Question

Who invented the sling psychrometrer?

(a) Sir John Leslie

(b) Leonardo da Vinci

(c) George Babcock

(d) George Brayton

I had been asked this question by my college director while I was bunking the class.

This key question is from Drying topic in section Drying of Food Processing Unit Operations

Answer 1

The correct option is (a) Sir John Leslie

For explanation I would say: Sir John Leslie invented the sling psychrometrer. A sling psychrometer is an instrument that measures the dew point and relative humidity in an area. It has two thermometers, they are a wet bulb and a dry bulb.