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MCQs

Total Questions : 1709 | Page 9 of 171 pages
Question 81. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
  1.    center of gravity
  2.    center of buoyancy
  3.    center of pressure
  4.    metacentre
 Discuss Question
Answer: Option C. -> center of pressure
Question 82. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
  1.    meta center
  2.    center of pressure
  3.    center of buoyancy
  4.    center of gravity
 Discuss Question
Answer: Option B. -> center of pressure
Question 83. When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wave), the portion of pipe length subjected to maximum head is
  1.    L/4
  2.    L/3
  3.    L/2
  4.    L
 Discuss Question
Answer: Option A. -> L/4
Question 84. Falling drops of water become spheres due to the property of
  1.    adhesion
  2.    cohesion
  3.    surface tension
  4.    viscosity
 Discuss Question
Answer: Option C. -> surface tension
Question 85. The property of fluid by virtue of which it offers resistance to shear is called
  1.    surface tension
  2.    adhesion
  3.    cohesion
  4.    viscosity
 Discuss Question
Answer: Option D. -> viscosity
Question 86. Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is
  1.    less than d
  2.    between d and 1.5 d
  3.    between 1.5 d and 2d
  4.    greater than 2d
 Discuss Question
Answer: Option A. -> less than d
Question 87. 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
 Discuss Question
Answer: Option A. -> gravity, pressure and viscous
Question 88. 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
 Discuss Question
Answer: Option C. -> steady flow
Question 89. The tendency of a liquid surface to contract is due to the following property
  1.    cohesion
  2.    adhesion
  3.    viscosity
  4.    surface tension
 Discuss Question
Answer: Option D. -> surface tension
Question 90. In case of an airfoil, the separation of flow occurs
  1.    at the extreme rear of body
  2.    at the extreme front of body
  3.    midway between rear and front of body
  4.    any where between rear and front of body depending upon Reynolds number
 Discuss Question
Answer: Option A. -> at the extreme rear of body

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