- (A) Humidity
- (B) Velocity
- (C) Temperature
- (D) All
Chemical Engineering Mcqs
- (A) Ponchon-Savarit method
- (B) McCabe-Thiele method
- (C) Enthalpy concentration method
- (D) Tray to tray calculations
- (A) Wetted wall column
- (B) Gilliland’s
- (C) Winkelmann’s
- (D) Wike’s
- (A) The binary diffusivity in liquids is of the order of 10-5 cm2/sec
- (B) Molecular diffusion in solid is much faster than that in liquids
- (C) Particles movement from higher concentration to lower concentration takes place in diffusion process
- (D) According to Poiseuille’s law, the permeability decreases with increase in temperature for flow of a gas through a given capillary
- (A) Change in barometric pressure does not affect the relative humidity
- (B) In case of a packed tower, the operating velocity is about half of the flooding velocity, generally
- (C) ‘Elution’ means the desorption of the adsorbed solute by a solvent
- (D) The equilibrium moisture content of the solid can be reduced by increasing the absolute humidity
- (A) Mass transfer co-efficient does not account for gas-liquid diffusion
- (B) Diffusion co-efficient and mass transfer co-efficient are not same in any mass transfer operation
- (C) Contacting cold vapor-gas mixture with hot liquid exemplifies humidification process
- (D) Contacting cold liquid with warm vapor-gas mixture exemplifies dehumidification process
- (A) Mechanical agitation is required, if the system has low interfacial tension
- (B) Sieve tray towers are generally used for systems having low interfacial tension
- (C) When Henry’s law constant is very small, then the mass transfer rate is controlled by the gas film resistance
- (D) Taylor-Prandtl analogy for heat and mass transfer considers the transfer through both laminar and turbulent layers
- (A) Co-current absorbers are usually used, when the gas to be dissolved in the liquid is a pure substance
- (B) In case of gas absorption, HETP is equal to HTU, when both the operating line & the equilibrium lines are parallel
- (C) Hatta number is important in case of gas absorption with chemical reaction
- (D) In actual practice, absorption is an endothermic process, while stripping is an exothermic process
- (A) High early strength cement are made from materials having high silica to lime ratio
- (B) The function of gypsum in cement is to enhance its initial setting rate
- (C) Acid resistant cements are known as silicate cement
- (D) Major component of greyish Portland cement is tricalcium silicate
- (A) DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction
- (B) Chloral is obtained by the chlorination of ethyl alcohol
- (C) Insecticides acting on the insects through the respiratory system are called fumigants
- (D) Benzene hexachloride is not a contact insecticide
