Waste Water Engineering

A. A jar
B. A breaker
C. A test tube
D. An Imhoff cone

A. 65 to 70%
B. 70 to 75%
C. 75 to 80%
D. 85%

A. Lower end of ventilating column
B. Upper end of ventilating column
C. Upper end of the manhole
D. First step in manhole

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

A. Comminutor
B. Shredder
C. Both A. and B.
D. Neither A. nor B.

A. Potassium permanganate
B. Sulphuric acid and napthamine
C. Phenol-di -sulphuric acid and potassium hydroxide
D. None of these

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

A. Highly resistant to sulphide corrosion
B. Highly impervious
C. Hydraulically efficient because of their smooth interior surface
D. Especially suited to pressure pipes

A. 1.095
B. 1.085
C. 1.075
D. 1.065

A. Without entry ladders
B. Without manhole covers
C. With depths more than 3.5 m
D. Having drains at different levels