1. The range of Maturity Ratio (M) of cotton is:
0 to 1
0 to 100
0.2 to 1.2
0.5 to 1.5
Ans: 3
2. If d is the diameter, the ratio of airflow through a fibre plug during fibre fineness measurement will be proportional to
d
d2
d4
1/d2
Ans: 2
3. If 6 slivers each having CV(%) of 6 are doubled, the CV(%) of the resultant sliver will be
√6
6
12
25
Ans: 1
4. A 36s cotton yarn with a twist multiplier of 3.5 will have
18 TPI
21 TPI
30 TPI
36 TPI
Ans: 2
We know that TPI = TM x √Count
Therefore TPI = 3.5 x √36 = 21
5. When the twist is increased in a Spun yarn, its strength
Increases
Decreases
Does not change
First increases and then decreases
Ans: 4
6. In a tensile test, if the strain rate is increased, the apparent tensile strength of a ring-spun yarn will
Increases
Decreases
Not change
Show no trend
Ans: 2
7. The standard CSP value for a combed cotton yarn is
1,850
2,000
2,250
2,800
Ans: 2
For carded = 1800 {1700-1900}
8. With an increase in the friction between the yarns, the tear strength of fabric will be
Increases
Decreases
Not change
Show no trend
Ans: 2
9. Air Permeability of fabrics is generally measured with a pressure drop across fabrics equivalent to the water head of
1mm
10mm
10cm
1m
Ans: 2
10. If T is the thermal insulation of each layer of fabric, the thermal insulation of two layers of fabric together will be
Greater than 2T
Equal to 2T
Less than 2T
Ans: 1
11. Indigosal O is suitable for wool since.
It has a good affinity for this fiber
It can be applied to an alkaline bath
It can be developed by means of acidified sodium nitrite.
Ans: 1
12. Solamine Black is
A mineral color
An Oxide
A Pigment
Ans: 2
13. Astrazon Blue GL is recommended
For dyeing acrylic fabrics with a light fastness of 7-8
For dyeing polyester
For mass coloration of polypropylene
Ans: 1
14. O-Nitrodiphenyl amine disperse dyes have better light fastness due to.
The presence of intermolecular hydrogen bonding
Resonance Stability
Strong dye fiber interaction
Ans: 2
Fill in the blanks:
The density of polypropylene in 0.91 g/cc and that of viscose is 1.52-1.49 g/cc
Friacetatic fibers are soluble in Glacial Acetic Acid and Methylene Chloride at room temperature.
Sisal is an example of a leaf fibre wile cotton is a seed fiber.
The protein in wo ol is known as Keratin while that in silk as fibroin.
The initial modulus of PET is generally Lower than Viscose while the elongation at break is higher than viscose.
At standard conditions the moisture regain values of acetate and acrylic fibers are 1.32 and 1.16 respectively.
The term degumming is associated with Silk fibre while retting with Jute fibers.
MEG and TPA are the monomers for PET
The end group is PET are COOH, OH while in ny lon are COOH, NH2
The glass transition temperature of nylon G is 50oc in dry static and 29o in water
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