Question

Identify the correct statement for the screw threads
A. A square thread of nominal diameter =30 mm and pitch =6 mm is designated as K 30 x 6.
B. Knuckle threads are used on necks of glass bottles.
C. Square threads offers less frictional resistance.
D. The angle between flacks of metric threads is 55⁰
E. The flacks of B.S.W. thread are equally rounded at both crest and root.
Choose the correct answer from the options given below:

• A. A, B, and C only
• B. B, C, and D only
• C. C, D, and E only
• D. B, C, and E only

Answer 1

The Correct Option is D

The correct option is (D): B, C, and E only