A. Highly resistant to sulphide corrosion
B. Highly impervious
C. Hydraulically efficient because of their smooth interior surface
D. Especially suited to pressure pipes
Related Mcqs:
- The stone ware sewers_________________?
A. Are used for carrying sewage and drainage from houses
B. Are manufactured from clays and shale
C. After casting are dried and burnt at temperature 150°C, 700°C and 1200°C
D. All the above - Pick up the incorrect size of stone ware sewers_________________?
A. 52.5 cm
B. 67.5 cm
C. 82.5 cm
D. None of these - 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 above - Hume steel pipes are__________________?
A. Steel pipes
B. Steel shell coated from inside with cement mortar
C. Steel shell coated from outside with cement mortar
D. Both B. and C. - The porosity of sediments in sewer pipes, is usually taken as___________________?
A. 0.010
B. 0.011
C. 0.012
D. 0.013 - In R.C. sewer pipes, the percentage longitudinal reinforcement to the cross-sectional area of concrete is kept________________?
A. 10.0
B. 5.0
C. 2.0
D. 0.25 - Sewer pipes need be checked for_________________?
A. Minimum flow
B. Maximum flow
C. Both A. and B.
D. None of these - Which one of the following tests is used for testing sewer pipes ?
A. Water test
B. Ball test
C. Mirror test
D. All of these - You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at___________________?
A. Full depth
B. Half full
C. Two third full
D. Three fourth full - Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for__________________?
A. Unexpected large scale infiltration of stream water
B. Unexpected increase in the population
C. Under estimates of maximum and average flows
D. All of the above
