183. The discharge through an internal mouth piece is more if its length is

A. greater than static pressure

B. equal to static pressure

C. lesser than static pressure

D. none of these,

184. The intensity of pressure due to sudden closure of a valve of a pipe in which water flows with velocity v, is directly proportional to :

A. square root of the bulk modulus of elasticity of water

B. bulk modulus of elasticity of water

C. specific weight of water

D. none of these.

185. The horizontal component of the force on a curved surface is equal to

A. weight of liquid vertically below the curved surface

B. force on a vetical projection of the curved surface

C. product of pressure at its centroid and the area

D. weight of liquid retained by the curved area.

186. In order to avoid capillary correction, the minimum diameter of a manometer used for measuring pressure, should be

A. 2 mm

B. 4 mm

C. 6 mm

D. 8 mm

187. A spherical load 900 kg is rolled through 9.8 m across the deck of a ship weighing 10,000 kg. If the metacentric height of the ship is 5 metres, the angle of heel, is

A. 100 5'

B. 100 10'

C. 100 15'

D. 100 20'.

188. The radius of gyration of the water line of a floating ship is 4 m and its metacentric height is 72.5 cm. The period of oscillation of the ship, is

A. It

B. 2n

C. 3n

D. 4n

189. Water displaced by a floating wooden block of density 0.75, 5 m long, 2 m wide and 3 m high, is

A. 17.5 m

B. 20.0 m3

C. 22.5 m3

D. 25 km3.

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