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.Management Sciences
Category: Hydraulics and Fluid Mechanics
To avoid an interruption in the flow of a syphon, an air vessel is provided______________?
A. at the inlet
B. at the outlet
C. at the summit
D. ay nay point between inlet and outlet
E. none of the above
A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is__________________?
A. 0.83
B. 0.6
C. 0.4
D. 0.3
E. none of the above
Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the_______________?
A. force of adhesion
B. force of cohesion
C. force of friction
D. force of diffusion
E. none of die above
Mercury is often used in barometer because _________________?
A. it is the best liquid
B. the height of barometer will be less
C. its vapour pressure is so low that it may be neglected
D. both B. and C.
E. it moves easily
The buoyancy depends on__________________?
A. mass of liquid displaced
B. viscosity of the liquid
C. pressure of the liquid displaced
D. depth of immersion
E. none of the above.
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
Resultant pressure of the liquid in the case of an immersed body acts through _________________?
A. center of gravity
B. center of pressure
C. metacentre
D. center of buoyancy
E. in between e.g. and center of pressure
4-61. Kinematic viscosity is equal to________________?
A. dynamic viscosity/density
B. dynamicviscosity x density
C. density/dynamic viscosity
D. 1/dynamicviscosity x density
E. same as dynamic viscosity
At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be_______________?
A. minimum
B. maximum
C. zero
D. negative value
E. could be any value
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