Which statement about handbrake testing is correct?

• A. Handbrakes may never be tested while cars are in motion
• B. Handbrakes may be tested only when necessary for safety
• C. Handbrakes may be tested only when coupling to equipment
• D. Handbrakes may be tested at any time without restrictions

Answer: (B)

Testing the handbrake is a safety check that should happen only when there is a safety justification. You don’t perform it as a routine or casual action; you test it when verifying that the brake will hold if needed, such as after maintenance, after adjustments, or when preparing to move equipment to ensure it will stay in place. Since the handbrake’s purpose is to prevent movement, testing while cars are moving is dangerous and not appropriate. It’s not about testing only when coupling to equipment or testing without any restrictions; the test should be limited to situations where safety could be compromised and needs validation.