Lakshya Education MCQs

Question: With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will
Options:
A. Decrease
B. Increase
C. Remain unchanged
D. Depend upon the characteristics of liquid
Answer: Option A

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More Questions on This Topic :

Question 1. Mercury does not wet glass. this is due to property of liquid known as
  1.     Adhesion
  2.     Cohesion
  3.     Surface tension
  4.     Viscosity
Answer: Option C
Question 2. Metacentre is the point of intersection of
  1.     Vertical upward force through e.g. of body and center line of body
  2.     Buoyant force and the center line of body
  3.     Midpoint between e.g. and center of buoyancy
  4.     All of the above
Answer: Option B
Question 3. The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) is
  1.     ηh = ηo × ηm
  2.     ηm = ηm × ηh
  3.     ηo = ηh × ηm
  4.     None of these
Answer: Option C
Question 4. Meta-centric height is given as the distance between
  1.     The center of gravity of the body and the metacenter
  2.     The center of gravity of the body and the center of buoyancy
  3.     The center of gravity of the body and the center of pressure
  4.     Center of buoyancy and metacenter
Answer: Option A
Question 5. Steady flow occurs when
  1.     The direction and magnitude of the velocity at all points are identical
  2.     The velocity of successive fluid particles, at any point, is the same at successive periods of time
  3.     The magnitude and direction of the velocity do not change from point to point in the fluid
  4.     The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane
Answer: Option B
Question 6. True one-dimensional flow occurs when
  1.     The direction and magnitude of the velocity at all points are identical
  2.     The velocity of successive fluid particles, at any point, is the same at successive periods of time
  3.     The magnitude and direction of the velocity do not change from point to point in the fluid
  4.     The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane
Answer: Option A

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