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.Management Sciences
Category: Hydraulics and Fluid Mechanics
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
Rotameter is a device used to measure____________________?
A. absolute pressure
B. velocity of fluid
C. flow
D. rotation
E. velocity of air
A streamline is defined as the line ________________?
A. parallel to central axis flow
B. parallel to outer surface of pipe
C. of equal yelocity in a flow
D. along which the pressure drop is uniform
E. which occurs in all flows
Center of pressure on an inclined plane is______________________?
A. at the centroid
B. above the centroid
C. below the centroid
D. at metacentre
E. at center of pressure
The center of gravity of the volume of the liquid displaced by an immersed body is called________________?
A. meta-center
B. center of pressure
C. center of buoyancy
D. center of gravity
E. none of the above
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