VIBRATION

The definition of acceleration is

• The number of times that vibrating object generates a repetitive motion in 1 second

• The changing rate of displacement to time

• The changing rate of velocity to time

• The amplitude (distance) between the peaks of vibration

What is the TLV of hand arm vibration FOR duration exposure less than 1 hour based on ACGIH?

• 12 m/s2

• 13 m/s2

• 14 m/s2

The following precautions help to reduce whole-body vibration exposure, except:

• Limit the time spent by workers on a vibrating surface.

• Mechanically isolate the vibrating source or surface to reduce exposure.

• Ensure that equipment is unwell maintained to avoid excessive vibration.

• Install vibration damping seats.

Acceleration is often used as a measure of vibration exposure for the following reasons:

• Measuring acceleration can also give information about frequency and amplitude of vibration

• The degree of harm is unrelated to the magnitude of acceleration.

• Several types of instruments are available for measuring acceleration, the rate of change of velocity in speed or direction per unit time (e.g., per second).

All of the following are early symptoms of vibration syndrome except

• Tingling

• sweating hands

• Shaking hands

• Numbness