731. The property of fluid by virtue of which it offers resistance to shear is called____________________?
A. surface tension
B. adhesion
C. cohesion
D. viscosity
✅ The correct answer is option D.
Civil Engineering
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732. In septic tanks__________________?
A. Free board of 0.3 m may be provided
B. The baffles or tees are extended up to top level of scum
C. The clear space between the baffle top and covering slab is about 7.5 cm
D. All the above
✅ The correct answer is option D.
733. 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
✅ The correct answer is option D.
734. In a grit chamber of a sewage treatment plant ____________________?
A. Flow velocity 0.15 m to 0.3 m/sec is kept
B. Depth of 0.9 m to 1.20 m is kept
C. One minute of detention period is kept
D. All the above
✅ The correct answer is option D.
735. When a body floating in a liquid, is displaced slightly, it oscillates about ___________________?
A. e.g. of body
B. center of pressure
C. center of buoyancy
D. metacentre
✅ The correct answer is option D.
736. The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be____________________?
A. 500 kg
B. 1000 kg
C. 1500 kg
D. 2000 kg
✅ The correct answer is option D.
737. Euler’s dimensionless number relates the following_______________?
A. inertial force and gravity
B. viscous force and inertial force
C. viscous force and buoyancy force
D. pressure force and inertial force
✅ The correct answer is option D.
738. The Chezy’s constant C in the formula V = C_________________?
A. Size of the sewer
B. Shape of the sewer
C. Roughness of sewer surface
D. All the above
✅ The correct answer is option D.
739. The standard B.O.D. of water is taken for_________________?
A. 1 day
B. 2 days
C. 3 days
D. 5 days
✅ The correct answer is option D.
740. Inter-distance between ventilation columns in a sewer line is kept__________________?
A. 25 to 50 m
B. 50 m to 100 m
C. 100 m to 150 m
D. 150 m to 300 m
✅ The correct answer is option D.