161. The total energy of each particle at various places in the case of perfect incompressible fluid flowing in continuous stream________________?
D. keeps on increasing
B. keeps on decreasing
C. remains constant
D. may increase/decrease
E. unpredictable

162. Pitot tube is used for measurement of__________________?
A. pressure
B. flow
C. velocity
D. discharge
E. viscosity

163. Normal depth in open channel flow is the depth of flow corresponding to_______________?
A. steady flow
B. unsteady flow
C. laminar flow
D. uniform flow
E. critical flow

164. For hypersonic flow, the Mach number is___________________?
A. unity
B. greater than unity
C. greater than 2
D. greater than 4
E. greater than 10

165. Two dimensional flow occurs when___________________?
A. the direction and magnitude of the velocity at all points are identical
B. the velocity of successive fluid particles, at any point, is the same at successive periods of time
C. the magnitude and direction of the velocity do not change from point to point in the fluid
D. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
E. velocity, depth, pressure, etc. change from point to point in the fluid flow

166. All the terms of energy in Bernoulli’s equation have dimension of_______________?
A. energy
B. work
C. mass
D. length
E. time

167. The fluid forces considered in the Navier Stokes equation are__________________?
A. gravity, pressure and viscous
B. gravity, pressure and turbulent
C. pressure, viscous and turbulent
D. gravity, viscous and turbulent
E. none of the above

168. For pipes, laminar flow occurs when Roynolds number is__________________?
A. less than 2000
B. between 2000 and 4000
C. more than 4000
D. less than 4000
E. none of the above

169. Cavitation is caused by___________________?
A. high velocity
B. high pressure
C. weak material
D. low pressure
E. low viscosity

170. Bernoulli equation deals with the law of conservation of____________________?
A. mass
B. momentum
C. energy
D. work
E. force