Long-answer type questions : 1. Describe the processing of fibres into wool in detail. 2. Describe with a labelled diagram the life history of a silk moth. 3. Describe in details the production of silk. 4. Enumerate a few health hazards associated with sericulture and the wool industry.
Answers
Explanation:
1:-The steps involved for processing fibres into wool are shearing, scouring from sheep, sorting, dyeing, straightening, rolling and combing. ... In the next step, that is, scouring, the hair that was sheared is washed in tanks to remove dirt, dust and grease by machines.
2:- The life history of a silk moth starts when a female silk moth lays eggs. The larvae or caterpillars hatched from the eggs of the silk moth. Thesesilkworms feed on fresh mulberry leaves the silkworm grows in size and then becomes a pupa. In the pupa stage, it weaves a net to hold itself.
3:- The process of silk production is known as sericulture. ... Extracting raw silk starts by cultivating the silkworms on mulberry leaves. Once the worms start pupating in their cocoons, these are dissolved in boiling water in order for individual long fibres to be extracted and fed into the spinning reel.
4:- Some of the health hazards faced by wool industry workers are: 1. Respiratory diseases like asthma, bronchitis etc., are very common among these workers. ... Other health problems include headache, fever, back pain, neck pain etc.