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General Knowledge Practice Question 34

RequiredGeneral Knowledge · Question 34

If your vehicle begins to hydroplane, you should:

• ABrake hard immediately
• BRelease the accelerator and avoid braking; hold steering steady
• CSteer sharply away
• DAccelerate to regain traction

Correct answer: B. Release the accelerator and avoid braking; hold steering steady

Why: Hydroplaning means tires are riding on water with little contact. Sudden braking or steering can cause loss of control. Release the throttle gently and let speed bleed off.

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

• Q39. When descending a long downgrade you should:
• Q52. When making a right turn at an intersection, you should:
• Q65. When parking on a level surface, you should:
• Q13. The three types of skids you must recognize are:
• Q26. Vehicles always required to stop at every railroad crossing include:

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.