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Question 1 of 50
1. Question
1. During the walk-around inspection of a CMV, what wheel or rim condition would require immediate correction before the vehicle can be safely operated?
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Question 2 of 50
2. Question
2. When inspecting the suspension system during a pre-trip inspection, which condition of the spring hangers would indicate an out-of-service condition requiring immediate correction?
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Question 3 of 50
3. Question
3. During a pre-trip inspection, the driver checks the U-bolts on the suspension system. Which U-bolt condition would require immediate correction before the vehicle can be operated?
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Question 4 of 50
4. Question
4. During the cab check portion of a pre-trip inspection, the driver verifies the fire extinguisher. What is the requirement for the fire extinguisher to be considered properly maintained and ready for use?
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Question 5 of 50
5. Question
5. When checking spare electrical fuses during the cab inspection, what is the regulatory requirement for the quantity of spare fuses a CMV must carry?
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Question 6 of 50
6. Question
6. During the cab check portion of a pre-trip inspection, what must the driver verify about the horn to ensure the vehicle meets safety requirements?
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Question 7 of 50
7. Question
7. During a pre-trip inspection, the driver verifies that three reflective emergency triangles are present in the cab. When must these triangles be placed around the vehicle, and what is the correct placement pattern on a two-lane road?
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Question 8 of 50
8. Question
8. A driver is performing a pre-trip inspection and discovers that two of the three required reflective triangles are present in the cab, but one triangle is missing. Later during the trip, the vehicle experiences a mechanical breakdown on a divided highway (four lanes, two directions). Which statement correctly describes the regulatory compliance and safety implications?
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Question 9 of 50
9. Question
9. A CDL driver performs a pre-trip inspection on a Class A tractor-semitrailer and finds the following conditions: one wheel rim on the drive axle has a visible crack approximately 1 inch long, two U-bolts on the trailer axle appear loose (can be moved by hand), and the fire extinguisher gauge shows it is in the “discharged” zone. Which analysis correctly identifies the vehicle’s operational status?
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Question 10 of 50
10. Question
10. During the cab check portion of a pre-trip inspection, which of the following is NOT a required verification for emergency equipment compliance?
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Ready for more practice? This practice test continues your preparation with additional questions covering engine compartment and cab inspection procedures. Each question is designed to mirror the difficulty and format of the actual CDL written test.
What This Practice Test Covers
This practice test focuses on:
- engine compartment and cab inspection procedures
- Real-world CDL scenarios
- Questions formatted like the actual DMV test
- Detailed explanations for each answer
Each question helps you build the knowledge and confidence needed for test day. Practice makes perfect — take as many attempts as you need.