Discussion
State whether the following is true or false.
Silica brick expands on first heating unless it has been fully converted during manufacture.
Answer: C
Correct answer: True
Unconverted quartz expands sharply as it inverts and then as it converts to the higher forms, so a partly converted brick grows in the furnace wall and can spall or push the structure out of shape. That is why the conversion is done deliberately and completely in the works, and why the permanent linear change on reheating is a specification test for silica refractories.
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