If is the diameter of upper circular portion, the overall depth of New Egg shaped sewer section, Is_____________________?
A. 1.250 D
B. 1.350 D
C. 1.425 D
D. 1.625 D
Waste Water Engineering
For evaporation and measurement of settable solids, the apparatus used, is________________?
For evaporation and measurement of settable solids, the apparatus used, is________________?
A. A jar
B. A breaker
C. A test tube
D. An Imhoff cone
For design of sewers, percentage of sewage discharge is assumed_____________________?
For design of sewers, percentage of sewage discharge is assumed_____________________?
A. 65 to 70%
B. 70 to 75%
C. 75 to 80%
D. 85%
‘Cowl’ is provided at___________________?
‘Cowl’ is provided at___________________?
A. Lower end of ventilating column
B. Upper end of ventilating column
C. Upper end of the manhole
D. First step in manhole
A drop manhole is provided if__________________?
A drop manhole is provided if__________________?
A. A sewer drops from a height
B. A branch sewer joins the main sewer at higher level
C. A lamp is inserted to check obstruction
D. None of these
The use of coarse screens for the disposal of sewage, may be dispensed with by______________?
The use of coarse screens for the disposal of sewage, may be dispensed with by______________?
A. Comminutor
B. Shredder
C. Both A. and B.
D. Neither A. nor B.
For detecting the nitrates in sewage, the colour may be developed by adding________________?
For detecting the nitrates in sewage, the colour may be developed by adding________________?
A. Potassium permanganate
B. Sulphuric acid and napthamine
C. Phenol-di -sulphuric acid and potassium hydroxide
D. None of these
In septic tanks__________________?
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
Stone ware pipes are_______________?
Stone ware pipes are_______________?
A. Highly resistant to sulphide corrosion
B. Highly impervious
C. Hydraulically efficient because of their smooth interior surface
D. Especially suited to pressure pipes
The ratio of the diameter of a circular section and the side of a square section hydraulically equivalent, is____________________?
The ratio of the diameter of a circular section and the side of a square section hydraulically equivalent, is____________________?
A. 1.095
B. 1.085
C. 1.075
D. 1.065