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Vibration Standards & Safety Flashcards

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  1. Under ISO 10816-3 / ISO 20816-3, which evaluation zone describes vibration considered acceptable for unrestricted long-term operation?

    Answer: Zone B

    Zone B covers machines considered acceptable for unrestricted long-term operation, while Zone A is typical of newly commissioned machines.

  2. A machine's vibration is in Zone C of ISO 10816-3. What does that classification generally mean?

    Answer: Operation is unsatisfactory for long-term continuous use but may continue for a limited period until remedial action

    Zone C indicates the machine can run for a limited time but should be scheduled for corrective action.

  3. ISO 10816-3 recommends that the ALARM limit for a machine should normally NOT exceed approximately what value?

    Answer: 1.25 times the upper limit of Zone B

    The standard suggests alarm settings around baseline plus 25% of the Zone B upper limit, generally not exceeding 1.25 times the B/C boundary.

  4. Which measurement quantity and frequency range does ISO 10816-3 use for evaluating broadband casing vibration on most industrial machines?

    Answer: RMS velocity, typically 10 Hz to 1,000 Hz

    ISO 10816-3 evaluates broadband RMS velocity, usually over 10-1,000 Hz (2-1,000 Hz for slower machines).

  5. In ISO 10816-3, machines are separated into Group 1 and Group 2 mainly according to what characteristic?

    Answer: Rated power or shaft height

    Group 1 covers large machines (above 300 kW or shaft height of 315 mm or more) and Group 2 covers medium machines (15-300 kW).

  6. Before attaching a magnetic-base accelerometer to a running pump coupling guard area, what is the most important safety action?

    Answer: Keep cables routed away from rotating components and never reach past guards

    Cables and hands must stay clear of rotating parts, and guards must remain in place during live data collection.

  7. Which OSHA regulation governs lockout/tagout (control of hazardous energy) when servicing machinery in the US?

    Answer: 29 CFR 1910.147

    29 CFR 1910.147 is OSHA's standard for the control of hazardous energy (lockout/tagout).

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