60.

61.

62.

68.

During sludge digestion :
(A) Acidity condition should prevail (B) Alkaline condition should prevail
(C) Acidity or alkaline condition (D) Neutral condition should prevail

The disposal method in which solid waste is heated in an oxygen free atmosphere and
reduced to gaseous, liquid and solid fractions :

(¢) Pyrolysis (B) Pulverisation
(C) Incineration (D) Composting

The best system of plumbing of drainage work in building is :
(ಹ) One pipe system
(8) Two pipe system
(C) Single stack system
(D) Partially ventilated single stack system

Water content of soil is 0.15, Degree of saturation 70%, void ratio is 0.61, then specific gravity
18:

4) 2.85 © 8
)© 2.50 0 212

64. The numerical difference between liquid limit and plastic limit is :
(8) Liquidity index (3) Plasticity index
(C) Consistency index (D) Flow index
65. The intensity of vertical stress at depth z below a concentrated load Q, by Boussinesq
equation is :
൭ കടഞ്ഞ @) =, = 0.475 ९
2
(0 കുട 04775. (2) ‏يه‎ - 0.5775 ©
2
66. The volumetric strain per unit increase in effective stress of soil is defined as :
(ക) Compression index (B) Volume compressibility
(€) Coefficient of compressibility (D) Consolidation
67. Failure of a finite slope along a surface that intersects the slope above the toe :
(ക) Compound failure (B) Base failure
(©) Slope failure (D) Toe failure
143/2015 10 A