Related Questions

Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of
A Graphite powder
B Thoria
C Zircon powder
D Beryllium
An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture?
A Cork
B Saw dust
C Sand
D Chemically prepared foam
Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory
A Mortars
B Cements
C Castables
D None of these
If a refractory contains high content of silicon, it means refractory is
A Acidic
B Basic
C Neutral
D Brittle
A ladder is resting against a vertical wall and its bottom is 2.5 m away from the wall. If it slips 0.8 m down the wall, then its bottom will move away from the wall by 1.4 m. What is the length of the ladder?
A 6.2 m
B 6.5 m
C 6.8 m
D \7.5 m
Which furnace consumes maximum refractory annually in an integrated steel plant?
A Soaking pit
B Blastfurnace
C L.D. converter
D Coke ovens
The refractory lining of the bottom in a basic electric arc furnace is made of
A Silica
B Alumina
C Magnesia
D Fireclay
Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by
A Conduction
B Convection
C Both A & B
D Radiation
A refractory wall separating the stock and the source of heat is provided in a
A Updraft kiln
B Muffle furnace
C Continuous furnace
D None of these
The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is
A d > m > e
B d > e > m
C e > m > d
D e > d > m

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