A. Insulating refractories used in place of regular refractory bricks are usually called light weight refractories, and they have similar composition as heavy bricks.
B. Graphite refractories are also called plumbago refractories.
C. Superduty fireclay bricks correspond to a pyrometric cone equivalent of 26-28.
D. Calcined magnesite is also called dead burnt magnesite.
Correct Answer
Superduty fireclay bricks correspond to a pyrometric cone equivalent of 26-28.
More questions
1. Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is
Options
A. more
B. less
C. same
D. cither (a) or (b); depends upon the I.D. of the pipe