Related Mcqs:

1. The equivalent diameter for fluid flow through square cross section channel of side ‘x’, for pressure drop calculation purpose is given by____________________?

   A. 4x
   B. 2x
   C. x
   D. √x

2. The pressure drop per unit length of pipe incurred by a fluid ‘X’ flowing through pipe is Δp. If another fluid ‘Y’ having both the specific gravity & density just double of that of fluid ‘X’, flows through the same pipe at the same flow rate/average velocity, then the pressure drop in this case will be__________________?

   A. Δp
   B. 2Δp
   C. Δp2
   D. Δp/2

3. The equivalent diameter for pressure drop calculation for a duct of square cross-section is given by (where, x = each side of the square duct) ?

   A. x
   B. √(πx)
   C. √(2x)
   D. √(x/2)

4. A gas (density = 1.5 kg/m3, viscosity = 2 × 10‒5 kg/m.s) flowing through a packed bed (particle size = 0.5 cm, porosity = 0.5) at a superficial velocity of 2 m/s causes a pressure drop of 8400 Pa/m. The pressure drop for another gas, with density of 1.5 kg/m3and viscosity of 3 × 10‒5kg/m.s flowing at 3 m/s will be________________?

   A. 8400 Pa/m
   B. 12600 Pa/m
   C. 18900 Pa/m
   D. 16800 Pa/m

5. Bernoulli’s equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli’s equation? A. Fluid flow is frictionless & irrotational. B. Fluid flow is steady. C. Fluid flow is uniform & turbulent. D. Fluid is compressible. E. Fluid is incompressible ?

   A. A, C, D
   B. B, D, E
   C. A, B, E
   D. A, D, E

6. For laminar flow of Newtonian fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to (where, μ = fluid viscosity ) ?

   A. μ
   B. 1/μ
   C. √μ
   D. 1/√μ

7. For laminar flow of a fluid through a packed bed of spheres of diameter d, the pressure drop per unit length of bed depends upon the sphere diameter as_________________?

   A. d
   B. d2
   C. d4
   D. d̅ 2

8. Pressure drop for turbulent fluid flow through a circular pipe is given by_________________?

   A. 64/Re
   B. 32μLV/gc.D2
   C. 4f (L/D) (v2/2gc). ρ
   D. f (L/D) (v2/2gc). ρ

9. The fluid velocity varies as the square root of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop of _____________ fluid?

   A. Dilatent
   B. Pseudo-plastic
   C. Bingham plastic
   D. Newtonian

10. The fluid velocity varies as the square of the cylindrical pipe diameter, in case of steady state laminar flow at constant pressure drop, for ______________ fluid?

    A. Newtonian
    B. Dilatant
    C. Pseudo-plastic

    D. Non-Newtonian