Discussion
Consider the following statements about glass fibre.
1. Continuous filament is drawn through bushings from the melt.
2. Insulation wool is made by spinning or blowing the melt.
3. Both types are annealed in a lehr after forming.
Answer: C
Correct answer: 1 and 2 only
Statements 1 and 2 describe the two products correctly: continuous filament is drawn through platinum bushings and wound, while insulation wool is made by flinging or blowing the melt into short fibres. Statement 3 is wrong - fibres are so fine that they cool essentially instantly and uniformly, so no stress gradient develops and no lehr is needed. Annealing is for articles thick enough to cool unevenly.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development