Question

Consider the following statements with reference to testing of cotton fibre in HVI: P. Strength is measured in single fibre form
Q. Strength is measured in fibre bundle form
R. Fineness is measured by air flow method
S. Fineness is determined by measuring fibre diameter The combination of TRUE statements is:

• A. P and Q
• B. Q and R
• C. R and S
• D. P and R

Hint:

In HVI testing, strength is measured using fibre bundles, and fineness is typically measured using the air flow method, not directly by fibre diameter.

Answer 1

The Correct Option is B

To determine the correct combination of TRUE statements, we need to evaluate each of the given statements: Step 1: Evaluate Statement P.
P states that "Strength is measured in single fibre form." This is false. In HVI testing, strength is typically measured using a fibre bundle, not a single fibre. Step 2: Evaluate Statement Q.
Q states that "Strength is measured in fibre bundle form." This is true. The strength of cotton fibres is indeed measured in bundles using the HVI test, as it is more reliable than measuring individual fibres. Step 3: Evaluate Statement R.
R states that "Fineness is measured by air flow method." This is true. In HVI testing, the air flow method is commonly used to measure the fineness of the cotton fibres. Step 4: Evaluate Statement S.
S states that "Fineness is determined by measuring fibre diameter." This is false. Fineness is not directly measured by fibre diameter; instead, it is measured using methods like air flow, as stated in Statement R. Step 5: Conclusion.
The true statements are Q and R. Therefore, the correct answer is (B) Q and R.