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MCQs

Total Questions : 1709 | Page 159 of 171 pages
Question 1581. Capillary action is due to the__________________?
  1.    surface tension
  2.    cohesion of the liquid
  3.    adhesion of the liquid molecules and the molecules on the surface of a solid
  4.    all of the above
  5.    none of the above
 Discuss Question
Answer: Option D. -> all of the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1582. The continuity equation is connected with_______________?
  1.    viscous/unviscous fluids
  2.    compressibility of fluids
  3.    conservation of mass
  4.    steady/unsteady flow
  5.    open channel/pipe flow
 Discuss Question
Answer: Option C. -> conservation of mass
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1583. Liquids transmit pressure equally in all the directions. This is according to_________________?
  1.    Boyle’s law
  2.    Archimedes principle
  3.    Pascal’s law
  4.    Newton’s formula
  5.    Chezy’s equation
 Discuss Question
Answer: Option C. -> Pascal’s law
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1584. The units of dynamic or absolute viscosity are_______________?
  1.    metres2 per sec
  2.    kg sec/meter
  3.    newton-sec per meter
  4.    newton-sec2 per meter
  5.    none of the above
 Discuss Question
Answer: Option C. -> newton-sec per meter
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1585. The process of diffusion of one liquid into the other through a semi-permeable membrane is called _______________?
  1.    viscosity
  2.    osmosis
  3.    surface tension
  4.    cohesion
  5.    diffusivity
 Discuss Question
Answer: Option B. -> osmosis
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1586. The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is ap-proximately_______________?
  1.    1 mm
  2.    5 mm
  3.    10 mm
  4.    20 mm
  5.    30 mm
 Discuss Question
Answer: Option E. -> 30 mm
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1587. The difference of pressure between the inside and outside of a liquid drop is_____________?
  1.    p = Txr
  2.    p = T/r
  3.    p = T/2r
  4.    p = 2T/r
  5.    none of the above
 Discuss Question
Answer: Option D. -> p = 2T/r
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1588. Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the______________?
  1.    force of adhesion
  2.    force of cohesion
  3.    force of friction
  4.    force of diffusion
  5.    none of die above
 Discuss Question
Answer: Option B. -> force of cohesion
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1589. To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than_______________?
  1.    2.4 m above the hydraulic gradient
  2.    6.4 m above the hydraulic gradient
  3.    10.0 m above the hydraulic gradient
  4.    5.0 above the hydraulic gradient
  5.    none of the above
 Discuss Question
Answer: Option B. -> 6.4 m above the hydraulic gradient
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1590. Surface energy per unit area of a surface is numerically equal to ___________________?
  1.    atmospheric pressure
  2.    surface tension
  3.    force of adhesion
  4.    force of cohesion
  5.    viscosity
 Discuss Question
Answer: Option B. -> surface tension
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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