1) A spring scale needs a change of 15kgf in the applied weight to generate a 2cm change in the deflection of the spring scale. Find the scale sensitivity. Write a brief notes on the variable transmission or transfer element. Propose a appropriate transducer from the following that converts in to electrical signal: a) Pressure b) Acceleration. Describe how bellows are used to measure the pressure?
2) Describe the backlash in connection with the micrometer/screw gauge. Provide four examples of end standards employed within the shop. State the method of checking the straightness of machine elements. Specify the optical property of a surface responsible interferrometric measurement of the surface. Describe what do you understand by the term waviness in connection with the surface finish measurement?
3) Provides examples of measurement along with the aid of tool maker’s microscope? Specify the 3- stages of measurement system? Describe the method of measuring torque and power transmitted by the rotating shaft. Describe it with the help of suitable diagram and provide some of examples. Following data is taken while calibrating a bourdon gauge with the dead weight gauge tester.
Actual Pressure (kgf/cm) 5 10 15 20 25 30 25 20 15 10 5
Gauge Reading (kgf/cm) 4.5 9.6 14.2 18 22.5 28 26 21 16.2 11. 4 7