Question

To measure the angle of twist, which of the following device is used in the Bevis-Gibson Flash Light Torsion Dynamometer?

(a) Torsion meter

(b) Prony brake dynamometer

(c) Rope brake dynamometer

(d) Belt transmission dynamometer

I had been asked this question in an interview for internship.

Query is from Bevis Gibson Flash Light Torsion Dynamometer in chapter Brakes and Dynamometers of Machine Dynamics

Answer 1

Correct answer is (b) Prony brake dynamometer

Easiest explanation: Torsion meter is the device used in Bevis-Gibson Flash Light Torsion Dynamometer to measure the angle of twist in the shaft. This helps in calculating the lag of the disc which in turn is essential for making the light visible at the eyepiece.