**201. Rotameter is a device used to measure____________________?**

A. absolute pressure

B. velocity of fluid**C. flow**

D. rotation

E. velocity of air

**202. Flow of water in a pipe about 3 meters in diameter can be measured by_________________?**

A. orifice plate

B. venturi

C. rotameter**D. pitot tube**

E. nozzle

**203. True one-dimensional flow occurs when___________________?****A. the direction and magnitude of the velocity at all points are identical**

B. the velocity of successive fluid par-ticles, 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

**204. In the case of steady flow of a fluid, the acceleration of any fluid particle is__________________?**

A. constant

B. variable**C. zero**

D. zero under limiting conditions

E. never zero

**205. During the opening of a valve in a pipe line, the flow is___________________?**

A. steady**B. unsteady**

C. uniform

D. laminar

E. free vortex type

**206. Gradually varied flow is____________________?**

A. steady uniform

B. non-steady non-uniform

C. non-steady uniform**D. steady non-uniform**

E. true one-dimensional

**207. Non uniform flow occurs when ____________________?**

A. the direction and magnitude of the velocity at all points are identical

B. the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time

C. the magnitude aricf 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**

**208. An ideal flow of any fluid must satisfy ___________________?**

A. Pascal law

B. Newton’s law of viscosity

C. boundary layer theory**D. continuity equation**

E. Bernoulli’s theorem