Chemical Engineering Basics - Study Mode
[#141] A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness __________ metre.
Correct Answer
(B) 0.1
[#142] Large scale fire on fuel gas line is normally extinguished by
Correct Answer
(D) Nitrogen
[#143] Theoretical volume of oxygen required for complete combustion of 1 Nm 3 of acetylene, in oxy-acetylene welding is __________ Nm 3 .
Correct Answer
(D) 2.5
[#144] Annealing of a material does not
Correct Answer
(C) Case harden it
[#145] Multistage compression is necessary for high efficiency,
Correct Answer
(A) If the ratio of the delivery pressure to the intake pressure exceeds 5:1