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MCQs

Total Questions : 3147 | Page 137 of 315 pages
Question 1361. 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
Answer: (d).0.375 v₂²/2g
Question 1362. All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow.
  1.    Correct
  2.    Incorrect
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Correct
Answer: (a).Correct
Question 1363. When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)
  1.    0.5 a. √2gH
  2.    0.707 a. √2gH
  3.    0.855 a. √2gH
  4.    a. √2gH
 Discuss Question
Answer: Option A. -> 0.5 a. √2gH
Answer: (a).0.5 a. √2gH
Question 1364. A flow through an expanding tube at increasing rate is called unsteady non-uniform flow.
  1.    Yes
  2.    No
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Yes
Answer: (a).Yes
Question 1365. When a cylindrical vessel containing liquid is revolved, the surface of the liquid takes the shape of
  1.    a triangle
  2.    a paraboloid
  3.    an ellipse
  4.    none of these
 Discuss Question
Answer: Option B. -> a paraboloid
Answer: (b).a paraboloid
Question 1366. With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will
  1.    decrease
  2.    increase
  3.    remain unchanged
  4.    depend upon the characteristics of liquid
 Discuss Question
Answer: Option A. -> decrease
Answer: (a).decrease
Question 1367. Water is __________ liquid.
  1.    a compressible
  2.    an incompressible
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option B. -> an incompressible
Answer: (b).an incompressible
Question 1368. In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice.
  1.    equal to
  2.    one-fourth
  3.    one-third
  4.    one-half
 Discuss Question
Answer: Option B. -> one-fourth
Answer: (b).one-fourth
Question 1369. The density of air is same at different heights.
  1.    Correct
  2.    Incorrect
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option B. -> Incorrect
Answer: (b).Incorrect
Question 1370. Viscous force is the __________ of shear stress due to viscosity and cross-sectionar area of flow.
  1.    sum
  2.    different
  3.    product
  4.    ratio
 Discuss Question
Answer: Option C. -> product
Answer: (c).product

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