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Which of the following material is not used in the boiler furnace walls?

Which of the following material is not used in the boiler furnace walls? Correct Answer Concrete

Fire clay, Silica and Kaolin have property of resisting change in shape, weight or physical property at higher temperature. Concrete have no such properties at higher temperature so it is not suitable for that. The construction of boiler furnace varies from plain refractory walls to completely water cooled walls depending upon the characteristics of fuel used and firing methods.

Related Questions

Ratio of chemical A and B in boiler Y is 3 : 2 and Boiler X has ratio of chemical A to chemical B as 1 : 7, 16 litres of mixture is removed transferred from boiler X to boiler Y. What is the total capacity of boiler Y if capacity of boiler X is 144 litres and difference between chemical A and B in boiler Y after transfer is 25 litres? Assume that after transferring 16 litres from boiler X, boiler Y is running at full capacity
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A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.
A boiler accessory that is used to put off the fire in the furnace of the boiler when the water level in the boiler falls below a safe level and prevent overheating of tubes
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Water (CP = 4 kJ/kg K) is fed to a boiler at 30°C, the enthalpy of vaporization at atmospheric pressure in the boiler is 2400 kJ/kg; the steam coming from the boiler is 0.9 dry. What is the net heat supplied in the boiler?
The predominant mode of heat transfer which takes place from boiler furnace to water walls of a boiler is
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(1) A Sells to B a boiler for the purpose of manufacturing carbon paper. The boiler does not satisfy the requirement of Indian Boiler's Act. B is entitled to recover damages.
(2) A contracts to make and deliver a set of false teeth to B. The false teeth do not fit in the mouth of B. B is entitled to reject the goods.
Of the above:
A device used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit, is called