The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called____________________?

Related Mcqs:

1. In a distillation column, minimum clearance to be maintained between the overflow weir and the last row of the bubble caps is ______________ cms?

   A. 2.5
   B. 7.5
   C. 15
   D. 20

2. Heat transfer co-efficient, hG(Kcal/hr.m2 .°C) and mass velocity of air, G (kg/hr.m2 ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to ____________________?

   A. hG = 1.004G0.37
   B. 1.004G0.8
   C. hG = 0.0176G0.37
   D. 0.0176G1.37

3. The length of straight rectangular weir used on cross-flow trays is generally ________________ the column diameter ?

   A. 0.6-0.8 times
   B. Equal to
   C. Twice
   D. 2 ft irrespective of (for column > 3 ft diameter)

4. With increase in gas flow rate to fabric surface area ratio (Nm3/hr/m2 fabric surface area), the size & the cost of a bag filter___________________?

   A. Increases
   B. Decreases
   C. Remain unaffected
   D. None of these

5. Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about __________ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate ?

   A. 2
   B. ½
   C. 4
   D. 8

6. For storing hazardous chemicals in large storage tanks, the minimum safe distance between the two tanks should range between ______________________ times the tank diameter?

   A. 1 to 1.5
   B. 2.5 to 3.5
   C. 4 to 5
   D. 6 to 8

7. Tube side heat transfer co-efficient for turbulent flow of liquid through tubes is proportional to___________________?

   A. G0.2
   B. G0.5
   C. G0.8
   D. G1.5

8. The average velocity in the tubes of a 1-4 heat exchanger is ______________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate ?

   A. 2
   B. 1/2
   C. 4
   D. 1/4

9. In a shell and tube heat exchanger, the shortest centre to centre distance between the adjacent tubes is__________________?

   A. Called tube pitch
   B. Called tube clearance
   C. Always less than the diameter of the tube
   D. None of these

10. The distance between the centres of a rivet hole to the nearest edge of the plate is called _________________?

    A. Pitch
    B. Margin
    C. Back pitch
    D. None of these