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Dhaka WASA Supply & Sewerage Authority (DWASA) || Assistant Engineer (02-03-2024) || 2024
All Question
25 kN/m2
245 kN/m2
2500 kN/m2
2.5kN/m2
increase in viscosity of gas
increase in viscosity of liquid
decrease in viscosity of gas
decrease in viscosity of liquid
pressure
distance
flow
density
gravitational pull exerted by the earth
forces experienced by body in atmosphere
force of attraction experienced by particles
gravitational force of attraction towards the center of the earth.
body centred cubic
face centred cubic
hexagonal close packed
cubic structure
ferrite
pearlite
anstenite
ferrite and cementite
9 times
1/9 times
1/3 times
3 times
the center of gravity of the body and the meta center
the center of gravity of the body and the center of buoyancy
the center of gravity of the body and the center of pressure
center of buoyancy and metacenter.
atmospheric pressure
surface tension
force of adhesion
force of cohesion
maximum at noon
minimum at noon
maximum at midnight
same throughout the day
maximum flow only
minimum flow only
average flow only
maximum and minimum flow
odour
colour
bacterias
hardness
helps growth of bacterias
impedes growth of algae
increases dissolved oxygen content
reduces turbidity.
calcium sulphate
magnesium sulphate
calcium nitrate
calcium bicarbonate
Clay
Sand
Silt
Coarse gravel
The sewage when running full from inside, is called internal pressure
The internal pressure if any, causes tensile stress in the pipe material
Pressure sewers are designed to be safe in tension
All the above
Centrifugal pump
Pneumatic ejector
Reciprocating pump
None of these
Mean radius of sewer
Difference in heads between two points in circular pipes
Mean of radii in a pipe line of varying cross-sections
Cross-sectional area/wetted perimeter
Decreasing the lever arm
Increasing the total perimeter of bars
Replacing larger bars by greater number of small bars
Replacing smaller bars by greater number of greater bars
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