Hydraulic and Fluid Mechanics

241. The body will sink down if the force of buoyancy is

1. Equal to
2. Less than
3. More than
4. None of these

View answer

242. The bulk modulus of elasticity

1. Has the dimensions of 1/pressure
2. Increases with pressure
3. Is large when fluid is more compressible
4. Is independent of pressure and viscosity

View answer

243. The bulk modulus of elasticity with increase in pressure

1. Increases
2. Decreases
3. Remain constant
4. Increases first up to certain limit and then decreases

View answer

244. The buoyancy depends on

1. Mass of liquid displaced
2. Viscosity of the liquid
3. Pressure of the liquid displaced
4. Depth of immersion

View answer

245. The buoyancy depends upon the

1. Weight of the liquid displaced
2. Pressure with which the liquid is displaced
3. Viscosity of the liquid
4. Compressibility of the liquid

View answer

246. The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is approximately

1. 5 mm
2. 10 mm
3. 20 mm
4. 30 mm

View answer

247. The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid)

1. K.ρ
2. K/ρ
3. ρK
4. None of these

View answer

248. The center of gravity of the volume of the liquid displaced by an immersed body is called

1. Metacentre
2. Center of pressure
3. Center of buoyancy
4. Center of gravity

View answer

249. The center of pressure of a surface subjected to fluid pressure is the point

1. On the surface at which resultant pressure acts
2. On the surface at which gravitational force acts
3. At which all hydraulic forces meet
4. Similar to metacentre

View answer

250. The centre of gravity of the volume of the liquid displaced by an immersed body is called

1. Centre of gravity
2. Centre of pressure
3. Metacentre
4. Centre of buoyancy

View answer