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Total Questions : 3147 | Page 34 of 315 pages
Question 331. When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is
  1.    1.84(L - 0.1nH)H3/2
  2.    1.84(L - nH)H2
  3.    1.84(L - 0.1nH)H5/2
  4.    1.84(L - nH)H3
 Discuss Question
Answer: Option A. -> 1.84(L - 0.1nH)H3/2
Question 332. A channel is said to be of most economical cross-section, if
  1.    It gives maximum discharge for a given cross-sectional area and bed slope
  2.    It has minimum wetted perimeter
  3.    It involves lesser excavation for the designed amount of discharge
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 333. The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is
  1.    v₁²/2g
  2.    v₂²/2g
  3.    0.5 v₁²/2g
  4.    0.375 v₂²/2g
 Discuss Question
Answer: Option D. -> 0.375 v₂²/2g
Question 334. The power transmitted through the pipe is maximum when the head lost due to friction is equal to
  1.    One-fourth of the total supply head
  2.    One-third of the total supply head
  3.    One-half of the total supply head
  4.    Two-third of the total supply head
 Discuss Question
Answer: Option B. -> One-third of the total supply head
Question 335. The flow which neglects changes in a transverse direction is known as
  1.    One dimensional flow
  2.    Uniform flow
  3.    Steady flow
  4.    Turbulent flow
 Discuss Question
Answer: Option A. -> One dimensional flow
Question 336. If Hg is the gross or total head and hf is the head lost due to friction, then net or effective head (H) is given by
  1.    H = Hg/hf
  2.    H = Hg × hf
  3.    H = Hg + hf
  4.    H = Hg - hf
 Discuss Question
Answer: Option D. -> H = Hg - hf
Question 337. A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow.
  1.    Incompressible
  2.    Compressible
  3.    Viscous
  4.    None of these
 Discuss Question
Answer: Option A. -> Incompressible
Question 338. Coefficient of velocity is defined as the ratio of
  1.    Actual velocity of jet at vena contracta to the theoretical velocity
  2.    Area of jet at vena contracta to the area of orifice
  3.    Actual discharge through an orifice to the theoretical discharge
  4.    None of the above
 Discuss Question
Answer: Option A. -> Actual velocity of jet at vena contracta to the theoretical velocity
Question 339. For measuring flow by a Venturimeter, if should be installed in
  1.    Vertical line
  2.    Horizontal line
  3.    Inclined line with flow downward
  4.    In any direction and in any location
 Discuss Question
Answer: Option D. -> In any direction and in any location
Question 340. The maximum discharge over a broad crested weir is
  1.    0.384 Cd × L × H1/2
  2.    0.384 Cd × L × H3/2
  3.    1.71 Cd × L × H1/2
  4.    1.71 Cd × L × H3/2
 Discuss Question
Answer: Option D. -> 1.71 Cd × L × H3/2

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