31. Hot gases from a furnace are entering at the base of a 30m high tubular vertical chimney at 600°C. The density of air and furnace gases at respective temperatures are 1.165 and 0.405 kgm-3 respectively. The static draft produced by the chimney is . . . . . . . . Pa.
32. Refractories are materials which
33. The fusion temperature of Chromite brick is
34. Which of the following is /are neutral refractories
35. Pick up correct statement about Bessemer converter
36. Fixed carbon in coal is defined as
37. Arrange the following refractory materials in ascending order of their melting points.
P. Alumina
Q. Silica
R. Carbon
S. Zirconia
P. Alumina
Q. Silica
R. Carbon
S. Zirconia