For hypersonic flow, the Mach number is___________________?
(A) unity
(B) greater than unity
(C) greater than 2
(D) greater than 4
(D) greater than 10
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
(D) critical flow
A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?
(A) 900 minutes
(B) 4 minutes
(C) 4 x (225)3/2 minutes
(D) 4 (225)1/3 minutes
(D) 4 x V225 minutes
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
(D) none of the above
Metacentre is the point of intersection of _________________________?
(A) vertical upward force through e.g. of body and center line of body
(B) buoyant force and the center line of body
(C) mid point between e.g. and center of buoyancy
(D) all of the above
(D) 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
(D) 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
(D) rain level
Poise is the unit of________________?
(A) surface tension
(B) capillarity
(C) viscosity
(D) shear stress in fluids
(D) 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
(D) surface tension
Which of the following is the unit of kinematic viscosity _________________?
(A) pascal
(B) poise
(C) stoke
(D) faraday
(D) none of the above