Unofficial study aid. Not affiliated with or endorsed by the U.S. DOT, the FMCSA, or the Iowa licensing agency. Rules change: always confirm with the official Iowa CDL manual. Practice does not guarantee a passing score on the official test.
1.According to the Iowa CDL manual, what must you pass to complete the pre-trip vehicle inspection and advance to the next test segment?
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Correct answer: D. The air-brake check Iowa's cover note: the air-brake check must be passed to complete the pre-trip vehicle inspection and advance to the next test segment (automatic failure if not performed correctly).
2.On Iowa's vehicle inspection test, how is the 5 mph service brake check handled?
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Correct answer: A. Verbally describe it; no physical demonstration Iowa's note on the service brake check (pull forward at 5 mph and stop): verbally describe only, no physical demonstration will be required in Iowa.
3.Per the Iowa manual's air brake check, what air loss in 1 minute is too much for a combination vehicle with the brakes applied?
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Correct answer: B. More than 4 pounds Iowa's checklist: inspect the gauge to see if pressure drops more than 3 pounds in 1 minute (single vehicle) or 4 pounds in one minute (combination vehicle).
4.Which passenger vehicle class does the Iowa manual say is not allowed in Iowa?
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Correct answer: C. Class A passenger vehicles In the M restriction description, the Iowa manual adds: 'In Iowa, no Class A passenger vehicles are allowed.'
5.According to the Iowa manual, how close to the railroad tracks must school buses, charter buses and placarded vehicles stop at passive crossings?
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Correct answer: A. Within 15 to 50 feet Iowa manual: school buses, charter buses, drivers carrying passengers for hire and all placarded hazmat vehicles must stop within 15 to 50 feet of railroad tracks before crossing.
6.In the Iowa manual's railroad crossing rules, which drivers are listed with buses and placarded vehicles as required to stop?
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Correct answer: B. Drivers carrying passengers for hire (such as Uber or Lyft) Iowa lists school buses, charter buses, drivers carrying passengers for hire (such as Uber or Lyft) and all placarded hazmat vehicles.
7.Under the Iowa manual, when do you NOT have to stop at a railroad crossing even if your vehicle is normally required to?
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Correct answer: A. When the crossing is marked with an 'Exempt' sign Iowa: if a police officer or traffic signal directs traffic to proceed you do not have to stop, nor if the crossing is marked with an 'Exempt' sign.
8.Who can use the Iowa DOT's official CDL test prep app for free?
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Correct answer: C. Anyone who has an Iowa license or ID The Iowa manual says the official CDL test prep app is free to anyone who has an Iowa license or ID.
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CDL Permit Pass Pro has thousands of practice questions in English and Spanish, with explanations and pre-trip vocabulary with audio. Coming soon to iPhone and Android.