Fluid Mechanics

The property of a fluid which enables it to resist tensile stress is known as___________________? A. compressibility B. surface tensionC. cohesion D. adhesion E. viscosity

The specific weight of water is 1000 kg/m”_________________? A. at normal pressure of 760 mm B. at 4°C temperature C. at mean sea levelD. all the above E. none of the above

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. laminarD. uniform E. static

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 frictionlessE. it is at rest…

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 E. 9 m/sec

For very great pressures, viscosity of moss gases and liquids__________________? A. remains same B. increases C. decreasesD. shows erratic behavior E. none of the above

Viscosity of water in comparison to mercury is_________________? A. higher B. lower C. same D. higher/lower depending on temperature E. unpredictable

The bulk modulus of elasticity___________________? A. has the dimensions of 1/pressureB. increases with pressure C. is large when fluid is more compressible D. is independent of pressure and viscosity E. is directly proportional to…

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. 10,000E. 21,000

Units of surface tension are____________________? A. energy/unit area B. distanceC. both of the above D. it has no units E. none of the above