A. kcal/m3 combustion space
C. None of these
D. kcal/hr
B. Inert
C. Decarburising
D. Oxidising
A. Computation of flue gas analysis
D. Calculation of flue gas temperature
A. 99
B. 50
D. 65
A. Soaking pit
B. L.D. converter
D. Glass melting tank
A. Electricity
B. Blast furnace gas/mixed gas
C. Coke oven gas
A. 6000
C. 2000
D. 3000
A. Shaft furnace
B. Rotary hearth furnace
D. Muffle furnace
B. All A., B. and C.
C. Quantity & temperature of waste gas
D. Corrosive nature of the waste gas
A. Open hearth furnace
B. None of these
D. Coke ovens
B. Attacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at
C. Accelerating the rate of scaling
D. Causing metal embrittlement
E. h temperature
A. Store smaller quantity of waste heat
C. All A., B. & C.
D. Are lighter & compact
A. Protect the charge from the effects of the products of combustion
B. Smooth out temperature inequalities on the combustion side of the muffle wall
D. Neither A. nor B.
A. Sheets
B. Slabs
D. Coils
A. Calcining
C. Smelting
D. Roasting
A. Less of excess air
B. More of CO2 in flue gas
D. More of CO in flue gas
A. None of these
B. Sintering furnace
C. High pressure boiler
B. Location of outlet ports and heating & combustion devices
C. Fans
D. Arrangement of heating stock in the furnaces
A. Coke ovens
B. Open hearth furnace
A. Reheating furnace
D. Soaking pit
A. Gas velocity in furnace
B. Size of the furnace
D. Ratio of wall surface to surface of stock
A. Is favoured by CO2
B. Is the removal of carbon from iron carbide (Fe3C)
D. Affects its crystalline structure
A. Flue gas volume
B. Fuel consumption
C. Stack loss
A. Increases the load on the induced draft fan
C. Reduces the furnace draught
D. Reduces the flue gas temperature and makes the furnace atmosphere oxidising
C. Combination of induced current and skin effect
D. Current flow through a heating element
C. Reheating furnace
D. Glass tank furnace
A. Excessive fly ash discharge from the stack
B. Higher power consumption in its transportation
C. Erosion of induced draft fan blades
B. Temperature control
C. Measurement of flue gas volume
D. Pressure adjustment
A. Surface area & emissivity of the stock
B. Properties of the muffle wall (temperature, area, and emissivity)
B. Steel sheets
C. Ingots
D. Steel coils
A. Calcination of limestone & dolomite
B. Cement manufacture
A. Burner design (thoroughness of mixing versus stratification)
B. nge of direction)
C. Air supplied and furnace temperature
D. Air preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by
A. Have higher pressure differential between flue gas & air side
B. Are lighter
C. Are less costly
A. Waste heat boiler
B. Ceramic recuperator
C. Economiser
A. Supply of excess fuel
B. Supply of excess air
D. e air</strong>
A. Blast furnace gas with oxygen
C. Furnace oil with oxygen
D. Furnace oil with air
A. Shaft
B. Tunnel
C. Rotary hearth
A. Preheating the fuel gas
B. Preheating the combustion air
C. Oxygen enrichment of combustion air
A. Refractory bricks
B. Stainless steel
D. Potteries
A. Pulverised coal
B. Coke oven gas
C. Furnace oil
A. Physical nature, ash content and fineness of the coal
B. Amount of excess air supplied and load on the boiler
D. Type of burner and combustion chamber
A. 5% H2 + 9% N2
C. 100% H2
D. 100% CO
A. Steel melting
C. Annealing steel coil
D. Heating air
A. Low emissivity
B. High thermal conductivity
A. Tunnel kiln
B. Reheating furnace
C. Rotary kiln
A. Weight heated/hr
C. Weight heated/furnace volume
D. None of these
B. Butterfly
D. Globe
B. Are of smaller size
C. All A., B. and C.
D. Are less costly
A. Preheating of combustion air
C. Preheating of cold stock
D. Steam generation in waste heat boilers
A. Solid fuels
B. Hydrocarbon containing fuel gases (e.g. coke oven gas, refinery gas etc.)
Showing 1 to 50 of 140 mcqs
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