**181. The velocity of jet of water travelling out of opening in a tank filled with water is proportional to___________________?**

A. head of water (h)

B. h2**C. V/T**

D. h2

E. h3/1.

**182. In a free vortex motion, the radial component of velocity everywhere is ________________?**

A. maximum

B. minimum**C. zero**

D. non-zero and finite

E. unpredictable

**183. A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is__________________?**

A. 0.83**B. 0.6**

C. 0.4

D. 0.3

E. none of the above

**184. The region between the separation streamline and the boundary surface of the solid body is known as_________________?****A. wake**

B. drag

C. lift

D. boundary layer

E. aerofoil section

**185. The upper surface of a weir over which water flows is known is________________?**

A. crest

B. nappe**C. sill**

D. weir top

E. contracta

**186. Uniform flow occurs when___________________?**

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

B. the velocity of successive fluid pai-ticles, at any point, is the same at sucĀ¬cessive 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 plsr.e

E. velocity, depth, pressure, etc. change from point to point in the fluid flow

**187. Hydrometer is used to determine________________?****A. specific gravity of liquids**

B. specific gravity of solids

C. specific gravity of gases

D. relative humidity

E. density

**188. For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal__________________?**

A. ratio of inertial force to force due to viscosity

B. ratio of inertial force to force due to gravitation

C. ratio of inertial force to force due to surface tension**D. all the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity**

**189. A streamline is defined as the line ________________?**

A. parallel to central axis flow

B. parallel to outer surface of pipe**C. of equal velocity in a flow**

D. along which the pressure drop is uniform

E. which occurs in all flows

**190. A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury ?**

A. 0.5

B. 0.4**C. 0.515**

D. 0.5