-
০০। 135 litres of water per person per day, is provided in
- ক) nurses homes
- খ) hostels
- গ) residential schools
- ঘ) all the above.
-
০১। 45 litres of water per person per day, is provided in
- ক) office buildings
- খ) hotels
- গ) hostels
- ঘ) nurse‘s homes.
-
০২। A centrifugal pump is required to be primed before starting if it is located
- ক) at higher level than water level of reservoir
- খ) at lower level than water level of reservoir
- গ) both (a) and (b)
- ঘ) neither (a) nor (b).
-
০৩। A circular gravity aqueduct is not generally preferred to because of
- ক) its maximum hydraulic mean depth
- খ) maximum area per unit of wetted perimeter
- গ) minimum cost of construction
- ঘ) its proper support on the ground.
-
০৪। A city supply includes
- ক) domestic water demand
- খ) industrial and commercial water demands
- গ) demand for public uses and fire
- ঘ) water losses
- ঙ) all the above.
-
০৫। A high velocity of wash water is required for
- ক) rapid gravity filter with strainers
- খ) rapid gravity filter without strainers
- গ) slow sand filter with strainers
- ঘ) slow sand filter without strainers
- ঙ) none of these.
-
০৬। A pressure conduit carrying water beneath a stream or a canal, is known as
- ক) sag
- খ) depressed pipe
- গ) inverted syphon
- ঘ) all the above.
-
০৭। A pressure conduit laid under ground, may not be subjected to
- ক) internal pressure of water
- খ) pressure due to external load
- গ) longitudinal temperature stress
- ঘ) longitudinal stresses due to unbalanced pressure to bends
- ঙ) none of these.
-
০৮। A slow sand filter is cleaned if its filter head is higher than
- ক) 10 cm to 20 cm
- খ) 20 cm to 40 cm
- গ) 40 cm to 70 cm
- ঘ) 70 cm to 120 cm
- ঙ) 120 cm to 150 cm.
-
০৯। A strainer type well sunk through three pervious layers intervened by three impervious aquicludes, draws water from
- ক) top most pervious layer
- খ) central pervious layer
- গ) lowest pervious layer
- ঘ) all the pervious layers.
-
১০। A water channel supported above the ground over trestles, is generally called
- ক) flume
- খ) canal
- গ) adueduct
- ঘ) tunnel
- ঙ) all the above.
-
১১। A well is considered to be good if it is sunk into
- ক) Clay
- খ) Sand
- গ) Coarse gravel
- ঘ) Silt.
-
১২। Abyssinian tube well is a special type of
- ক) slotted type wells
- খ) cavity type wells
- গ) strainer type well
- ঘ) none of these.
-
১৩। According to Buston‘s formula, fire demand in litres per minute for a population of P thousands, is
- ক) 3182 P
- খ)
- গ) 4637 P (1 - 0.01 P )
- ঘ) 5663 P
- ঙ) none of these.
-
১৪। According to Godrich the ratio of peak demand rate to mean demand is
- ক)
- খ)
- গ)
- ঘ)
- ঙ) All the above.
-
১৫। According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for
- ক) Boarding schools
- খ) Nurses home and medical quarters
- গ) hostels
- ঘ) all the above.
-
১৬। According to Kuichling‘s formula, fire demand in litres per minute for a population of P thousands, is
- ক) 3182 P
- খ)
- গ) 4637 P [1 - 0.01 P ]
- ঘ) 5663 P .
-
১৭। Acidity in water is caused due to
- ক) Mineral acids
- খ) Free CO2
- গ) Iron sulphate
- ঘ) Aluminium sulphate
- ঙ) All the above.
-
১৮। Aeration of water is done to remove
- ক) odour
- খ) colour
- গ) bacterias
- ঘ) hardness
- ঙ) turbidity.
-
১৯। After cleaning a slow sand filter, the filtered water is not used for
- ক) 6 hours to 12 hours
- খ) 12 hours to 18 hours
- গ) 18 hours to 24 hours
- ঘ) 24 hours to 36 hours
- ঙ) 48 hours.