A manhole is classified as shallow if its depth is between_________________?
(A) 0.4 to 0.5 m
(B) 0.5 to 0.7 m
(C) 0.7 to 0.9 m
(D) 0.9 to 1.20 m
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
The most efficient cross section of sewers in a separate sewerage system is__________________?
(A) Parabolic
(B) Circular
(C) Rectangular
(D) New egged
For trunk and out-fall, the type of sewers generally used, is_____________________?
(A) Standard egg shaped
(B) Circular shaped
(C) Horse shoe shaped
(D) Parabolic shaped
Pick up the correct statement from the following _________________?
(A) The materials separated by screens, is called screenings
(B) The screenings are disposed off either by burning or by burial or by dumping
(C) The process of burning the screenings, is known as compositing
(D) All the above
An inverted siphon is designed generally for____________________?
(A) One pipe
(B) Two pipes
(C) Three pipes
(D) Four pipes
Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter______________________?
(A) Less than 0.01 mm
(B) Less than 0.05 mm
(C) Less than 0.1 mm
(D) Greater than 0.1 mm
In sewers designed with self cleansing velocity________________?
(A) The bottom is silted
(B) The bottom is scoured
(C) Both silting and scouring occur at the bottom
(D) Neither silting nor scouring occurs at the bottom
The spacing of bars of perforations of fine screens used for the treatment of sewage, is_______________?
(A) 2 to 3 mm
(B) 3 to 5 mm
(C) 5 to 8 mm
(D) 8 to 10 mm