The normal stress is same in all directions at a point in a fluid ___________________?
A. only when the fluid is frictionless
B. only when the fluid is incompressible and has zero viscosity
C. when there is no motion of one fluid layer relative to an adjacent layer
D. irrespective of the motion of one fluid layer relative to an adjacent layer
E. in case of an ideal fluid
Hot wire anemometer is used to measure_______________?
A. discharge
B. velocity of gas
C. pressure intensity of gas
D. pressure intensity of liquid
Property of a fluid by which its own molecules are attracted is called ________________?
A. adhesion
B. cohesion
C. viscosity
D. compressibility
E. surface tension
The property of a fluid which enables it to resist tensile stress is known as________________?
A. compressibility
B. surface tension
C. cohesion
D. adhesion
E. viscosity
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
E. none of the above.