58,

59,

60,

61,

62,

68,

64,

68,

66.

Mention the last stage in sludge treatment process :
(^) thickening (B) dewatering
(ಲ) drying (D) digestion

The organic loading in an activated sludge plant is defined as :
(A) Volume of aeration tank/Mass of BOD per day
(B) Mass of BOD per day/Volume of the aeration tank
(C) Aeration period x Volume of aeration tank
(D) The mass of BOD per day/Volume of secondary clarifier

The Air (Prevention and Control of Pollution) Act was enacted in the year :

(^) 1991 ൫) 2000
(0 1974 യ) 1981
The maximum area of tension reinforcement in concrete beams shall not exceed :
മ) 0.15% ற 2%
(ಲ) 1% നയ) 15%
Cantilever retaining walls can safely be used for a height not more than :
வ க (B) 5m
(¢ 6m D) 8m

Prestressloss due to friction oceurs:
(A) Only in post-tensioned beams
(B) Only in pre-tensioned beams
)© Inboth post-tensioned and pre-tensioned beams
(D) None of above

To ensure uniform pressure distribution, the thickness of the foundation, is :
(A) Kept uniform throughout
(B) Increased gradually towards the edge
(C) Decreased gradually towards the edge
(D) Kept zero at the edge

The minimum clear cover for R.C.C. columns shall be :
(ಯ) Greater of 40 mm or diameter of bars
(B) Smaller of 40 mm or diameter of bars
(C) Greater of 25 mm or diameter of bars
(D) Smaller of 25 mm or diameter of bars

In a simply supported slab, alternate bars are curtailed at :
(ಯ) 1/4 of the span (B) 1/5% of the span
(ಲ) 1/7th of the span (D) 1/6 of the span

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