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.Management Sciences
Category: Hydraulics and Fluid Mechanics
In an immersed body, center of pressure is ____________________?
A. at the center of gravity
B. above the center of gravity
C. below be center of gravity
D. could be above or below e.g. depending on density of body and liquid
E. unpredictable
Pressure of the order of 10″‘ torr can be measured by_______________ ?
A. Bourdon tube
B. Pirani Gauge
C. micro-manometer
D. ionisastion gauge
E. McLeod gauge
Operation of McLeod gauge used for low pressure measurement is based on the principle of_____________________?
A. gas law
B. Boyle’s law
C. Charle’s law
D. Pascal’s law
E. McLeod’s law
In order that flow takes place between two points in a pipeline, the differential pressure between thes^ points must be more than_________________?
A. frictional force
B. viscosity
C. surface friction
D. all of the above
E. none of the above
The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is ap-proximately____________________?
A. 1 mm
B. 5 mm
C. 10 mm
D. 20 mm
E. 30 mm
The two important forces for a floating body are___________________?
A. buoyancy, gravity
B. buoyancy, pressure
C. buoyancy, inertial
D. inertial, gravity
E. gravity, pressure
Dynamic viscosity of most of the gases with rise in temperature___________________?
A. increases
B. decreases
C. remains unaffected
D. unpredictable
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
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
Property of a fluid by which its own molecules are attracted is called ________________?
A. adhesion
B. cohesion
C. viscosity
D. compressibility
E. surface tension
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