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The specific retention is least in case of
ক
Clay
খ
Sand
গ
Silt
ঘ
Coarse gravel.
Minimum spacing between horizontal parallel reinforcement of the same size should not be less than
ক
One diameter
খ
2.5 diameters
গ
3 diameters
ঘ
3.5 diameters
An R.C.C. column is treated as short column if its slenderness ratio is less than
ক
30
খ
35
গ
40
ঘ
50
The load stress of a section can be reduced by
ক
Decreasing the lever arm
খ
Increasing the total perimeter of bars
গ
Replacing larger bars by greater number of small bars
ঘ
Replacing smaller bars by greater number of greater bars
The devices which are installed for drawing water from the sources are called
ক
Aquifers
খ
Aquiclude
গ
Filters
ঘ
Intakes
The correct relation between theoretical oxygen demand (TOD), Biochemical oxygen demand (BOD) and Chemical oxygen demand (COD) is given by
ক
TOD > BOD > COD
খ
TOD > COD > BOD
গ
BOD > COD > TOD
ঘ
COD > BOD > TOD
The polluted water is one which
ক
Contains pathogenic bacteria
খ
Consists of undesirable substances rendering it unfit for drinking and domestic use
গ
Is safe and suitable for drinking and domestic use
ঘ
Is contaminated
Dissolved oxygen in streams is
ক
Maximum at noon
খ
Minimum at noon
গ
Maximum at midnight
ঘ
Same throughout the day
Sewerage system is designed for
ক
Maximum flow only
খ
Minimum flow only
গ
Average flow only
ঘ
Maximum and minimum flow
Metacentric height is given as the distance between
ক
the center of gravity of the body andthe meta center
খ
the center of gravity of the body and the center of buoyancy
গ
the center of gravity of the body and the center of pressure
ঘ
center of buoyancy and metacentre
By boiling water, hardness can be removed if it is due to
ক
calcium sulphate
খ
magnesium sulphate
গ
calcium nitrate
ঘ
calcium bicarbonate
Aeration of water is done to remove
ক
odour
খ
colour
গ
bacterias
ঘ
hardness
Sunlight
ক
helps growth of bacterias
খ
impedes growth of algae
গ
increases dissolved oxygen content
ঘ
reduces turbidity
The self-weight of the footing, is
ক
Not considered for calculating the upward pressure on footing
খ
Also considered for calculating the upward pressure on footing
গ
Not considered for calculating the area of the footing
ঘ
Both (B) and (C)
Side face reinforcement shall be provided in the beam when depth of the web in a beam exceeds
ক
50 cm
খ
75 cm
গ
100 cm
ঘ
120 cm
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