Which type of frequency measuring instrument has multiple reeds of different natural frequency to measure vibrations?
A. Fullarton tachometer
B. Frahm Tachometer
C. Both a and b
D. None of the above
Answer:B
Which type of frequency measuring instrument has multiple reeds of different natural frequency to measure vibrations?
A. Fullarton tachometer B. Frahm Tachometer C. Both a and b D. None of the above