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MCQs 1: The ratio of absolute viscosity to mass density is known as_________________?

specific viscosity viscosity index kinematic viscosity coefficient of viscosity coefficient of compressibility
Answer Explanation

MCQs 2: The density of water is 1000 kg/m3 at__________________?

0°C 0°K 4°C D. 20°C all temperature
Answer Explanation

MCQs 3: The property of fluid by virtue of which it offers resistance to shear is called________________?

surface tension adhesion cohesion viscosity all of the above
Answer Explanation

MCQs 4: Alcohol is used in manometer, because____________________?

its vapour pressure is low it provides suitable meniscus for the inclined tube its density is less it provides longer length for a given pressure difference it provides accurate readings
Answer Explanation

MCQs 5: For manometer, a better liquid combination is one having ___________________?

higher surface tension lower surface tension surface tension is no criterion high density and viscosity low density and viscosity
Answer Explanation

MCQs 6: Units of surface tension are____________________?

energy/unit area distance both of the above it has no units none of the above
Answer Explanation

MCQs 7: The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to_________________?

1000 2100 2700 10,000 21,000
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MCQs 8: The bulk modulus of elasticity___________________?

has the dimensions of 1/pressure increases with pressure is large when fluid is more compressible is independent of pressure and viscosity is directly proportional to flow
Answer Explanation

MCQs 9: Viscosity of water in comparison to mercury is_________________?

higher lower same higher/lower depending on temperature unpredictable
Answer Explanation

MCQs 10: For very great pressures, viscosity of moss gases and liquids__________________?

remains same increases decreases shows erratic behavior none of the above
Answer Explanation

MCQs 11: An object having 10 kg mass weighs 9.81kg on a spring balance. The value of ‘g’ at this place is _________________?

10m/sec2 9.81 m/sec2 10.2/m sec 9.75 m/sec2 9 m/sec
Answer Explanation

MCQs 12: The normal stress in a fluid will be constant in all directions at a point only if__________________________?

it is incompressible it has uniform viscosity it has zero viscosity it is frictionless it is at rest
Answer Explanation

MCQs 13: When the flow parameters at any given instant remain same at every point, then flow is said to be___________________?

quasi static steady state laminar uniform static
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MCQs 14: The specific weight of water is 1000 kg/m”_________________?

at normal pressure of 760 mm at 4°C temperature at mean sea level all the above none of the above
Answer Explanation

MCQs 15: The property of a fluid which enables it to resist tensile stress is known as___________________?

compressibility surface tension cohesion adhesion viscosity
Answer Explanation

MCQs 16: Property of a fluid by which its own molecules are attracted is called___________________?

adhesion cohesion viscosity compressibility surface tension
Answer Explanation

MCQs 17: Density of water is maximum at__________________?

0°C 0°K 4°C 100°C 20°C.
Answer Explanation

MCQs 18: If no resistance is encountered by displacement, such a substance is known as ___________________?

fluid water gas perfect solid ideal fluid
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MCQs 19: Practical fluids___________________?

are viscous possess surface tension are compressible possess all the above properties possess none of the above properties
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MCQs 20: Fluid is a substance that___________________?

cannot be subjected to shear forces always expands until it fills any container has the same shear stress.at a point regardless of its motion cannot remain at rest under action of any shear force flows
Answer Explanation

MCQs 21: Select the correct statement?

Local atmospheric pressure depends upon elevation of locality only Standard atmospheric pressure is the mean local atmospheric pressure a* sea level Local atmospheric pressure is always below standard atmospheric pressure A barometer reads the difference be-tween local and standard atmospheric pressure Gauge piessure is equal to atmospheric pressure plus instrument reading
Answer Explanation

MCQs 22: Choose the correct relationship ?

specific gravity = gravity x density dynamicviscosity = kinematicviscosity x density gravity = specific gravity x density kinematicviscosity = dynamicviscosity x density hydrostaticforce = surface tension x gravity
Answer Explanation

MCQs 23: Choose the wrong statement?

Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force Viscosity is due primarily to interaction between fluid molecules Viscosity of liquids decreases with in-crease in temperature Viscosity of liquids is appreciably affected by change in pressure Viscosity is expressed as poise, stoke, or saybolt seconds
Answer Explanation

MCQs 24: Choose the wrong statement ?

The center of buoyancy is located at the center of gravity of the displaced liquid For stability of a submerged body, the center of gravity of body must lie directly below the center of buoyancy If e.g. and center of buoyancy coincide, the submerged body must lie at neutral equilibrium for all positions For stability of floating cylinders or spheres, the e.g. of body must lie below the center of buoyancy All floating bodies are stable
Answer Explanation

MCQs 25: Choose the wrong statement ?

any weight, floating or immersed in a liquid, is acted upon by a buoyant force Buoyant force is equal to the weight of the liquid displaced The point through which buoyant force acts, is called the center of buoyancy Center of buoyancy is located above the center of gravity of the displaced liquid v Relative density of liquids can be determined by means of the depth of flotation of hydrometer
Answer Explanation

MCQs 26: Choose the wrong statement?

The horizontal component of the hydro-static force on any surface is equal to the normal force on the vertical projection of the surface The horizontal component acts through the center of pressure for the vertical projection The vertical component of the hydrostatic force on any surface is equal to the weight of the volume of the liquid above the area he vertical component passes through the center of pressure of the volume Center of pressure acts at a greater depth than center of gravity
Answer Explanation

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