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.Management Sciences
Category: Hydraulics and Fluid Mechanics
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
The stress-strain relation of the newtoneon fluid is________________?
A. linear
B. parabolic
C. hyperbolic
D. inverse type
E. none of the above
If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be_________________?
A. higher than the surface of liquid
B. the same as the surface of liquid
C. lower than the surface of liquid
D. unpredictable
E. none of the above
A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will__________________?
A. increase
B. decrease
C. remain same
D. increase/decrease depending on depth of immersion
E. unpredictable
Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be ___________________?
A. 1000 kg
B. 4000 kg
C. 2000 kg
D. 8000 kg
E. 16000 kg
Fluid is a substance that_______________?
A. cannot be subjected to shear forces
B. always expands until it fills any container
C. has the same shear stress.at a point regardless of its motion
D. cannot remain at rest under action of any shear force
E. flows
Uniform flow occurs when___________________?
A. the direction and magnitude of the velocity at all points are identical
B. the velocity of successive fluid pai-ticles, at any point, is the same at suc¬cessive periods of time
C. the magnitude and direction of the velocity do not change from point to point in the fluid
D. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plsr.e
E. velocity, depth, pressure, etc. change from point to point in the fluid flow
In the case of steady flow of a fluid, the acceleration of any fluid particle is__________________?
A. constant
B. variable
C. zero
D. zero under limiting conditions
E. never zero
Buoyant force is___________________?
A. resultant force acting on a floating body
B. equal to the volume of liquid displaced
C. force necessary to keep a body in equilibrium
D. the resultant force on a body due to the fluid surrounding it
E. none of the above
The peoperty by virtue of which a liquid opposes relative motion between its different layers is called_________________?
A. surface tension
B. co-efficient of viscosity
C. viscosity
D. osmosis
E. cohesion
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