- (A) Greater is the kinematic viscosity of the liquid, greater is the thickness of the boundary layer
- (B) Blowers develop a maximum pressure of 2 atmospheres
- (C) Friction losses in pipe fittings are generally expressed in terms of velocity heads
- (D) Fanning friction factor in case of turbulent flow of liquids in pipe depends upon relative roughness & Reynolds number
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- (A) 10-15
- (B) 25-30
- (C) 45-50
- (D) 65-70
- (A) Soaking pit
- (B) Open hearth furnace
- (C) Coke ovens
- (D) None of these
- (A) For frictionless flow, the fluid pressure entering the venturi meter will be exactly equal to that leaving the Venturimeter
- (B) Discharge of fluid through a Venturimeter depends upon the gage difference irrespective of the orientation of Venturimeter
- (C) Venturimeter occupies less space than an orificemeter
- (D) Venturimeter incurs less power loss compared to an equivalent orificemeter
- (A) The discharge through a Venturimeter depends upon Δp only and is independent of orientation of the meter
- (B) A Venturimeter with a given gage difference discharges at a greater rate, when the flow is vertically downward through it, than when the flow is vertically upward
- (C) For a given pressure difference, the discharge of gas is greater through a Venturimeter, when compressibility is taken into account, than when it is neglected
- (D) The overall pressure loss is the same in a given pipe line, whether a Venturimeter or a nozzle with the same throat dia is used
- (A) Air is sucked in, so air leaks are more and hence the furnace efficiency is reduced
- (B) The fan operates hot and hence blades are liable to corrosion and erosion
- (C) Positive pressure exists in the furnace
- (D) None of these
- (A) More of excess air
- (B) Less of excess air
- (C) More of CO in flue gas
- (D) More of CO2 in flue gas
- (A) Reheating furnace
- (B) Reverberatory furnace
- (C) Rotary kilns
- (D) Boiler furnace
- (A) Reduces the flue gas temperature and makes the furnace atmosphere oxidising
- (B) Increases the load on the induced draft fan
- (C) Reduces the furnace draught
- (D) All
- (A) Using oxygen enriched combustion air
- (B) Preheating the combustion air
- (C) Reducing the heat loss through furnace openings & doors
- (D) All
