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General Knowledge Practice Question 62

RequiredGeneral Knowledge · Question 62

The CDL must be carried by the driver:

• AOnly when crossing state lines
• BWhenever operating a CMV
• COnly when transporting passengers or hazmat
• DOnly at scales

Correct answer: B. Whenever operating a CMV

Why: Drivers must carry their valid CDL whenever operating a commercial motor vehicle. The medical certificate may need to be carried unless on file with the licensing state.

How this question fits the General test

FMCSA requires General Knowledge competency under 49 CFR 383.111 because every CDL holder operates a heavy vehicle in mixed traffic where situational judgment, pre-trip discipline, and emergency response routinely separate a safe trip from a fatal one.

Study technique for this topic

Read the FMCSA Model CDL Manual Section 2 cover to cover, then re-read it focused on numbers — speeds, distances, weights, and pressures. Use the practice questions in this category to drill those numeric thresholds until you can answer without hesitation.

Related General practice questions

• Q10. You should check your mirrors approximately every:
• Q23. Refusing a chemical alcohol test under federal CDL rules:
• Q36. On packed snow, reduce speed by approximately:
• Q49. A driver who is not endorsed for hazmat must still:
• Q63. A driver discovering a leak from their fuel tank during a trip should:

Continue your CDL preparation

The General Knowledge portion of the CDL knowledge exam covers more than this single question. Use this site's full General Knowledge bank to drill every topic, then test yourself with one of our state-specific practice sets to confirm you are ready for the actual DMV exam in your state. Always check your state's CDL handbook for any local addenda before the test day.

If you are still building your overall CDL foundation, start with the General Knowledge bank — every CDL applicant must pass it — and then work outward to the endorsements you plan to add.