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MCQs

Total Questions : 3147 | Page 9 of 315 pages
Question 81. Principle of similitude forms the basis of
  1.    Comparing two identical equipments
  2.    Designing models so that the result can be converted to prototypes
  3.    Comparing similarity between design and actual equipment
  4.    Hydraulic designs
 Discuss Question
Answer: Option B. -> Designing models so that the result can be converted to prototypes
Question 82. The water pressure per metre length on a vertical masonry wall of dam is (where w = Specific weight of the liquid, and H = Height of the liquid)
  1.    wH/2
  2.    wH
  3.    wH2/2
  4.    wH2/4
 Discuss Question
Answer: Option C. -> wH2/2
Question 83. The cavitation in a hydraulic machine
  1.    Causes noise and vibration of various parts
  2.    Reduces the discharge of a turbine
  3.    Causes sudden drop in power output and efficiency
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 84. The time oscillation of a floating body with increase in meatcentric height will be
  1.    Same
  2.    Higher
  3.    Lower
  4.    Lower/higher depending on weight of body
 Discuss Question
Answer: Option C. -> Lower
Question 85. If the surface of liquid is convex, men
  1.    Cohesion pressure is negligible
  2.    Cohesion pressure is decreased
  3.    Cohesion pressure is increased
  4.    There is no cohesion pressure
 Discuss Question
Answer: Option C. -> Cohesion pressure is increased
Question 86. The coefficient of discharge for an external mouthpiece depends upon
  1.    Velocity of liquid
  2.    Pressure of liquid
  3.    Area of mouthpiece
  4.    Length of mouthpiece
 Discuss Question
Answer: Option D. -> Length of mouthpiece
Question 87. The value of coefficient of discharge is __________ the value of coefficient of velocity.
  1.    Less than
  2.    Same as
  3.    More than
  4.    None of these
 Discuss Question
Answer: Option A. -> Less than
Question 88. The pressure of a liquid measured with the help of a Piezometer tube is
  1.    Vacuum pressure
  2.    Gauge pressure
  3.    Absolute pressure
  4.    Atmospheric pressure
 Discuss Question
Answer: Option B. -> Gauge pressure
Question 89. A body floating in a liquid is said to be in neutral equilibrium, if its metacentre
  1.    Coincides with its centre of gravity
  2.    Lies above its centre of gravity
  3.    Lies below its centre of gravity
  4.    Lies between the centre of buoyancy and centre of gravity
 Discuss Question
Answer: Option A. -> Coincides with its centre of gravity
Question 90. A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a
  1.    Notch
  2.    Weir
  3.    Mouthpiece
  4.    Nozzle
 Discuss Question
Answer: Option C. -> Mouthpiece

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