Measurement of Atmospheric Moisture

Wet & Dry Bulb Hygrometer

• This is an instrument equipped with two thermometers, side by side.
• The bulb of one of the thermometers is covered with a muslin wick dipping into water.
• The water is absorbed up the muslin and evaporates, cooling.
• The difference between the wet and dry bulb temperatures is called the wet bulb depression.
• If the air is fully saturated (100% relative humidity) the water cannot evaporate, so both the wet and dry bulb temperatures are the same.

                                                            

Hair Hygrometer

• These devices use a human or animal hair under tension.
• The hair is hygroscopic (tending toward retaining moisture); its length changes with humidity, and the length change may be magnified by a mechanism and indicated on a dial or scale.

• The traditional folk art device known as a weather house works on this principle. Whale bone and other materials may be used in place of hair.
• This instrument uses strands of human or horse hair with the oils removed attached to levers that magnify a small change in hair length.

Natural Fiber MCQ Question

This quiz contains multiple choice question related to Natural fiber. Each question is on 1 mark each and no negative marking and its free of cost so, practice and check your knowledge 👍. (click on read more below)

To prepare comb sorter diagram

By using comb diagram determine the following:-
1. Mean length
2. Effective length
3. Short fiber percentage
4. Dispersion percentage 

Fiber diagram

Operating Device :- Comb sorter

Material Used :- Cotton

Introduction  :- Comb sorter is the device in which we can place the fiber tuft which is selected from different or same type of fiber and also these fiber are oriented thorough comber and after this we can obtained the actual length and graph between different fiber length.