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MCQs

Total Questions : 1709 | Page 3 of 171 pages
Question 21. 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
Question 22. If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will
  1.    rise until its weight equals the buoyant force
  2.    tend to move downward and it may finally sink
  3.    float
  4.    none of the above
 Discuss Question
Answer: Option B. -> tend to move downward and it may finally sink
Question 23. A liquid would wet the solid, if adhesion forces as compared to cohesion forces are
  1.    less
  2.    more
  3.    equal
  4.    less at low temperature and more at high temperature
 Discuss Question
Answer: Option B. -> more
Question 24. A metal with specific gravity of o floating in a fluid of same specific gravity a will
  1.    sink to bottom
  2.    float over fluid
  3.    partly immersed
  4.    be fully immersed with top surface at fluid surface
 Discuss Question
Answer: Option D. -> be fully immersed with top surface at fluid surface
Question 25. The time oscillation of a floating body with increase in metacentric height will be
  1.    same
  2.    higher
  3.    lower
  4.    lower/higher depending on weight of body
 Discuss Question
Answer: Option C. -> lower
Question 26. If the surface of liquid is convex, men
  1.    cohesion pressure is negligible
  2.    cohesion pressure is decreased
  3.    cohesion pressure is increased
  4.    there is no cohesion pressure
 Discuss Question
Answer: Option C. -> cohesion pressure is increased
Question 27. In series-pipe problems
  1.    the head loss is same through each pipe
  2.    the discharge is same through each pipe
  3.    a trial solution is not necessary
  4.    the discharge through each pipe is added to obtain total discharge
 Discuss Question
Answer: Option B. -> the discharge is same through each pipe
Question 28. An ideal flow of any fluid must fulfill the following
  1.    Newton’s law of motion
  2.    Newton’s law of viscosity
  3.    Pascal’ law
  4.    Continuity equation
 Discuss Question
Answer: Option D. -> Continuity equation
Question 29. In a static fluid
  1.    resistance to shear stress is small
  2.    fluid pressure is zero
  3.    linear deformation is small
  4.    only normal stresses can exist
 Discuss Question
Answer: Option D. -> only normal stresses can exist
Question 30. The motion of air mass in a tornado is a
  1.    free vortex motion
  2.    forced vortex motion
  3.    free vortex at center and forced vortex outside
  4.    forced vortex at center and free vortex outside
 Discuss Question
Answer: Option D. -> forced vortex at center and free vortex outside

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