A. Natural draft cooling tower
B. Induced draft cooling tower
C. Spray chamber
D. None of these
Related Mcqs:
- Even though bubble cap towers are very effective for humidification operation, they are not used commonly in industries, because of the_________________?
A. High evaporation losses of water
B. High pressure drop of the gas
C. Difficulty in its fabrication
D. None of these - Humidification involves mass transfer between a pure liquid phase and a fixed gas, which is___________________?
A. Insoluble in the liquid
B. Soluble in the liquid
C. Non-ideal in nature
D. At a fixed temperature - 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 cooling effect in a cooling tower can be speeded up by _______________________?
A. Increasing the air velocity and area of exposed wet surface
B. Reducing the barometric pressure
C. Reducing the humidity of the air
D. All A., B. and C. - The cooling effect in a cooling tower cannot be increased by_____________________?
A. Increasing the air velocity over the wet surfaces
B. Reducing the humidity of entering air
C. Lowering the barometric pressure
D. None of these - The term “cooling range” in a cooling tower refers to the difference in the temperature of____________________?
A. Cold water leaving the tower and the wet bulb temperature of the surrounding air
B. Hot water entering the tower and the wet bulb temperature of the surrounding air
C. Hot water entering the tower and the cooled water leaving the tower
D. None of these - Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 × 10-3 kg mole/m2.s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m2 .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is _________________________?
A. 5.6 × 10-4
B. 8.5 × 10-4
C. 5.6 × 10-3
D. 8.5 × 10-3 - Make up water is supplied during cooling tower operation to compensate for water losses due to______________________?
A. Evaporation
B. Blowdown
C. Entrainment
D. All A., B. & C. - 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 - In gas-liquid contact operation, the number of ideal stages, N = (xa – xb)/(xb – x*b). This is true when the stripping factor ‘S’ is ________________?
A. S > 1
B. S < 1
C. S = 1
D. S = ∞
