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To resist spalling tendency, a refractory should have
Spalling of a refractory means its
Output of a bulldozer is (i) Increased if drawbar HP of the tractor is increased for a given hauling distance (ii) Decreased if drawbar HP of the tractor is increased for a given hauling distance (iii) Increased if the hauling distance is increased for a given drawbar HP of the tractor (iv) Decreased if the hauling distance is increased for a given drawbar HP of the tractor
Output of a bulldozer is
(i) Increased if drawbar HP of the tractor is increased for a given hauling distance
(ii) Decreased if drawbar HP of the tractor is increased for a given hauling distance
(iii) Increased if the hauling distance is increased for a given drawbar HP of the tractor
(iv) Decreased if the hauling distance is increased for a given drawbar HP of the tractor
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.
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?
Refractory timber catches fire readily while non-refractory timber does not catch fire readily.
Silliminite (Al2O3.SiO2) refractory, which is a neutral refractory, is not used in
Given below are the statements about the difference between passive resistance and satyagraha. Which ones are true?  (A) Passive resistance is weapon of the weaker sections, satyagraha never desires to terrorise the opponent (B) Passive Resistance is negative in practice, whereas satyagraha is positive morality (C) Passive Resistance is equivalent to satyagraha (D) Passive Resistance is not afraid of the physical strength while satyagraha is afraid of physical strength Choose the correct answer from the options given below:
Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory