241. 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
E. displacement type
242. 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
E. Second law of thermodynamic
243. 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
E. tan 9
244. The resultant of all normal pressures acts_________________?
A. at e.g. of body
B. at center of pressure
C. vertically upwards
D. at metacentre
E. vertically downwards
245. Metacentric height is the distance between the metacentre and___________________?
A. water surface
B. center of pressure
C. center of gravity
D. center of buoyancy
E. none of the above
246. 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
E. where pressure equivalent to hydraulic thrust will act
247. 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
E. none of the above
248. 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
E. center of pressure
249. A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is__________________?
A. 1
B. 5
C. 7
D. 6
250. Center of buoyancy is the___________________?
A. centroid of the displaced volume of fluid
B. center of pressure of displaced volume
C. e.g. of floating ‘body
D. does not exist
E. none of the above
NOTE
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