_______________ extractor is used for the concentration of radioactive nuclear waste?

Related Mcqs:

1. _____________ extractor is used for the concentration of radioactive nuclear waste?

   A. Pulsed column
   B. Sieve plate
   C. Mixer-settler
   D. Bollman

2. Radioactive nuclear waste is treated in____________________?

   A. Mixer-settler extractor
   B. Rotating-disc contactor
   C. Pulsed column extractor
   D. Bollman extractor

3. ___________________ extractor uses centrifugal force for separating the two phases?

   A. Treybal
   B. Scheibel
   C. Podbielniak
   D. None of these

4. In a counter-current extractor, as the axial mixing increases, the extraction efficiency______________________?

   A. Increases
   B. Decreases
   C. Remains unchanged
   D. Depends on the pressure of the system

5. Diffusion in concentrated solutions differs from that in dilute solutions, because of the change in the _______________ with the concentration of the solution?

   A. Degree of ideality
   B. Viscosity
   C. Both A & B
   D. Neither A nor B

6. The equipment used in the extraction of highly corrosive radioactive liquids is_______________________?

   A. Pulse column
   B. Spray column
   C. Mixer settler
   D. Baffle tower

7. H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in meters) corresponding to an operating line given by, y = 5x + 0.001 is ______________________?

   A. 2.0
   B. 1.56
   C. 1.0
   D. 0.56

8. The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if___________________?

   A. NSc = 1
   B. NSc = NPr = NLe
   C. NPr = NLe
   D. NSc = NLe

9. The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the_________________?

   A. Differential heat of adsorption
   B. Heat of wetting
   C. Integral heat of adsorption
   D. None of these

10. At a given equilibrium pressure, with increase in temperature, the concentration of adsorbed gas on solid adsorbent __________________?

    A. Increases
    B. Decreases
    C. Remains unchanged
    D. Increases exponentially