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MCQs

Total Questions : 1709 | Page 147 of 171 pages
Question 1461. In case of an airfoil, the separation of flow occurs________________?
  1.    at the extreme rear of body
  2.    at the extreme front of body
  3.    midway between rear and front of body
  4.    any where between rear and front of body depending upon Reynolds number
 Discuss Question
Answer: Option A. -> at the extreme rear of body
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1462. If x is the distance from leading edge, then the boundary layer thickness in laminar flow varies as________________?
  1.    x
  2.    x/2
  3.    x/3
  4.    x/7
 Discuss Question
Answer: Option A. -> x
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1463. The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be_________________?
  1.    0.423 D
  2.    0.577 D
  3.    0.223 D
  4.    0.707 D
 Discuss Question
Answer: Option B. -> 0.577 D
WHERE D IS THE DEPTH OF FLOW
Question 1464. For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be_________________?
  1.    300
  2.    337.5
  3.    600
  4.    675
 Discuss Question
Answer: Option D. -> 675
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1465. The discharge over a broad crested weir is maximum when the depth of flow is_______________?
  1.    H/3
  2.    H/2
  3.    2 H/5
  4.    2 H/3
 Discuss Question
Answer: Option D. -> 2 H/3
WHERE H IS THE AVAILABLE HEAD
Question 1466. The major loss of energy in long pipes is due to_______________?
  1.    sudden enlargement
  2.    sudden contraction
  3.    gradual contraction or enlargement
  4.    friction
 Discuss Question
Answer: Option D. -> friction
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1467. Which of the following has highest coefficient of discharge ?
  1.    sharp edged orifice
  2.    venturimeter
  3.    Borda’s mouthpiece running full
  4.    CipoUetti weir
 Discuss Question
Answer: Option B. -> venturimeter
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1468. The pressure at the summit of a syphon is_______________?
  1.    equal to atmospheric
  2.    less than atmospheric
  3.    more than atmospheric
  4.    none of the above
 Discuss Question
Answer: Option B. -> less than atmospheric
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1469. Coefficient of velocity for Borda’s mouth piece running full is________________?
  1.    0.611
  2.    0.707
  3.    0.855
  4.    1.00
 Discuss Question
Answer: Option B. -> 0.707
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1470. Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by________________?
  1.    5%
  2.    10%
  3.    15%
  4.    20%
 Discuss Question
Answer: Option A. -> 5%
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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