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Total Questions : 3147 | Page 5 of 315 pages
Question 41. The ratio of the normal force of jet of water on a plate inclined at an angle of 30° as compared to that when the plate is normal to jet, is
  1.    1/√2
  2.    1/2
  3.    1
  4.    √2
 Discuss Question
Answer: Option B. -> 1/2
Question 42. The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by
  1.    dQ/Q = 3/2 × (dH/H)
  2.    dQ/Q = 2 × (dH/H)
  3.    dQ/Q = 5/2 × (dH/H)
  4.    dQ/Q = 3 × (dH/H)
 Discuss Question
Answer: Option C. -> dQ/Q = 5/2 × (dH/H)
Question 43. According to Bernoulli's equation
  1.    Z + p/w + v²/2g = constant
  2.    Z + p/w - v²/2g = constant
  3.    Z - p/w + v²/2g = constant
  4.    Z - p/w - v²/2g = constant
 Discuss Question
Answer: Option A. -> Z + p/w + v²/2g = constant
Question 44. The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by
  1.    dQ/Q = (1/2) × (dH/H)
  2.    dQ/Q = (3/4) × (dH/H)
  3.    dQ/Q = (dH/H)
  4.    dQ/Q = (3/2) × (dH/H)
 Discuss Question
Answer: Option D. -> dQ/Q = (3/2) × (dH/H)
Question 45. Which of the following instruments is used to measure flow on the application of Bernoulli's theorem?
  1.    Venturimeter
  2.    Orifice plate
  3.    Nozzle
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 46. Ratio of inertia force to surface Jension is known as
  1.    Mach number
  2.    Froude number
  3.    Reynolds’s number
  4.    Weber’s number
 Discuss Question
Answer: Option D. -> Weber’s number
Question 47. The ratio of absolute viscosity to mass density is known as
  1.    Specific viscosity
  2.    Viscosity index
  3.    Kinematic viscosity
  4.    Coefficient of viscosity
 Discuss Question
Answer: Option C. -> Kinematic viscosity
Question 48. The velocity at which the flow changes from laminar flow to turbulent flow is called
  1.    Critical velocity
  2.    Velocity of approach
  3.    Sub-sonic velocity
  4.    Super-sonic velocity
 Discuss Question
Answer: Option A. -> Critical velocity
Question 49. Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)
  1.    Cc × Cv
  2.    Cc × Cr
  3.    Cv × Cr
  4.    Cc/Cr
 Discuss Question
Answer: Option A. -> Cc × Cv
Question 50. A flow through an expanding tube at constant rate is called
  1.    Steady uniform flow
  2.    Steady non-uniform flow
  3.    Unsteady uniform flow
  4.    Unsteady non-uniform flow
 Discuss Question
Answer: Option B. -> Steady non-uniform flow

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