In a sludge tank, the gas mainly produced, is_________________?
In a sludge tank, the gas mainly produced, is_________________?
A. Oxygen
B. Nitrogen
C. Hydrogen
D. Carbon dioxide
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For drainage pipes in buildings the test applied before putting them to use, is__________________?
For drainage pipes in buildings the test applied before putting them to use, is__________________?A. Water test
B. Smoke test
C. Straightness test
D. All the aboveThe two important forces for a floating body are___________________?
The two important forces for a floating body are___________________?A. buoyancy, gravity
B. buoyancy, pressure
C. buoyancy, inertial
D. inertial, gravity
E. gravity, pressureLead caulked joints are used for laying____________________?
Lead caulked joints are used for laying____________________?A. Stone ware pipes
B. Earthenware pipes
C. C.I. pipes
D. G.I. pipesThe recommended detention period for grit chambers is_______________?
The recommended detention period for grit chambers is_______________?A. 1 minute
B. 2 minutes
C. 3 minutes
D. 5 minutesTwo dimensional flow occurs when___________________?
Two 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 suc-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 plane
E. velocity, depth, pressure, etc. change from point to point in the fluid flowDepletion of ozone layer in the outer atmosphere may cause___________________ ?
Depletion of ozone layer in the outer atmosphere may cause___________________ ?A. Lung cancer
B. Skin cancer
C. Bronchitis
D. Heart disorder