Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above __________ °C, because corrosion prevails at higher temperatures. 1050 1250 750 350 TRUE ANSWER : ? YOUR ANSWER : ?
Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the Amount of excess air supplied and load on the boiler Type of burner and combustion chamber All of these Physical nature, ash content and fineness of the coal TRUE ANSWER : ? YOUR ANSWER : ?
Tunnel kilns are usually used for Melting of glass Drying/tempering of refractories Roasting of pyrites Reheating of slabs TRUE ANSWER : ? YOUR ANSWER : ?
Reverberatory furnace is used for Roasting/reduction of ores Annealing steel coil Heating air Steel melting TRUE ANSWER : ? YOUR ANSWER : ?
Which furnace employs preheating, heating and soaking zones? Cupola Open hearth furnace Reheating furnace Soaking pit TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is the most suitable for preheating combustion air above 650°C ? Regenerator None of these Metallic recuperator Ceramic recuperator TRUE ANSWER : ? YOUR ANSWER : ?
Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an Annealing furnace Blast furnace Steam boiler Salt bath furnace TRUE ANSWER : ? YOUR ANSWER : ?
Calcination of limestone to produce lime is done in a __________ kiln. Tunnel Both B and C Vertical shaft Rotary TRUE ANSWER : ? YOUR ANSWER : ?
Pot furnace which is either regenerative or recupterative, is used in the manufacture of Glass Refractory bricks Potteries Stainless steel TRUE ANSWER : ? YOUR ANSWER : ?
Combustion of fuel in a furnace with oxygen enriched air results in higher Flame temperature Stack loss Fuel consumption Flue gas volume TRUE ANSWER : ? YOUR ANSWER : ?