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General Knowledge Practice Question 25

RequiredGeneral Knowledge · Question 25

When required to stop at a railroad crossing, you must stop within:

• A5 to 25 feet of the nearest rail
• B15 to 50 feet of the nearest rail
• C100 to 200 feet
• DAnywhere within sight

Correct answer: B. 15 to 50 feet of the nearest rail

Why: Vehicles required to stop at every railroad crossing must do so no closer than 15 feet and no farther than 50 feet from the nearest rail.

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

• Q15. At 55 mph, the average reaction distance is approximately:
• Q29. The aggregate working load limit of all tiedowns must equal at least:
• Q42. A yellow center line on a roadway separates:
• Q55. The hand-held microphone (CB) or cell phone use rule for CDL drivers is:
• Q3. GVWR stands for:

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.