Related Mcqs:

1. Bernoulli’s equation for steady, frictionless, continuous flow states that the ______________ at all sections is same?

   A. Total pressure
   B. Total energy
   C. Velocity head
   D. None of these

2. For turbulent flow of an incompressible fluid through a pipe, the flow rate „Q‟ is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent ‘n’ is_________________?

   A. 1
   B. 0
   C. < 1
   D. > 1

3. In a fully turbulent flow (Re > 105) in a pipe of diameter ‘d’, for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is_______________?

   A. d
   B. d2
   C. d2.5
   D. d4

4. For one dimensional flow of an incompressible fluid in unsteady state in x-direction, the continuity equation is given by_______________?

   A. ∂u/∂x = 0
   B. ∂(ρu)/∂x = 0
   C. (∂u/∂x) = – (∂ρ/∂t)
   D. ∂ρ/∂t = 0

5. In an incompressible flow of fluid, the fluid ________________?

   A. Temperature remains constant
   B. Compressibility is greater than zero
   C. Density does not change with pressure & temperature
   D. Is frictionless

6. Colebrook equation for friction factor in turbulent flow is given by, f-0.5 = -4 loge [(ε/D) + (1.26/NRe √F). It reduces to Nikuradse equation for a value of (ϵ/D) equal to __________________?

   A. 0
   B. 1
   C. ∞
   D. 0.5

7. ____________ flow means the flow of incompressible fluid with no shear ?

   A. Potential
   B. Streamline
   C. Creep
   D. Boundary layer

8. A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below: Δ P/L = 375 × 103 VOM + 10.94 × 106 V2 OM (SI units) If water is to be used as the fluidising medium, in actual operation, the above bed has a height = 1 m. What is the porosity of the fluidised bed ?

   A. 0.2
   B. 0.5
   C. 0.7
   D. 0.8

9. A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below : Δ P/L = 375 × 103 VOM + 10.94 × 106 V2 OM (SI units) If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is_________________?

   A. 12 mm/s
   B. 16 mm/s
   C. 24 mm/s
   D. 28 mm/s

10. Steady uniform flow is represented by flow through a/an ___________________?

    A. Long pipe at constant rate
    B. Long pipe at decreasing rate
    C. Expanding tube at constant rate
    D. None of these