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.Management Sciences
Category: Fluid Mechanics
Choose the wrong statement?
A. Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force
B. Viscosity is due primarily to interaction between fluid molecules
C. Viscosity of liquids decreases with in-crease in temperature
D. Viscosity of liquids is appreciably affected by change in pressure
E. Viscosity is expressed as poise, stoke, or saybolt seconds
For a floating body to be in stable equilibrium, its metacentre should be___________________?
A. below the center of gravity
B. below the center of buoyancy
C. above the center of buoyancy
D. between e.g. and center of pressure
E. above the center of gravity
Newton’s law of viscosity is a relationship between____________________?
A. shear stress anctthejiate of angular distortion
B. shear stress and viscosity
C. shear stress, velocity and viscosity
D. pressure, velocity and viscosity
E. shear stress, pressure and rate of angular distortion
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
The upper surface of a weir over which water flows is known is_____________________?
A. crest
B. nappe
C. sill
D. weir top
E. contracta
The speed of sound in a ideal gas varies directly as its__________________?
A. pressure
B. temperature
C. density
D. modulus of elasticity
E. absolute temperature
Free surface of a liquid tends to contract to the smallest possible area due to force of_______________?
A. surface tension
B. viscosity
C. friction
D. cohesion
E. adhesion
The bulk modulus of elasticity with increase in pressure__________________?
A. increases
B. decreases
C. remains constant
D. increases first up to certain limit and then decreases
E. unpredictable
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
Which of the following meters is not associated with viscosity____________________?
A. Red wood
B. Say bolt
C. Engler
D. Orsat
E. none of the above
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