For hypersonic flow, the Mach number is :
A. unity
B. greater than unity
C. greater than 2
D. greater than 4
E. greater than 1
Normal depth in open channel flow is the depth of flow corresponding to :
A. steady flow
B. unsteady flow
C. laminar flow
D. uniform flow
E. critical flow
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
Metacentre is the point of intersection of :
A. vertical upward force through
B. buoyant force and the center line of body
C. mid point between e.g. and center of buoyancy
D. all of the above
E. none of the above
Center of buoyancy is the :
A. centroid of the displaced volume of fluid
B. center of pressure of displaced volume
C. e.g. of floating ‘body
D. does not exist
E. none of the above
Barometer is used to measure :
A. pressure in pipes, channels etc.
B. atmospheric pressure
C. very low pressure
D. difference of pressure between two points
E. rain level
Poise is the unit of :
A. surface tension
B. capillarity
C. viscosity
D. shear stress in fluids
E. buoyancy
Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called :
A. adhesion
B. cohesion
C. viscosity
D. compressibility
E. surface tension
1 m of air at atmospheric condition weighs approximately :
A. 0.5 kg
B. 1.0 kg
C. 1.3 kg
D. 2.2 kg
E. 3.2 kg
Isothermal compression efficiency can be attained by running the compressor :
A. at very high speed
B. at very slow speed
C. at average speed
D. at zero speed
E. isothermally
