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MCQs

Total Questions : 1709 | Page 143 of 171 pages
Question 1421. Coefficient of contraction for an external cylindrical mouthpiece is_________________?
  1.    1.00
  2.    0.855
  3.    0.7H
  4.    0.611
 Discuss Question
Answer: Option A. -> 1.00
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1422. Ay between two stream lines represents________________?
  1.    velocity
  2.    discharge
  3.    head
  4.    pressure
 Discuss Question
Answer: Option B. -> discharge
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1423. In a Sutro weir, the discharge is proportional to________________?
  1.    H1/2
  2.    H3/2
  3.    H5/2
  4.    H
 Discuss Question
Answer: Option D. -> H
WHERE H IS HEAD
Question 1424. The boundary layer thickness in turbulent flow varies as______________?
  1.    x”7
  2.    x,/2
  3.    x4/5
  4.    x3/5
 Discuss Question
Answer: Option C. -> x4/5
WHERE X IS THE DISTANCE FROM LEADING EDGE
Question 1425. Which of the following statements is correct___?
  1.    Lower critical Reynolds number is of no practical significance in pipe flow problems.
  2.    Upper critical Reynolds number is significant in pipe flow problems.
  3.    Lower critical Reynolds number has the value 2000 in pipe flow
  4.    Upper critical Reynolds number is the number at which turbulent flow changes to laminar flow
 Discuss Question
Answer: Option A. -> Lower critical Reynolds number is of no practical significance in pipe flow problems.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1426. The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is_______________?
  1.    constant over the cross section
  2.    parabolic distribution across the section
  3.    zero at the mid plane and varies linearly with distance from mid plane
  4.    zero at plates and increases linearly to midpoint
 Discuss Question
Answer: Option C. -> zero at the mid plane and varies linearly with distance from mid plane
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1427. The value of friction factor ‘f’ for smooth pipes for Reynolds number 106 is approximately equal to________________?
  1.    0.1
  2.    0.01
  3.    0.001
  4.    0.0001
 Discuss Question
Answer: Option B. -> 0.01
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1428. Stanton diagram is a______________?
  1.    log-log plot of friction factor against Reynolds number
  2.    log-log plot of relative roughness against Reynolds number
  3.    semi-log plot of friction factor against Reynolds number
  4.    semi-log plot of friction factor against relative roughness
 Discuss Question
Answer: Option A. -> log-log plot of friction factor against Reynolds number
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1429. When an ideal fluid flows past a sphere________________?
  1.    highest intensity of pressure occurs around the circumference at right angles to flow
  2.    lowest pressure intensity occurs at front stagnation point
  3.    lowest pressure intensity occurs at rear stagnation point
  4.    total drag is zero
 Discuss Question
Answer: Option D. -> total drag is zero
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1430. In which of the following the friction drag is generally larger than pressure drag?
  1.    a circular disc or plate held normal to flow
  2.    a sphere
  3.    a cylinder
  4.    an airfoil
 Discuss Question
Answer: Option D. -> an airfoil
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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