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Measurements and Instrumentation - Engineering

Q1:

For use at 50 Hz the range of scale of vibrating reed frequency meter is

A 25 - 75 Hz

B 40 - 60 Hz

C 47 - 53 Hz

D 42 - 58 Hz

ANS:C - 47 - 53 Hz

Generally the frequency does not fall below 47 Hz and does not exceed 53 Hz.