Fluid Mechanics

181. The units of kinematic viscosity are

1. metres2 per sec
2. kg sec/metre
3. newton-sec per metre
4. newton-sec per metre
5. none of the above.

View answer

182. The units of viscosity are

1. metres2 per sec
2. kg sec/metre
3. newton-sec per metre2
4. newton-sec per meter
5. none of the above.

View answer

183. The upper surface of a weir over which water flows is known is

1. crest
2. nappe
3. sill
4. weir top
5. contracta.

View answer

184. The value of mass density in kgsecVm4 for water at 0°C is

1. 1
2. 1000
3. 100
4. 101.9
5. 91

View answer

185. The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to

1. 1000
2. 2100
3. 2700
4. 10000
5. 21000

View answer

186. The vapour pressure over the concave surface is

1. less man the vapour pressure over the plane surface
2. equal to the vapour pressure over the plane surface
3. greater than the vapour pressure over the plane surface
4. zero
5. none of the above.

View answer

187. The velocity of jet of water travelling out of opening in a tank filled with water is proportional to

1. head of water (h)
2. h2
3. V/T
4. h2
5. h3/1.

View answer

188. The volumetric change of the fluid caused by a resistance is known as

1. volumetric strain
2. volumetric index
3. compressibility
4. adhesion
5. cohesion.

View answer

189. To avoid an interruption in the flow of a syphon, an air vessel is provided

1. at the inlet
2. at the outlet
3. at the summit
4. ay nay point between inlet and outlet
5. none of the above.

View answer

190. To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than

1. 2.4 m above the hydraulic gradient
2. 6.4 m above the hydraulic gradient
3. 10.0 m above the hydraulic gradient
4. 5.0 above the hydraulic gradient
5. none of the above.

View answer