- (A) 15
- (B) 40
- (C) 70
- (D) 85
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- (A) Higher calorific value
- (B) Better combustion
- (C) Smokeless burning
- (D) Less erosion on furnace wall
- (A) Economiser
- (B) Steam superheater
- (C) Air preheater
- (D) All
- (A) Economiser
- (B) Regenerator
- (C) Ceramic recuperator
- (D) Waste heat boiler
- (A) The vacuum pressure is always the negative gauge pressure
- (B) The pressure of the liquid measured by a piezometer tube is the gauge pressure
- (C) Manometric liquid should have high surface tension
- (D) The point at which the resultant pressure on an immersed surface acts, is known as the centre of gravity
- (A) Increase in calorific value of the fuel
- (B) Increase in flame temperature
- (C) Reduction in scale losses
- (D) Saving in fuel consumption
- (A) Blast furnace stoves
- (B) Blast furnace
- (C) Coke oven heating chamber
- (D) Rotary kilns
- (A) Fanning friction factor is inversely proportional to Reynolds number always
- (B) The property of a randomly packed bed (with raschig rings) is given by the ratio of the total volume to the volume of voids in the bed
- (C) Mach number in an incompressible fluid is always unity
- (D) Mach number is given by the ratio of the speed of the fluid to that of sound in the fluid under conditions of flow
- (A) Size of the furnace
- (B) Gas velocity in furnace
- (C) Ratio of wall surface to surface of stock
- (D) None of these
- (A) Change in volume during a change of temperature
- (B) Difference in density between hot and cold gases
- (C) Furnace pressure in conjunction with draft in flues
- (D) All
