Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by Preheating the combustion air Preheating the fuel gas All of these Oxygen enrichment of combustion air TRUE ANSWER : ? YOUR ANSWER : ?
Calcination of limestone to produce lime is done in a __________ kiln. Rotary Tunnel Vertical shaft Both B and C TRUE ANSWER : ? YOUR ANSWER : ?
Ceramic recuperators compared to metallic recuperators for the same duty Are less costly Occupy more space Are lighter Have higher pressure differential between flue gas & air side TRUE ANSWER : ? YOUR ANSWER : ?
__________ is an indirectly heated furnace. Muffle furnace Soaking pit Open hearth furnace Reheating furnace TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is not an additive for flue gases from furnace to reduce its dew-point? Alkaline powders Ammonia None of these Fine dolomite TRUE ANSWER : ? YOUR ANSWER : ?
Heat transfer rate to the charge/stock in a furnace does not depend upon the Emissivity of refractory walls Flue gas temperature Initial temperature of the charged stock Type of fuels viz solid, liquid or gaseous TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is a heat treatment furnace? Muffle furnace Rotary kiln Annealing furnace Reheating furnace TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is a periodic furnace? Soaking pit Reheating furnace Rotary kiln Tunnel kiln TRUE ANSWER : ? YOUR ANSWER : ?
Thickness of stock does not affect the fuel economy of furnaces, if the material to be heated is of High thermal conductivity Both A and B Low emissivity Neither A nor B TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is a batch furnace? Cupola Reheating furnace Glass tank furnace None of these TRUE ANSWER : ? YOUR ANSWER : ?