1) Which of the following instruments is used to measure flow on the application of Bernoulli’s theorem_________________? a. Venturimeter b. Orifice plate c. nozzle d. pitot tube e. all of the above
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2) Dynamic viscosity of most of the liquids with rise in temperature__________________? a. increases b. decreases c. remains unaffected d. unpredictable e. none of the above
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3) A metal with specific gravity of o floating in a fluid of same specific gravity a will____________________? a. sink to bottom b. float over fluid c. partly immersed d. be fully immersed with top surface at fluid surface e. none of the above
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4) Manometer is used to measure__________________? a. pressure in pipes, channels etc b. atmospheric pressure c. very low pressure d. difference of pressure between two points e. velocity
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5) 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________________?sin 9 a. sin 9 b. sin 9 c. cas 9 d. cos 9 e. tan 9
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6) 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
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7) 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
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8) 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 acts c. at which all hydraulic forces meet d. similar to metacentre e. where pressure equivalent to hydraulic thrust will act
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9) 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
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10) A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at water surface. The hydrostatic force on square surface is____________________? a. 9,000 kg b. 13,500 kg c. 18,000 kg d. 27,000 kg e. 30,000 kg
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11) If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm”, the pressure at a depth of 50 m below the oil surface will be_________________? a. 2 meters of water column b. 3 meters of water column c. 5 meters of water column d. 6 meters of water Column e. 7 meters of water column
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12) When a body floating in a liquid, is displaced slightly, it oscillates about _________________? a. e.g. of body b. center of pressure c. center of buoyancy d. metacentre e. liquid surface
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13) Ratio of inertia force to surface Jension is known as ___________________? a. Mach number b. Froude number c. Reynold’s number d. Weber’s number e. none of the above
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14) Ratio of inertia force to elastic force is known as__________________? a. Mach number b. Froude number c. Reynold’s number d. Weber’s number e. none of the above
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15) For a floating body to be in equilibrium_____________________? a. meta centre should be above e.g. b. centre of buoyancy and e.g. must lie on same vertical plane c. a righting couple should be formed d. all of the above e. none of the above
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16) An open vessel of water is accelerated up an inclined plane. The free water surface will__________________? a. be horizontal b. make an angle in direction of inclination of inclined plane c. make an angle in opposite direction to inclination of inclined plane d. any one of above is possible e. none of the above
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17) Resultant pressure of the liquid in the case of an immersed body acts through____________________? a. centre of gravity b. centre of pressure c. metacentre d. centre of buoyancy e. in between e.g. and centre of pressure
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18) Differential monometer is used to measure___________________? a. pressure in pipes, channels etc. b. atmospheric pressure c. very low pressure d. difference of pressure between two points e. velocity in pipes
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19) The time oscillation of a floating body with increase in metacentric height will be_________________? a. same b. higher c. lower d. lower/higher depending on weight of body e. unpredictable
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20) The normal stress is same in all directions at a point in a fluid_______________? a. only when the fluid is frictionless b. only when the fluid is incompressible and has zero viscosity c. when there is no motion of one fluid layer relative to an adjacent layer d. irrespective of the motion of one fluid layer relative to an adjacent layer e. in case of an ideal fluid
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