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MCQs

Total Questions : 3147 | Page 8 of 315 pages
Question 71. In order to avoid tendency of separation at throat in a Venturimeter, the ratio of the diameter at throat to the diameter of pipe should be
  1.    1/16 to 1/8
  2.    1/8 to 1/4
  3.    1/4 to 1/3
  4.    1/3 to 1/2
 Discuss Question
Answer: Option D. -> 1/3 to 1/2
Question 72. 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 73. 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 74. The pressure measured with the help of a Piezometer tube is in
  1.    N/mm2
  2.    N/m2
  3.    Head of liquid
  4.    All of these
 Discuss Question
Answer: Option C. -> Head of liquid
Question 75. According to equation of continuity,
  1.    w1a1 = w2a2
  2.    w1v1 = w2v2
  3.    a1v1 = a2v2
  4.    a1/v1 = a2/v2
 Discuss Question
Answer: Option C. -> a1v1 = a2v2
Question 76. A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be
  1.    (2A√H₁)/(Cd × a√2g)
  2.    (2AH₁)/(Cd × a√2g)
  3.    (2AH₁3/2)/(Cd × a√2g)
  4.    (2AH₁²)/(Cd × a√2g)
 Discuss Question
Answer: Option A. -> (2A√H₁)/(Cd × a√2g)
Question 77. The vapour pressure over the concave surface is
  1.    Less man the vapour pressure over the plane surface
  2.    Equal to the vapour pressure over the plane surface
  3.    Greater than the vapour pressure over the plane surface
  4.    Zero
 Discuss Question
Answer: Option A. -> Less man the vapour pressure over the plane surface
Question 78. The equation of continuity holds good when the flow
  1.    Is steady
  2.    Is one dimensional
  3.    Velocity is uniform at all the cross sections
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 79. Pitot tube is used for measurement of
  1.    Pressure
  2.    Flow
  3.    Velocity
  4.    Discharge
 Discuss Question
Answer: Option C. -> Velocity
Question 80. According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed)
  1.    A × √(m × i)
  2.    C × √(m × i)
  3.    AC × √(m × i)
  4.    mi × √(A × C)
 Discuss Question
Answer: Option C. -> AC × √(m × i)

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