Fluid Mechanics

141. The flow in which conditions do not change with time at any point, is known as

  1. one dimensional flow
  2. uniform flow
  3. steady flow
  4. turbulent flow
  5. streamline flow.

Correct answer: (C)
steady flow

142. The flow in which each liquid particle has a definite path and their paths do not cross each other is called

  1. one dimensional flow
  2. uniform flow
  3. steady flow
  4. turbulent flow
  5. streamline flow.

Correct answer: (E)
streamline flow.

143. The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as

  1. one dimensional flow
  2. uniform flow
  3. steady flow
  4. turbulent flow
  5. streamline flow.

Correct answer: (D)
turbulent flow

144. The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as

  1. one dimensional flow
  2. uniform flow
  3. steady flow
  4. turbulent flow
  5. streamline flow.

Correct answer: (B)
uniform flow

145. The flow which neglects changes in a transverse direction is known as

  1. one dimensional flow
  2. uniform flow
  3. steady flow
  4. turbulent flow
  5. streamline flow.

Correct answer: (A)
one dimensional flow

146. The fluid forces considered in the Navier Stokes equation are

  1. gravity, pressure and viscous
  2. gravity, pressure and turbulent
  3. pressure, viscous and turbulent
  4. gravity, viscous and turbulent
  5. none of the above.

Correct answer: (A)
gravity, pressure and viscous

147. The horizontal component of buoyant force is

  1. negligible
  2. same as buoyant force
  3. zero
  4. all of the above.
  5. none of the above.

Correct answer: (C)
zero

148. The increase of temperature results in

  1. increase in viscosity of gas
  2. increase in viscosity of liquid
  3. decrease in viscosity of gas
  4. decrease in viscosity of liquid
  5. (a) and (d) above.

Correct answer: (D)
decrease in viscosity of liquid

149. The line of action of the buoyant force acts through the

  1. centroid of the volume of fluid vertically above the body
  2. centre of the volume of floating body
  3. center of gravity of any submerged body
  4. centriod of the displaced volume of fluid
  5. none of the above.

Correct answer: (D)
centriod of the displaced volume of fluid

150. The line of action of the buoyant force acts through the centroid of the

  1. submerged body
  2. volume of the floating body
  3. volume of the fluid vertically above the body
  4. displaced volume of the fluid
  5. none of the above.

Correct answer: (D)
displaced volume of the fluid

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