11

3psi

Question 12

At what Psi will the low air light and or buzzer come on?

Answer 12

60psi

Question 13

At about what psi will the parking brake knob pop out to apply the brakes?

Answer 13

40psi

Question 14

While traveling at 40mph maintain atleast one second for every how many feet of vehicle?

Answer 14

10feet

Question 15

Add speed over 40mph how much time should you add?

Answer 15

1 second to make it 2 seconds per 10ft

Question 16

Countersteering is turning the wheel back in the other direction after steering to avoid a traffic emergency. True/False

Answer 16

True. Try not to over steer

Question 17

In wet or slippery road conditions vehicle orvengine retarders should always be used?

Answer 17

False

Question 18

When the brake is released, about how much “slack” should be in the slack adjuster?

Answer 18

1 inch

Question 19

When the engine rpm is at an idle, air pressure should build from 85 to 100psi in how much time?

Answer 19

45 seconds

Question 20

Braking distance?

Answer 20

Time it takes to come to a complete stop once the brakes are applied

Question 21

Brake lag distance?

Answer 21

The distance from the time you start to apply the brake until the brakes start to take hold.

Question 22

Reaction distance?

Answer 22

The distance traveled from the time your brain tells your foot to move from the accelerator to the brake pedaland pushes the brake.

Question 23

Perception distance

Answer 23

Distance your vehicle travels from the time you see a hazard till the time your brain recognizes the hazard