The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called___________________?
(A) upthrust
(B) reaction
(C) buoyancy
(D) metacentre
(D) center of pressure
Centre of pressure compared to e.g. is______________?
(A) above it
(B) below it
(C) at same point
(D) above or below depending on area of body
(D) none of the above
The center of pressure of a surface subjected to fluid pressure is the point____________________?
(A) on the surface at which resultant pres-sure acts
(B) on the surface at which gravitational force acis
(C) at which all hydraulic forces meet
(D) similar to metacentre
(D) where pressure equivalent to hydraulic thrust will act
Metacentric height is the distance between the metacentre and___________________?
(A) water surface
(B) center of pressure
(C) center of gravity
(D) center of buoyancy
(D) none of the above
The resultant of all normal pressures acts_________________?
(A) at e.g. of body
(B) at center of pressure
(C) vertically upwards
(D) at metacentre
(D) vertically downwards
In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle 9. Sensitivity of inclined tube to sensitivity of U-tube is equal to_________________?
(A) sin 9
(B) sin 9
(C) casS
(D) cos 9
(D) tan 9
Working principle of dead weight pressure gauge tester is based on __________________?
(A) Pascal’s law
(B) Dalton’s law of partial pressure
(C) Newton’s law of viscosity .
(D) Avogadro’s hypothesis
(D) Second law of thermodynamic
Which of the following manometer has highest sensitivity __________________?
(A) U-tube with water
(B) inclined U-tube
(C) U-tube with mercury
(D) micro-manometer with water
(D) displacement type
According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to __________________?
(A) the weight of the body
(B) more than the weight of the body
(C) less than the weight of the body
(D) weight of the fluid displaced by the body
(D) weight of body plus the weight of the fluid displaced hy the body
For a body floating in a liquid the normal pressure exerted by the liquid acts at _________________?
(A) bottom surface of the body
(B) e.g. of the body
(C) metacentre
(D) all points on the surface of the body
(D) all of the above