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MCQs

Total Questions : 3147 | Page 32 of 315 pages
Question 311. For a floating body to be in equilibrium
  1.    Meta centre should be above e.g.
  2.    Centre of buoyancy and e.g. must lie on same vertical plane
  3.    A righting couple should be formed
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 312. The specific speed of a hydraulic turbine depends upon
  1.    Speed and power developed
  2.    Discharge and power developed
  3.    Speed and head of water
  4.    Speed, power developed and head of water
 Discuss Question
Answer: Option D. -> Speed, power developed and head of water
Question 313. The runaway speed of a hydraulic turbine is the speed
  1.    At full load
  2.    At which there will be no damage to the runner
  3.    Corresponding to maximum overload permissible
  4.    At which the turbine will run freely without load
 Discuss Question
Answer: Option D. -> At which the turbine will run freely without load
Question 314. Specific speed for reaction turbines ranges from
  1.    0 to 4.5
  2.    10 to 100
  3.    80 to 200
  4.    250 to 300
 Discuss Question
Answer: Option B. -> 10 to 100
Question 315. Resultant pressure of the liquid in the case of an immersed body acts through
  1.    Centre of gravity
  2.    Centre of pressure
  3.    Metacentre
  4.    Centre of buoyancy
 Discuss Question
Answer: Option B. -> Centre of pressure
Question 316. Buoyant force is
  1.    The resultant force acting on a floating body
  2.    The resultant force on a body due to the fluid surrounding it
  3.    Equal to the volume of liquid displaced
  4.    The force necessary to maintain equilibrium of a submerged body
 Discuss Question
Answer: Option B. -> The resultant force on a body due to the fluid surrounding it
Question 317. The ratio of the inertia force to the elastic force is called
  1.    Reynold's number
  2.    Froude's number
  3.    Weber's number
  4.    Mach number
 Discuss Question
Answer: Option D. -> Mach number
Question 318. The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to
  1.    Half the depth
  2.    Half the breadth
  3.    Twice the depth
  4.    Twice the breadth
 Discuss Question
Answer: Option A. -> Half the depth
Question 319. Specific weight of sea water is more that of pure water because it contains
  1.    Dissolved air
  2.    Dissolved salt
  3.    Suspended matter
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 320. The gross or total head of the turbine is the ___________ of the water levels at the head race and tail race.
  1.    Sum
  2.    Difference
  3.    Product
  4.    None of these
 Discuss Question
Answer: Option B. -> Difference

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