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MCQs 1: A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ?

10 m/sec 25 m/sec 2 m/sec 50 m/sec 250 m/sec
Answer Explanation

MCQs 2: Ratio of inertia force to elastic force is known as _____________________?

Mach number Froude number Reynold’s number Weber’s number none of the above
Answer Explanation

MCQs 3: For a floating body to be in equilibrium __________________?

meta center should be above e.g center of buoyancy and e.g. must lie on same vertical plane a righting couple should be formed all of the above none of the above
Answer Explanation

MCQs 4: An open vessel of water is accelerated up an inclined plane. The free water surface will___________________?

be horizontal make an angle in direction of inclination of inclined plane make an angle in opposite direction to inclination of inclined plane any one of above is possible none of the above
Answer Explanation

MCQs 5: Center of pressure on an inclined plane is______________________?

at the centroid above the centroid below the centroid at metacentre at center of pressure
Answer Explanation

MCQs 6: The two important forces for a floating body are___________________?

buoyancy, gravity buoyancy, pressure buoyancy, inertial inertial, gravity gravity, pressure
Answer Explanation

MCQs 7: Resultant pressure of the liquid in the case of an immersed body acts through _________________?

center of gravity center of pressure metacentre center of buoyancy in between e.g. and center of pressure
Answer Explanation

MCQs 8: Differential monometer is used to measure _______________________?

pressure in pipes, channels etc atmospheric pressure very low pressure difference of pressure between two points velocity in pipes
Answer Explanation

MCQs 9: The line of action of the buoyant force acts through the centroid of the ___________________?

submerged body volume of the floating body volume of the fluid vertically above the body displaced volume of the fluid none of the above
Answer Explanation

MCQs 10: The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm”. The pressure at 2.5 m below the oil surface will be ___________________?

2 meters of water column 3 meters of water column 3.5 meters of water column 4 m of water column none of the above
Answer Explanation

MCQs 11: In an immersed body, center of pressure is ____________________?

at the center of gravity above the center of gravity below be center of gravity could be above or below e.g. depending on density of body and liquid unpredictable
Answer Explanation

MCQs 12: The time oscillation of a floating body with increase in metacentric height will be________________?

same higher lower lower/higher depending on weight of body unpredictable
Answer Explanation

MCQs 13: The normal stress is same in all directions at a point in a fluid ___________________?

only when the fluid is frictionless only when the fluid is incompressible and has zero viscosity when there is no motion of one fluid layer relative to an adjacent layer irrespective of the motion of one fluid layer relative to an adjacent layer in case of an ideal fluid
Answer Explanation

MCQs 14: Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be ___________________?

1000 kg 4000 kg 2000 kg 8000 kg 16000 kg
Answer Explanation

MCQs 15: Rotameter is a device used to measure____________________?

absolute pressure velocity of fluid flow rotation velocity of air
Answer Explanation

MCQs 16: Flow of water in a pipe about 3 meters in diameter can be measured by_________________?

orifice plate venturi rotameter pitot tube nozzle
Answer Explanation

MCQs 17: True one-dimensional flow occurs when___________________?

the direction and magnitude of the veiocity at all points are identical the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time the magnitude and direction of the velocity do not change from point to point in the fluid the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane velocity, depth, pressure etc. change from point to point in the fluid flow
Answer Explanation

MCQs 18: In the case of steady flow of a fluid, the acceleration of any fluid particle is__________________?

constant variable zero zero under limiting conditions never zero
Answer Explanation

MCQs 19: During the opening of a valve in a pipe line, the flow is___________________?

steady unsteady uniform laminar free vortex type
Answer Explanation

MCQs 20: Gradually varied flow is____________________?

steady uniform non-steady non-uniform non-steady uniform steady non-uniform true one-dimensional
Answer Explanation

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