Q.1
A rain sanitary sewer is constructed to carry
Q.2
The pressure exerted by
Q.3
Pick up the incorrect statement from the following for allowing workers to enter sewers
Q.4
For design purposes, the normal rate of infiltration of ground water into the sewer, is
Q.5
If the peak discharge of a storm water drain (S.W. Drain) is expected to exceed 150 cumecs, the free board to be provided, is
Q.6
If q is the average sewage flow from a city of population P, the maximum sewage flow
Q.7
Fresh sewage may become stale in
Q.8
The grit and silt of the grit chambers, may not be used for
Q.9
In 1000 kg of sewage, the total solids approximate
Q.10
Pick up the incorrect statement from the following:
Q.11
Pick up the correct statement from the following:
Q.12
When drainage to sewage ratio is 20, the peak dry weather flow is
Q.13
The sewerage system consists of
Q.14
The gradient of sewers depends upon
Q.15
The laying of sewers is done with
Q.16
Pick up the correct statement from the following:
Q.17
A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of
Q.18
Pick up the correct statement from the following:
Q.19
The sewer which received discharge from two or more main sewers, is known as
Q.20
Imhoff cone is used to measure
Q.21
The normal values of over flow rates for secondary sedimentation tanks, ranges between
Q.22
The asbestos cement sewers are
Q.23
The normal value of over flow rates for plain primary sedimentation tanks, ranges between
Q.24
If D is the diameter of a circular sewer and D’ is the top horizontal diameter of an equivalent egg shaped section, the relationship which holds good, is
Q.25
hydraulically equivalent, the relationship which holds good, is
Q.26
For design of sewers, percentage of sewage discharge is assumed
Q.27
Nitrogen cycle of sewage, is
Q.28
depends upon The Chezy’s constant C in the formula V = C
Q.29
The detention period for plain sedimentation water tanks, is usually
Q.30
The minimum recommended diameter of sewers, is
Q.31
Boussinesq’s equation for ascertaining unit pressure at a depth on sewers due to traffic loads, is
Q.32
Traps
Q.33
In sewage having fully oxidised organic matter, the nitrogen exists in the form of
Q.34
In sewers the highest non-scouring velocity is achieved in
Q.35
If the pH value of sewage is 7
Q.36
Which one of the following tests is used for testing sewer pipes?
Q.37
Pick up the correct statement from the following:
Q.38
Pick up the incorrect statement from the following:
Q.39
In septic tanks, decomposition of organic bacteria, is done by
Q.40
Pick up the correct statement from the following:
Q.41
Pick up the incorrect statement from the following:
Q.42
Lead acetate test in sewer manhole is done to test the presence of
Q.43
The sewers
Q.44
The normal values of over flow rates for sedimentation tanks using coagulant, ranges between
Q.45
Aerobic activity is maximum
Q.46
During preliminary treatment of a sewage
Q.47
The angle subtended by the surface of sewer water with partial flow, at sewer centre is 120°, the depth of sewerage is
Q.48
Primary treatment of sewage consists of removal of
Q.49
For efficient working of a sewer, it must be ensured that
Q.50
If the over land flow from the critical point to the drain is 8 km and the difference in level is 12.4 m, the inlet time is
0 h : 0 m : 1 s