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MCQs

Total Questions : 1709 | Page 145 of 171 pages
Question 1441. The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is_____________________?
  1.    32 km
  2.    20 km
  3.    8 km
  4.    4 km
 Discuss Question
Answer: Option A. -> 32 km
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1442. Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is________________?
  1.    less than d
  2.    between d and 1.5 d
  3.    between 1.5 d and 2d
  4.    greater than 2d
 Discuss Question
Answer: Option A. -> less than d
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1443. The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is__________________?
  1.    0.40 cm
  2.    0.20 cm
  3.    0.10 cm
  4.    0.05 cm
 Discuss Question
Answer: Option B. -> 0.20 cm
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1444. Drag force is a function of________________?
1. projected area of the body
2. mass density of the fluid
3. velocity of the body
The correct answer is ?
  1.    (1) and (2)
  2.    (1) and (3)
  3.    (2) and (3)
  4.    (1), (2) and (3)
 Discuss Question
Answer: Option D. -> (1), (2) and (3)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1445. The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is_________________?
  1.    d > m > e
  2.    d > e > m
  3.    e > m > d
  4.    e > d > m
 Discuss Question
Answer: Option D. -> e > d > m
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1446. If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be___________________?
  1.    from reservoir A to reservoirs B and C
  2.    from reservoir B to reservoirs C and A
  3.    from reservoir C to reservoirs A and B
  4.    unpredictable
 Discuss Question
Answer: Option C. -> from reservoir C to reservoirs A and B
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1447. Surge wave in a rectangular channel is an example of_________________?
1. steady flow
2. unsteady flow
3. uniform flow
4. non-uniform flow
The correct answer is?
  1.    (1) and (3)
  2.    (2) and (3)
  3.    (1) and (4)
  4.    (2) and (4)
 Discuss Question
Answer: Option D. -> (2) and (4)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1448. The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is________________?
  1.    1/3
  2.    1/4
  3.    1/2
  4.    2/3
 Discuss Question
Answer: Option A. -> 1/3
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1449. The speed of a pressure wave through a pipe depends upon________________?
  1.    the length of pipe
  2.    the viscosity of fluid
  3.    the bulk modulus for the fluid
  4.    the original head
 Discuss Question
Answer: Option C. -> the bulk modulus for the fluid
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1450. For laminar flow in circular pipes, the Darcy’s friction factor f is equal to_________________?
  1.    16/Re
  2.    32/ Re
  3.    64/ Re
  4.    none of the above where R,, is Reynolds number
 Discuss Question
Answer: Option C. -> 64/ Re
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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