- (A) The shear stress at the pipe (dia = D, length = L) wall in case of laminar flow of Newtonian fluids is (D/4L). Δp
- (B) In the equation, T. gc = k. (du/dy)n the value of ‘n’ for pseudoplastic and Dilatant fluid are 1 respectively
- (C) Shear stress for Newtonian fluid is proportional to the rate of shear in the direction perpendicular to motion
- (D) With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids
Chemical Engineering Mcqs
- (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
- (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
