Fluid Mechanics

671.Which of the fluid forces are not considered in the Reynold's equation of flow?

  1. Viscous forces
  2. Turbulent forces
  3. Pressure forces
  4. Compressibility forces
Correct answer: (D)
Compressibility forces

672.Which of the following assumptions enables the Euler's equation of motion to be integrated?

  1. The fluid is incompressible
  2. The fluid is non-viscous
  3. The continuity equation is satisfied
  4. The flow is rotational and incompressible
Correct answer: (A)
The fluid is incompressible

673.Which of the following can be used for the direct measurement of volumetric flow rate of slurry?

  1. Venturimeter
  2. Orificemeter
  3. Rotameter
  4. Pitot tube
Correct answer: (C)
Rotameter

674.Which of the following can be used to create a flow of gas, where no significant compression is required?

  1. Reciprocating compressor
  2. Blower
  3. Axial flow compressor
  4. Centrifugal compressor
Correct answer: (B)
Blower

675.Which of the following conditions must be satisfied for lift force to be developed?

  1. The body should be bluff body
  2. The body should be stream lined
  3. Circulation around the body is essentially required
  4. The main stream velocity must approach the velocity of sound in that fluid medium
Correct answer: (C)
Circulation around the body is essentially required

676.Which of the following denotes the effect of compressibility in fluid flow?

  1. Weber number
  2. Mach number
  3. Euler number
  4. Reynolds number
Correct answer: (B)
Mach number

677.Which of the following equations applies to the fluid flow through a packed bed for very large Reynolds number?

  1. Fanning equation
  2. Blake-Plummer equation
  3. Hagen-Poiseuille equation
  4. Kozeny-Carman equation
Correct answer: (B)
Blake-Plummer equation

678.Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0) with age/time (t) (where, ε = roughness of the surface after time't'. α = a co-efficient to be experimentally determined)?

  1. ε = ε0 + α.t
  2. ε = ε0 + α.t2
  3. ε = ε0 + α.t3
  4. ε = ε0 + α.t4
Correct answer: (A)
ε = ε0 + α.t

679.Which of the following equations is valid for laminar flow of a fluid through packed bed?

  1. Fanning equation
  2. Kozeny - Karman equation
  3. Hagen-Poiseuille equation
  4. Blake-Plummer equation
Correct answer: (B)
Kozeny - Karman equation

680.Which of the following exemplifies a three dimensional fluid flow?

  1. Fluid flow at the inlet to a nozzle
  2. Fluid flow between parallel plates
  3. Viscous fluid flow between converging plates
  4. None of these
Correct answer: (A)
Fluid flow at the inlet to a nozzle
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