A. Enthalpy balance only
B. Material balance only
C. Both enthalpy and material balances
D. The assumption of constant molal-overflow
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Related Mcqs:
- The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2/m3)_________________?
A. 500
B. 1200
C. 900
D. 800 - The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2/m3) ?
A. 500
B. 1200
C. 900
D. 800 - Fractional solvent extraction______________________?
A. Employs only one solvent
B. Employs two solvents
C. Results in low interfacial tension
D. None of these - In a vapor-liquid contacting equipment, the overall gas phase mass transfer co-efficient (M.T.C), KG is related to individual co-efficients (KG and KL) as ___________________ ?
A. KG = 1/KG + m/KL
B. 1/KG = 1/KG + m/KL
C. 1/KG = 1/KL + m/KG
D. KG = 1/KL + m/KG - Dorr thickener is an equipment used for______________________?
A. Classification
B. Sedimentation
C. Clarification
D. Leaching - Dorr thickener is an equipment used for___________________?
A. Classification
B. Sedimentation
C. Clarification
D. Leaching - The equipment used in the extraction of highly corrosive radioactive liquids is_______________________?
A. Pulse column
B. Spray column
C. Mixer settler
D. Baffle tower - Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is _______________ the liquid head available in the downcomer?
A. Less than
B. More than
C. Same as
D. Very much less - The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is_________________?
A. Natural draft cooling tower
B. Induced draft cooling tower
C. Spray chamber
D. None of these - An alkaline solution is used to reduce the concentration of carbon dioxide in a stream from 10% to 0.1% by absorption with irreversible chemical reaction. The overall number of transfer units based on gas phase is ?
A. 9.21
B. 4.605
C. 100
D. 0.001
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