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MCQs

Total Questions : 3218 | Page 320 of 322 pages
Question 3191. Pressure drop for laminar fluid flow through a circular pipe is given by__________________?
  1.    4f (L/D) (v2/2gc) ρ
  2.    32 (μLV/gc D2)
  3.    16/NRe
  4.    (fLρ/D) (v2/2gc)
 Discuss Question
Answer: Option B. -> 32 (μLV/gc D2)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3192. The equivalent diameter for fluid flow through square cross section channel of side ‘x’, for pressure drop calculation purpose is given by____________________?
  1.    4x
  2.    2x
  3.    x
  4.    √x
 Discuss Question
Answer: Option C. -> x
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3193. The lift of a balloon is_________________?
  1.    Increased, as it rises to a higher altitude
  2.    Due to the weight of the atmospheric air, that it displaces
  3.    Not dependent on the temperature of the atmosphere
  4.    None of these
 Discuss Question
Answer: Option B. -> Due to the weight of the atmospheric air, that it displaces
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3194. For an ideal fluid flow, Reynolds number is___________________?
  1.    2100
  2.    100
  3.    0
  4.    ∞
 Discuss Question
Answer: Option D. -> ∞
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3195. Unit of mass velocity is__________________?
  1.    kg/hr
  2.    kg/m2. hr
  3.    kg/m2
  4.    kg/m3. hr
 Discuss Question
Answer: Option B. -> kg/m2. hr
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3196. Pick out the wrong statement about cavitation?
  1.    Sudden reduction of pressure in a fluid flow system caused by flow separation, vortex formation or abrupt closing of valve leads to cavitation
  2.    Cavitation may be caused due to boiling of liquid by decreasing the pressure resulting in formation & collapse of vapor cavities
  3.    Cavitation begins at higher static pressure and lower velocity in larger diameter pipelines resulting in audible noise
  4.    Large scale cavitation cannot damage pipeline, restrict fluid flow and damage steam turbine blades
 Discuss Question
Answer: Option D. -> Large scale cavitation cannot damage pipeline, restrict fluid flow and damage steam turbine blades
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3197. The hydraulic radius for flow in a rectangular duct of cross-sectional dimension H, W is___________________?
  1.    √(HW/π)
  2.    HW/2 (H + W)2
  3.    HW/4 (H + W)2
  4.    2HW/(H + W)
 Discuss Question
Answer: Option B. -> HW/2 (H + W)2
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3198. Buckingham-π theorem states that in any physical problem including ‘n’ quantities having ‘m’ dimensions, the quantities can be arranged into _____________ independent dimensionless parameters?
  1.    m
  2.    n
  3.    n-m
  4.    n-m
 Discuss Question
Answer: Option C. -> n-m
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3199. When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an______________________?
  1.    Ejector
  2.    Blower
  3.    Injector
  4.    Airlift
 Discuss Question
Answer: Option D. -> Airlift
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3200. Permanent pressure loss in a well designed Venturimeter is about _____________ percent of the venturi differential?
  1.    1
  2.    10
  3.    30
  4.    50
 Discuss Question
Answer: Option B. -> 10
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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