০০। A control meter is preferred to a weir because
ক) it measures the discharge even in silt laiden streams
খ) the velocity of approach of the channel increases above the control, and thus removes the silt completely
গ) it is not damaged by floating debris
ঘ) all the above.
০১। A hydraulic jump in a control meter will be formed above the control, if its original
ক) depth is more than critical depth
খ) depth is less than the critical depth
গ) depth is equal to critical depth
ঘ) none of these.
০২। A recording type rain gauge
ক) produces a mass curve of rain fall
খ) records the cumulative rain
গ) is sometimes called integrating rain gauge or continuous rain gauge
ঘ) all the above.
০৩। A river is said to be of uniform section if in its section
ক) a segment of a circle can be fitted
খ) a parabolic section can be fitted
গ) a rectangular section can be fitted
ঘ) a trapezoidal section can be fitted
ঙ) all the above.
০৪। A soil strata may consist of
ক) soil zone
খ) intermediate zone
গ) capillary zone
ঘ) ground water zone
ঙ) all the above.
০৫। A unit hydrograph is a hydrograph of a rain storm of a specified duration resulting from a run-off of
ক) 15 mm
খ) 20 mm
গ) 25 mm
ঘ) 30 mm.
০৬। A volume of air at constant barometric pressure may be brought to dew point by
ক) increasing the temperature
খ) decreasing the temperature
গ) neither (a) nor (b)
ঘ) both (a) and (b).
০৭। A well is sunk in an unconfined aquifer having a saturated depth of 100 m. Assuming the equilibrium flow conditions and a homogeneous aquifer and radius of influence to be same, the ratio of discharges at 20 m and 40 m draw downs, is
ক) 2/3
খ) 5/4
গ) 4/5
ঘ) 7/8
ঙ) 8/7
০৮। A well penetrates to 30 m below the static water table. After 24 hours of pumping at 31.40 litres/minute, the water level in a test well at a distance of 80 m is lowered by 0.5 m and in a well 20 m away water is lowered by 1.0 m. The transmissibility of the auifer, is
ক) 1.185 m2/minute
খ) 1.285 m2/minute
গ) 1.385 m2/minute
ঘ) 1.485 m2/minute
ঙ) 1.585 m2/minute.
০৯। Absolute humidity in air
ক) decreases at higher altitudes
খ) increases at higher altitudes
গ) remains constant at all altitudes
ঘ) none of these.
১০। According to Robert E. Horton, the equation of infiltration capacity curve, is (where letters carry their usual meanings)
ক) f = fc (fo - fc) ekt
খ) f = ft - (fo - fc) e-kt
গ) f = ft + (fo - fc) e-kt
ঘ) f = f + (fo - fc) ekt
১১। According to Thiem, the permeability of an aquifer may be obtained from the equation
ক)
খ)
গ)
ঘ)
ঙ) all the above.
১২। An intense rain is falling at a uniform rate of 7.5 cm/hour for a period of 60 minutes on a basin whose areas is 500 hectares. If the average infiltration capacity during the entire rain period is assumed to be 1.5 cm/hr, the maximum run-off rate based on 10 minute peak percentage of 16% from distributing graph of the basin, is
ক) 40 cumecs
খ) 60 cumecs
গ) 80 cumecs
ঘ) 100 cumecs.
১৩। Bernard‘s distribution graph is a plot of time on X-axis and
ক) run off on the y-axis
খ) total run off on the y-axis
গ) percentage of total surface run off on y-axis
ঘ) percentage of total surface run off during uniform time intervals on y-axis
ঙ) none of these.
১৪। Boston society of Civil Engineer‘s formula in cumecs/square km is based upon
ক) rainfall and drainage area
খ) total run off and drainage area
গ) drainage area and its shape
ঘ) drainage area.
১৫। Burge formula cumecs is based upon
ক) rainfall and drainage area
খ) run off and drainage area
গ) drainage area and its shape
ঘ) drainage area.
১৬। Consumptive use of a crop during growth, is the amount of
ক) interception
খ) transpiration
গ) evaporation
ঘ) all the above.
১৭। Dicken‘s formula for high flood estimate, is useful only for the catchments in
ক) Southern India
খ) Northern India
গ) Eastern India
ঘ) Western India.
১৮। Discharge curve may be extended by logarithmic method if
ক) cross section of river is uniform
খ) river is broader and shallower
গ) river is of any type
ঘ) none of these.
১৯। Evaporation losses depend upon
ক) area of the water surface and depth of the water