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MCQs

Total Questions : 3147 | Page 7 of 315 pages
Question 61. A hydraulic coupling belongs to the category of
  1.    Power absorbing machines
  2.    Power developing machines
  3.    Energy transfer machines
  4.    Energy generating machines
 Discuss Question
Answer: Option C. -> Energy transfer machines
Question 62. 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 63. The Reynold's number of a ship is __________ to its velocity and length.
  1.    Directly proportional
  2.    Inversely proportional
  3.    Square root of velocity
  4.    None of these
 Discuss Question
Answer: Option A. -> Directly proportional
Question 64. The pressure of the liquid flowing through the divergent portion of a Venturimeter
  1.    Remains constant
  2.    Increases
  3.    Decreases
  4.    Depends upon mass of liquid
 Discuss Question
Answer: Option C. -> Decreases
Question 65. The velocity corresponding to Reynold number of 2000 is called
  1.    Sub-sonic velocity
  2.    Super-sonic velocity
  3.    Lower critical velocity
  4.    Higher critical velocity
 Discuss Question
Answer: Option C. -> Lower critical velocity
Question 66. The velocity of the liquid flowing through the divergent portion of a Venturimeter
  1.    Remains constant
  2.    Increases
  3.    Decreases
  4.    Depends upon mass of liquid
 Discuss Question
Answer: Option C. -> Decreases
Question 67. A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is
  1.    0.46
  2.    0.64
  3.    0.78
  4.    0.87
 Discuss Question
Answer: Option B. -> 0.64
Question 68. Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)
  1.    Q = π.D.Vf
  2.    Q = π.b.Vf
  3.    Q = π.D.bf.V
  4.    Q = D.b.Vf
 Discuss Question
Answer: Option C. -> Q = π.D.bf.V
Question 69. The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as
  1.    Path line
  2.    Stream line
  3.    Steak line
  4.    Potential line
 Discuss Question
Answer: Option B. -> Stream line
Question 70. 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

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