Power required for agitation depends upon the______________________?

Related Mcqs:

1. The approximate liquid depth in an agitation tank is equal to (where, d = tank diameter)_________________?

   A. 0.5 d
   B. 0.75 d
   C. d
   D. 2 d

2. The diameter of a propeller agitator used in agitation tank ranges from ____________ percent of the tank diameter and its peripheral speed is normally 300 to 500 metres/minute ?

   A. 5 to 10
   B. 15 to 30
   C. 40 to 50
   D. 55 to 75

3. Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscosity above ____________________ poise?

   A. 300
   B. 600
   C. 1000
   D. 1500

4. Excessive liquid gradient on a tray may result in the______________________?

   A. Maldistribution of gas
   B. Back trapping
   C. Gas blowing beneath cap skit
   D. All A., B. and C.

5. Height equivalent to a theoretical plate (HETP) is the height of packing that will give the same separation as one theoretical plate in gas-liquid mass transfer operations like distillation, absorption/stripping and humidification/dehumidification. HETP which is experimentally determined, depends upon the_______________?

   A. Flow rates of each fluid
   B. Type and size of packing
   C. Concentration of each fluid
   D. All A, B. & C.

6. The value of fouling factor depends upon the__________________?

   A. Characteristic of process fluid
   B. Velocity of process fluid containing suspended solids
   C. Suspended solids in the fluid
   D. All A., B. and C.

7. The retention time of material in a rotary dryer depends upon its ______________________?

   A. rpm
   B. Slope & length
   C. Flights arrangement
   D. All A., B. and C.

8. The force due to wind load acting on a tall vessel depends upon its___________________?

   A. Shape
   B. Outside diameter
   C. Height
   D. All A, B. & C.

9. n the agitators, the power required will be changed with the increase of diameter of agitator D. as ____________________?

   IA. D2
   B. D5
   C. D
   D. D9

10. To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of_________________?

    A. (1.2)3/2
    B. (1.2)3/5
    C. (1.2)2/3
    D. (1.2)5/3