Surface tension _____________________?
(A) acts in the plane of the interface normal to any line in the surface
(B) is also known as capillarity
(C) is a function of the curvature of the interface
(D) decreases with fall in temperature
(D) has no units
The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to _________________?
(A) 1000
(B) 2100
(C) 2700
(D) 10,000
(D) 21,000.
The bulk modulus of elasticity __________________?
(A) has the dimensions of 1/pressure
(B) increases with pressure
(C) is large when fluid is more compressible
(D) is independent of pressure and viscosity
(D) is directly proportional to flow.
Viscosity of water in comparison to mercury is ______________________?
(A) higher
(B) lower
(C) same
(D) higher/lower depending on temperature
(D) unpredictable.
For very great pressures, viscosity of moss gases and liquids __________________?
(A) remains same
(B) increases
(C) decreases
(D) shows erratic behaviour
(D) none of the above.
The surface tension of mercury at normal temperature compared to that of water is____________________?
(A) more
(B) less
(C) same
(D) more or less depending on size of glass tube
(D) none of the above.
An object having 10 kg mass weighs 9.81kg on a spring balance. The value of ‘g’ at this place is___________________?
(A) 10m/sec2
(B) 9.81 m/sec2
(C) 10.2/m sec
(D) 9.75 m/sec2
(D) 9 m/sec .
The normal stress in a fluid will be constant in all directions at a point only if_________________?
(A) it is incompressible
(B) it has uniform viscosity
(C) it has zero viscosity
(D) it is frictionless
(D) it is at rest.
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
(D) static.
The specific weight of water is 1000 kg/m” _______________?
(A) at norma] pressure of 760 mm
(B) at 4°C temperature
(C) at mean sea level
(D) all the above
(D) none of the above.