Related Questions

Out of the following gas-liquid contacting devices, for a given set of operating conditions, gas pressure drop is the least in __________ tower.
A Wetted wall
B Bubble cap
C Perforated tray
D Packed
Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty?
A Sieve plate column
B Bubble cap column
C Randomly packed column
D Wetted wall column
A passenger paid 50% customs duty on accompanied baggage items. He paid another 20% sales tax on the total value of the items plus the custom duty paid. The total custom duty and sales tax is Tk. 350. what is the value of the item custom duty and sales tax?
A Tk.400
B Tk. 450
C Tk. 500
D None these
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
Which of these columns incurs the lowest pressure drop?
A Packed column (with stacked packing)
B Packed column (with dumped packing)
C Bubble plate column
D Pulse column
Out of the following flow measuring devices, which one incurs the maximum installation cost as well as pressure loss?
A Flow nozzle
B Venturimeter
C Rotameter
D Orificemeter
Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is
A $$\frac{{\text{Q}}}{2}$$
B $$\frac{{\text{Q}}}{4}$$
C $$\frac{{\text{Q}}}{8}$$
D $$\frac{{\text{Q}}}{{16}}$$
Pressure drop through plate tower as compared to that through packed tower, for the same duty will be
A Less
B More
C Equal
D Either A or B; depends on the packing height
Maintenance cost of a __________ pump for a particular duty is the least.
A Centrifugal
B Reciprocating
C Volute
D Gear
For contacting a highly soluble gas with a liquid
A Bubble the gas through liquid
B Spray the liquid on gas stream
C Either A or B would suffice
D None of these

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