JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech II TEXTILE TESTING - I Previous Question Paper (April/May - 2023 - R18)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
Define: Population, Sample, Random Sample.
Answer
Population is the entire group of items or individuals about which information is desired. A Sample is a subset of the population selected for investigation. A Random Sample is a sample selected in such a way that every individual in the population has an equal chance of being included.
Calculate the sample size at 95 % Confidence interval if CV is 3.67% and error is 2 %.
Answer
The formula for sample size n is:
For a 95% confidence interval, t = 1.96. Given CV = 3.67% and E = 2%:
Rounding up, the required sample size is 13.
Mark the Sigmoid relation between RH and Regain.
Answer
Sign in to view the complete answer paper.
How the Regain is useful in ascertaining the correct value of count?
Answer
Sign in to view the complete answer paper.
Classify the instruments based on Weight Distribution in Fibre length measurement.
Answer
Sign in to view the complete answer paper.
A student records micronaire values of cotton as: 4.85, 2.75, 3.87. How do you draw the inference?
Answer
Sign in to view the complete answer paper.
How “CRL” and “CRE” tensile instruments differ?
Answer
Sign in to view the complete answer paper.
What is “CCSP”? How it is calculated?
Answer
Sign in to view the complete answer paper.
Examine the relation between Yarn count and Yarn twist.
Answer
Sign in to view the complete answer paper.
A student records twist as: 13 tpi for double yarn, 34 tpi for single yarn and 70 tpi for 18 D Silk yarn. How do you draw the conclusions?
Answer
Sign in to view the complete answer paper.
Part B
You are given a role of fabric length of 200 meters. Explain how do you proceed to select the samples for Fabric testing. Give a detailed answer.
Answer
Sign in to view the complete answer paper.
Explain with merits and demerits the sampling methods of Cotton.
Answer
Sign in to view the complete answer paper.
Starting from bale of cotton, explain the laboratory procedure to measure the Moisture Regain with necessary tabular recording.
Answer
Sign in to view the complete answer paper.
Give an account of working of: Hair hygrometer, Wet and Dry bulb hygrometer.
Answer
Sign in to view the complete answer paper.
How do you identify the “Matured”, “Half matured” and “Dead” fibres under microscope? Explain the Laboratory method of measuring the Fibre maturity.
Answer
Sign in to view the complete answer paper.
Compare the performance of Fineness measuring instruments on quality grounds.
Answer
Sign in to view the complete answer paper.
You are given 200 grams of Cotton fibre. Explain how do you proceed to measure the Lint content, Trash content and invisible loss using Shirley Analyser.
Answer
Sign in to view the complete answer paper.
You are given 200 grams of two types of cotton fibres A and B. Explain how do you measure the fibre strength using Stelometer. Give the recording of observations.
Answer
Sign in to view the complete answer paper.
Why the industry does not prefer the Beesley’s balance of yarn count? Given 100 ring cops, describe the experimental set up to measure the yarn count by “WRAP REEL” method.
Answer
Sign in to view the complete answer paper.
Explain the laboratory method of measuring twist of a double yarn in laboratory.
Answer
Sign in to view the complete answer paper.