Related Mcqs:

1. In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to____________________?

   A. ∞
   B. 1
   C. 20.8
   D. 2

2. Liquid gradient over the tray results due to the___________________?

   A. Resistance offered to flow of liquids by caps & risers and the flow of gas
   B. Low gas velocity
   C. Large plate spacing
   D. Large reflux ratio

3. Pick out the wrong statement. In an agitated vertical cylindrical reaction vessel, the___________________?

   A. Ratio of liquid depth to tank diameter (i.e. the filling ratio) recommended for most purposes is 1
   B. Filling ratio for dispersing gas in a liquid is 2 for sufficiently long contact period
   C. Flat bottom and conical bottom vessels have low agitation efficiency for agitation of heavy solids in liquids
   D. Dished bottom vessel has very high power consumption

4. Correct use of ‘factor of safety’ is very important in equipment design. It is defined as the ratio of the___________________?

   A. Ultimate stress to breaking stress
   B. Ultimate stress to working stress
   C. Working stress to ultimate stress
   D. None of these

5. In the design of a bag filter, the gas temperature is an important consideration, as it affects the___________________?

   A. Gas density
   B. Gas viscosity
   C. Fibre selection
   D. All A., B. & C.

6. In a bag filter, the pressure drop increases directly as the___________________?

   A. Density of the gas, but is independent of the viscosity of the gas
   B. Density of the gas and inversely as viscosity of the gas
   C. Viscosity of the gas and inversely as density of the gas
   D. None of these

7. The ratio of lateral strain to linear strain is termed as the___________________?

   A. Poisson’s ratio
   B. Bulk modulus
   C. Modulus of elasticity
   D. Shear modulus

8. For pipe flows, head is proportional to ______________ at constant capacity (where D = pipe diameter) ?

   A. 1/D
   B. 1/D2
   C. 1/D5
   D. D2

9. 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

10. The ratio for the rate of washing to the final rate of filtration in a washing type of plate and frame filter is____________________?

    A. 0.25
    B. 0.50
    C. 0.75
    D. 1.25