Test: Fibre to Fabric - Class 6 MCQ

 Figures X and Y represent takli and charkha respectively. Both takli and charkha are used for spinning i.e., process of twisting fibres to make yam.

In the given flow chart, P could be animal fibre like wool or silk. Q could be jute, flax or hemp. R could be sisal and S could be cotton. Wool is used in winter clothing while cotton is used for summer clothing. Plant stem fibres like jute, flax, hemp are generally used for making bags, ropes, carpets, etc. Sisal which is a leaf fibre is also used for almost same Dumoses.

To identify the steps involved in the processing of cotton from the given options, we will analyze each step:

1. Ginning: This is the first step in processing cotton. Ginning involves separating the cotton fibers from the cotton seeds. This step is essential for obtaining the raw cotton fibers that will be used in further processing.

2. Spinning: After ginning, the next step is spinning. Spinning is the process of twisting the cotton fibers together to make yarn. This yarn can then be used to create fabric.

3. Weaving: Once we have the yarn from the spinning process, the next step is weaving. Weaving involves interlacing two sets of yarn (the warp and the weft) to create fabric.

4. Scouring: This step involves cleaning the fabric to remove impurities, but it is not specifically a step in the processing of cotton fibers. It is more relevant in the context of preparing fabric for dyeing or finishing.

5. Retting: This is a process used primarily for processing fibers like jute or flax, not cotton. It involves soaking the plant material to separate the fibers from the stalk.

Based on this analysis, the correct steps involved in processing cotton are:

- Ginning
- Spinning
- Weaving

Thus, the correct option that identifies the steps involved in processing cotton is Ginning, Spinning, and Weaving.

According to the given dichotomous key, P is a synthetic fibre like polyester, Q could be jute, flax, etc. R is cotton, S is silk and T is wool.

All the characteristics are present in cotton fibre. Cotton is neutral in static charge, it does not readily give or attract electrons when brought in contact or rubbed with skin. Thus, cotton can be worn close to the skin and provides comfort. Cotton fibre contains 80-90%of cellulose and each fibre is made up of approximately 20-30 layers of coiled cellulose springs. Cotton has very good moisture-absorbing quality, that's why cotton clothes are preferred in summers. Cotton fibre has a natural twist. This property provides it with an uneven surface, which increases inter-fibre friction and enables fine cotton yarns of adequate strength to be spun.