Engineering :: Fluid Mechanics and Hydraulic Machines

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301.

Layered or bedded rocks having planes of reltively easy separation are called

302.

Chemically inact relatively unstable blocks, large or small with three or more sets of joints and seams are known as

303.

Micaceous rocks with closely spaced cleavage planes along which easy separation can be affected, are known as

304.

Which conduit entrance is expected to have least loss coeffieient?

A.	Inward projecting entrances	B.	Square bell mouth entrances
C.	Circular bell mouth entrances	D.	Slightly rounded entrance
E.	Square cornered entrance

305.

Which conduit entrance is expected to have highest loss coefficient?

A.	Inward projecting entrances	B.	Fully rounded entrance having x/D>0.15
C.	Gate in thin wall-unsuppressed contraction	D.	Gate in thin wall-bottom and side suppressed
E.	Gate in thin wall-corners rounded

306.

Permissible velocity of water flowing through concrete tunnel is usually

307.

Presence of air in a pressure tunnel may result in

308.

Formation of air pockets in pressure tunnel may be avoided by

A.	Avoiding partial gate opening	B.	Avoiding traps or pockets along the crown
C.	Avoiding vortices formation	D.	Avoiding small intakes
E.	Any of the above

309.

Which rock is expected to have highest strength grade?

310.

The advantages of burried penstocks is

A.	Less accessible in inspection	B.	Tendency to slide along steep slopes
C.	Location difficult	D.	No expansion joints needed
E.	Need for special coating against the corrosive action of salts present in soil