- (A) Momentum transfer in laminar flow results from velocity gradient
- (B) A fluid in equilibrium is not free from shear stress
- (C) The viscosity of a non-Newtonian fluid is a function of temperature only
- (D) Both
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- (A) Emissivity of the refractory walls
- (B) Size of the furnace
- (C) Use of waste heat recovery equipments
- (D) Thickness of the stock
- (A) A forced vortex occurs when fluid rotates as a solid about an axis
- (B) In laminar flow, Newton’s law of viscosity does not apply
- (C) A free vortex occurs, when fluid rotates as a solid
- (D) In turbulent flow, there are neither cross-currents nor eddies
- (A) Pulverised coal
- (B) Furnace oil
- (C) Blast furnace gas/mixed gas
- (D) Coke oven gas
- (A) Roasting/reduction of ores
- (B) Annealing steel coil
- (C) Heating air
- (D) Steel melting
- (A) Coke oven
- (B) Blast furnace stoves
- (C) Beehive coke oven
- (D) High pressure boiler
- (A) Rotary Kiln
- (B) Tunnel Kiln
- (C) Natural draft furnace
- (D) Batch furnace
- (A) Low reactivity of carbonised residue containing high proportion of iron & sulphur
- (B) Low forced draft & fuel bed temperature
- (C) Thick firebed and preheated primary air
- (D) All
- (A) Type of fuels viz. solid, liquid or gaseous
- (B) Flue gas temperature
- (C) Emissivity of refractory walls
- (D) Initial temperature of the charged stock
- (A) Increasing the draft in the furnace
- (B) Preheating the fuel gas
- (C) Oxygen enrichment of combustion air
- (D) Preheating the combustion air
