Ace Your DMV Written Test with our Guaranteed Cheat Sheet.
Cheat Sheet

Iowa CDL Permit Test - Knowledge Test Class B

(From the 2020 Iowa CDL driver handbook)
Number of questions: 50
Passing score: 40
Directions: This license is required for driving a single vehicle with a GVWR of more than 26,001 pounds, and a trailer not to exceed 10,000 pounds gross vehicle weight rating, or a vehicle designed to transport 24 or more people (including the driver). To receive this license, applicants must pass a 50-question test. To pass, applicants must answer 40 questions correctly. Each question has three or four possible answer choices. Test questions come from the Iowa Commercial Driver License Manual. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Pre-Trip Vehicle Inspection Test, Basic Vehicle Control Skills Test and On-Road Driving.. Endorsements that may be used with a Class B CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.
You have made error so far
Passing grade —
10 or fewer errors
advertising
1.
When traction is poor, a driver should accelerate especially slowly:
Because it is always good to accelerate slowly.
To keep from losing control of the vehicle.
To keep from accelerating faster than the vehicle ahead.
2.
What is Gross Combination Weight?
The total weight of the powered unit, trailer, and cargo
The total weight of a single vehicle without its load
The maximum weight allowed by the manufacturer
3.
Which of the following is not part of a vehicle’s air brake system?
Air gauges
Low pressure warning device
Air filter
4.
Do not base your decision to shift gears on:
The speed of your engine (rpm).
The speed of the road (mph).
The actions of the vehicle next to you.
5.
When traveling long distances, you should:
Take rest breaks.
Drive as fast as possible.
Drive through the night.
6.
During the driving test, the examiner will be scoring you on:
Attitude.
How quickly you arrive to your destination.
Your general driving behavior.
7.
How can you check hydraulic brakes?
Pump the brake pedal three times then apply firm pressure to the pedal for five seconds. The brake pedal should not move.
Pump the brake pedal three times then apply firm pressure to the pedal for five seconds. The brake pedal should move slowly toward the floor.
Pump the brake pedal three times then apply firm pressure to the pedal for five seconds. The brake pedal should slowly rise.
Ace Your DMV Written Test
Get your Cheat Sheet Now!

Wait, before you go

Ace your DMV Written Test with our Guaranteed Cheat Sheet.

  • Cheat Sheets Save Time
  • Cheat Sheets pass on your first try