Question76:-Chlorine usage in the treatment of 20,000 ‘m*3* of water is 8 kg in a day. Residual chlorine after 10 minutes
contact tune is 0.2 mg/L. The chlorine demand is

A:-0.4 mg/L
.2 mg/L
C:-0.3 mg/L
D:-0.6 mg/L
Correct Answer:- Option-B
Question77:-Peak drainage discharge is obtained when the duration of a rainfall is equal to
A:-Inlet flow time
B:-Gutter flow time

C:-Channel flow time
D:-Time of concentration
Correct Answer:- Option-D
Question78:-The ratio of peak sewage flow to average flow is
Av1.8
B:

5

-3

D:-2

Correct Answer:- Option-C

Question79:-If the runoff from a catchment is 800 *m*3°* and the precipitation volume is 3200 ‘m*(3)° then the impervious
factor for the catchment is

4-4

. 25
C:-0.5
D:-0.4
Correct Answer:- Option-B
Question80:-The sensitiveness of spirit level if the bubble moves through 4 mm for a change of inclination of 40 seconds is

D:-0.1 mm
Correct Answer:- Option-D

Question81:-For a uniformly graded soil, coefficient of curvature is
A:-Zero

:-4
D:-1
Correct Answer:- Option-D

Question82:-A body is acted upon by a set of mutually perpendicular shear stresses, the diagonal planes are likely to have
A:-Tension and compression
B:-Tension only
C:-Compression only
D:-Shear only
Correct Answer:- Option-A

Question83:-In an elastic material the stress strain relation is always

-Linear

:-Non-linear
C:-Linear or non-linear
D:-Parabolic
Correct Answer:- Option-C

Question84:-A cylindrical shell is 3 m long and is having 1 m internal diameter and 15 mm thickness. If it is subjected to an

internal fluid pressure of 1.5 N/‘“mm*2* then hoop stress is
A:-25 N/'mm*2*

8:-50 ॥/ 11727

(:-100 ॥/ 1727

0:-125 ॥/ 11727
Correct Answer:- Option-B

Question85:-Factor of safety for steel is generally taken as
‏3ھ‎
‎8:-1.5