An ideal fluid is_______________?

A. one which obeys Newton’s law of viscosity
B. frictionless and incompressible
C. very viscous
D. frictionless and compressible

Centre of buoyancy always_________________?

A. coincides with the centre of gravity
B. coincides with the centroid of the volume of fluid displaced
C. remains above the centre of gravity
D. remains below the centre of gravity

In lime-soda process________________?

A. only carbonate hardness is removed
B. only non-carbonate hardness is re-moved
C. lime reduces the carbonate hardness and soda-ash removes the non-carbo¬nate hardness
D. lime reduces the non-carbonate hard-ness and soda-ash removes the carbo¬nate hardness

Sludge volume index is defined as the ratio of_______________?

A. percentage of sludge by volume to percentage of suspended solids by weight
B. percentage of sludge by volume to percentage of total solids by weight
C. percentage of suspended solids by weight to percentage of sludge by volume
D. percentage of total solids by weight to percentage of sludge by volume

Scour valves are provided ______________?

A. at street corners to control the flow of water
B. at every depression and dead ends to drain out the waste water that may collect there
C. at the foot of rising main along the slope to prevent back running of water
D. at every summit of rising mains

Engineering ethics refers to_______________?

A. The rules and standards given by an institution for Engineering practice
B. The rules and regulation relating to obligations and rights of others
C. The professional regulation
D. The rules and standards which govern the conduct of Engineers as professional Engineers