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Measurements and Instrumentation - Engineering

Q1:

With a variable reluctance tachometer having 60 rotor teeth the count reads 3600 counts per minute. The speed in RPM is

A 36

B 60

C 360

D 3600

ANS:B - 60

If speed is 60, the counter will count 60 x 60 = 3600 counts/per minute.