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.Management Sciences
Category: Fluid Mechanics
The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called_______________?
A. upthrust
B. reaction
C. buoyancy
D. metacentre
E. center of pressure
The conditions for the stable equilibrium of a floating body are___________________?
A. the meta-center should lie above the center of gravity
B. the center of buoyancy and the center of gravity must lie on the same vertical line
C. a righting couple should be formed
D. all the above are correct
E. none of the above is correct
Flow of water in a pipe about 3 metres in diameter can be measured by__________________?
A. orifice plate
B. venturi
C. rotameter
D. pitot tube
E. nozzle
The difference of pressure between the inside and outside of a liquid drop is _______________?
A. p = Txr
B. p = T/r
C. p = T/2r
D. p = 2T/r
E. none of the above
The units of dynamic or absolute viscosity are__________________?
A. metres2 per sec
B. kg sec/meter
C. newton-sec per meter
D. newton-sec2 per meter
E. none of the above
All the terms of energy in Bernoulli’s equation have dimension of_______________?
A. energy
B. work
C. mass
D. length
E. time
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
If no resistance is encountered by displacement, such a substance is known as ___________________?
A. fluid
B. water
C. gas
D. perfect solid
E. ideal fluid
When the flow parameters at any given instant remain same at every point, then flow is said to be___________________?
A. quasi static
B. steady state
C. laminar
D. uniform
E. static
The time oscillation of a floating body with increase in metacentric height will be_________________?
A. same
B. higher
C. lower
D. lower/higher depending on weight of body
E. unpredictable
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