Q1. Alcohol is used in manometers because
(A) it has low vapour pressure
(B) it is clearly visible
(C) it has low surface tension
(D) it can provide longer column due to low density

Q2. Specific weight of sea water is more that of pure water because it contains
(A) dissolved air
(B) dissolved salt
(C) suspended matter
(D) All of these

Q3. Free surface of a liquid tends to contract to the smallest possible area due to force of
(A) surface tension
(B) viscosity
(C) friction
(D) cohesion

Q4. A bucket of water is hanging from a spring balanc An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will
(A) increase
(B) decrease
(C) remain same
(D) increase/decrease depending on depth of immersion

Q5. Falling drops of water become spheres due to the property of
(B) cohesion
(C) surface tension
(D) viscosity

Q6. A liquid would wet the solid, if adhesion forces as compared to cohesion forces are
(A) less
(B) more
(C) equal
(D) less at low temperature and more at high temperature

Q7. If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be
(A) higher than the surface of liquid
(B) the same as the surface of liquid
(C) lower than the surface of liquid
(D) unpredictable

Q8. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
(A) meta center
(B) center of pressure
(C) center of buoyancy
(D) center of gravity

Q9. The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to
(A) Buoyancy
(B) Equilibrium of a floating body
(C) Archimedes’ principle
(D) Bernoulli’s theorem

Q10. The resultant upward pressure of the fluid on an immersed body is called
(A) upthrust
(B) buoyancy
(C) center of pressure
(D) All of these are correct

Q11. The conditions for the stable equilibrium of a floating body are
(A) the meta-center should lie above the center of gravity
(B) the center of buoyancy and the center of gravity must lie on the same vertical line
(C) a righting couple should be formed
(D) All of these

Q12. Poise is the unit of
(A) surface tension
(B) capillarity
(C) viscosity
(D) shear stress in fluids

Q13. Metacentric height is given as the distance between
(A) the center of gravity of the body and the meta center
(B) the center of gravity of the body and the center of buoyancy
(C) the center of gravity of the body and the center of pressure
(D) center of buoyancy and metacentre

Q14. The buoyancy depends on
(A) mass of liquid displaced
(B) viscosity of the liquid
(C) pressure of the liquid displaced
(D) depth of immersion

Q15. The center of gravity of the volume of the liquid displaced by an immersed body is called
(A) meta-center
(B) center of pressure
(C) center of buoyancy
(D) center of gravity

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