2026 Iowa DMV Knowledge Test Class B Test 1 (50 Questions And Complete Answers)
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Do not base your decision to shift gears on:
1. The speed of your engine (rpm).
2. The speed of the road (mph).
3. The actions of the vehicle next to you.
1. The speed of your engine (rpm).
2. The speed of the road (mph).
3. The actions of the vehicle next to you.
The actions of the vehicle next to you.
When traction is poor, a driver should accelerate especially slowly:
1. Because it is always good to accelerate slowly.
2. To keep from losing control of the vehicle.
3. To keep from accelerating faster than the vehicle ahead.
1. Because it is always good to accelerate slowly.
2. To keep from losing control of the vehicle.
3. To keep from accelerating faster than the vehicle ahead.
To keep from losing control of the vehicle.
What is Gross Combination Weight?
1. The total weight of the powered unit, trailer, and cargo
2. The total weight of a single vehicle without its load
3. The maximum weight allowed by the manufacturer
1. The total weight of the powered unit, trailer, and cargo
2. The total weight of a single vehicle without its load
3. The maximum weight allowed by the manufacturer
The total weight of the powered unit, trailer, and cargo
How can you check hydraulic brakes?
1. Pump the brake pedal three times then apply firm pressure to the pedal for five seconds. The brake pedal should not move.
2. 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.
3. Pump the brake pedal three times then apply firm pressure to the pedal for five seconds. The brake pedal should slowly rise.
1. Pump the brake pedal three times then apply firm pressure to the pedal for five seconds. The brake pedal should not move.
2. 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.
3. Pump the brake pedal three times then apply firm pressure to the pedal for five seconds. The brake pedal should slowly rise.
Pump the brake pedal three times then apply firm pressure to the pedal for five seconds. The brake pedal should not move.
When traveling long distances, you should:
1. Take rest breaks.
2. Drive as fast as possible.
3. Drive through the night.
1. Take rest breaks.
2. Drive as fast as possible.
3. Drive through the night.
Take rest breaks.
Which of the following is not part of a vehicle’s air brake system?
1. Air gauges
2. Low pressure warning device
3. Air filter
1. Air gauges
2. Low pressure warning device
3. Air filter
Air filter
During the driving test, the examiner will be scoring you on:
1. Attitude.
2. How quickly you arrive to your destination.
3. Your general driving behavior.
1. Attitude.
2. How quickly you arrive to your destination.
3. Your general driving behavior.
Your general driving behavior.
Blocking cargo:
1. Should never be done.
2. Should only be done in poor weather.
3. Prevents cargo from moving.
1. Should never be done.
2. Should only be done in poor weather.
3. Prevents cargo from moving.
Prevents cargo from moving.
If you plan to transport hazardous materials, you must pass which endorsement test?
1. Tank
2. Hazardous materials
3. Passengers
1. Tank
2. Hazardous materials
3. Passengers
Hazardous materials
Driving at night is usually:
1. More difficult than driving during the day.
2. Simpler than driving during the day.
3. Discouraged.
1. More difficult than driving during the day.
2. Simpler than driving during the day.
3. Discouraged.
More difficult than driving during the day.
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