Four strain gauges, with specification given below, are available to measure the torque on a cylindrical shaft 4 cm in diameter connecting a motor and load. (a) Draw clearly labelled….
What is the rate of mass loss per unit length of the cylinder?
A. Dry air at atmospheric pressure blows over an insulated fl at plate covered with a thin wicking material which has been soaked in ethyl alcohol. The temperature of the plate is 25°C. Calculate the temperature of the air stream assuming that the concentration of alcohol is negligible in the free stream. Also calculate the mass transfer rate of alcohol for a 30 cm2 plate if the free stream velocity is 7 m/s.
B. Helium gas at 25°C and 4 bar is contained in a glass cylin der of 100 mm inner diameter and 5 mm thickness. What is the rate of mass loss per unit length of the cylinder?