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MCQs

Total Questions : 3218 | Page 9 of 322 pages
Question 81. __________ forces do not act in case of fluid flow.
  1.    Elastic
  2.    Tensile
  3.    Vibratory
  4.    Centrifugal
 Discuss Question
Answer: Option B. -> Tensile
Question 82. Which of the following is not an advantage of fluidisation from transfer operation point of view?
  1.    Intimate contact of the fluid with all parts of the solid particles
  2.    Lower fluid pumping power requirement
  3.    Minimisation of temperature variation
  4.    Prevention of particle seggregation
 Discuss Question
Answer: Option B. -> Lower fluid pumping power requirement
Question 83. Dimension of absolute viscosity is
  1.    ML⁻¹T⁻¹
  2.    MLT⁻¹
  3.    ML⁻¹T
  4.    MLT
 Discuss Question
Answer: Option A. -> ML⁻¹T⁻¹
Question 84. One dimensional fluid flow implies the
  1.    Flow in straight lines only
  2.    Uniform flow
  3.    Steady uniform flow
  4.    Flow in which transverse components are zero
 Discuss Question
Answer: Option D. -> Flow in which transverse components are zero
Question 85. Molten soap mass is transported by a __________ pump.
  1.    Diaphragm
  2.    Reciprocating
  3.    Gear
  4.    Centrifugal
 Discuss Question
Answer: Option D. -> Centrifugal
Question 86. Equivalent length of a pipe fitting is
  1.    Dependent on Reynolds number
  2.    Independent of Reynolds number
  3.    Dependent on the length of the pipe
  4.    None of these
 Discuss Question
Answer: Option A. -> Dependent on Reynolds number
Question 87. Pick out the correct statement pertaining to venturimeter.
  1.    A venturimeter with a fixed pressure drop discharges more, when the flow is vertically downward, than when the flow is vertically upward
  2.    The co-efficient of contraction of a venturimeter is always unity
  3.    For a fixed pressure drop, the discharge of a gas through a venturimeter is greater, when compressibility is taken into account, than when it is neglected
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 88. With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost
  1.    Increases
  2.    Decreases
  3.    Remains unchanged
  4.    Increases exponentially
 Discuss Question
Answer: Option B. -> Decreases
Question 89. Self-priming centrifugal pump can be used for
  1.    Booster service
  2.    Pumping liquid fertilisers (e.g. liquid NH₃)
  3.    Pumping industrial wastes
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 90. For laminar flow of Newtonion fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to(where, μ = fluid viscosity )
  1.    μ
  2.    1/μ
  3.    √μ
  4.    1/√μ
 Discuss Question
Answer: Option B. -> 1/μ

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