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Iowa CDL Permit Test - Class B

(From the 2019 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
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1.
When driving, knowing what is happening behind you is:
Rarely important.
Important.
Distracting.
2.
When backing a truck, you should:
Only use the side mirrors on the driver’s side.
Use both side mirrors.
Only use the side mirrors on the passenger's side.
3.
Which of the following is not a sign of fatigue?
Difficulty focusing, with frequent blinking
Yawning repeatedly or rubbing eyes
Staying in your lane
4.
Watching the road ahead of you:
Allows you time to make a plan to avoid an upcoming hazard.
Is not encouraged as it distracts you from driving.
Is only important when traveling in congested traffic.
5.
When you need to change lanes:
Other vehicles will likely get out of your way.
You should change lanes slowly and smoothly.
You should wait to change lanes until you are in an intersection.
6.
Which of the following is acceptable if found during a pre-trip inspection?
Mismatched tire sizes
Tread of 3/32 of an inch in the grooves of the front tires
Tires manufactured by different makers
7.
Rims with welding repairs:
Are not safe to be used.
Are acceptable on combination vehicles.
Are acceptable only when traveling at speeds under 40 mph.
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