Water is useful for
-
running hydroelectric turbines -
floating the boats and ships -
providing steam for running locomotives -
warming dwelling units -
all the above.
While calculating the average depth of annual precipitation in a catchment basin, importance to individual raingauge station is given in
-
Arithmetical method -
Thiessen's mean method -
Isohyetal method -
both (a) and (b) -
both (b) and (c).
A volume of air at constant barometric pressure may be brought to dew point by
-
increasing the temperature -
decreasing the temperature -
neither (a) nor (b) -
both (a) and (b).
Pick up the correct statement from the following :
-
Central portion of a cyclone acts as a chimney through which air gets lifted -
Cyclonic precipitation caused by a warm front is generally continuous -
Convective precipitation generally occurs in the form of showers of high intensity in short duration -
Greatest amount of orographic precipitation falls in the windward side of the barrier -
All the above.
Precipitation caused due to upward movement of warmer air as compared to surrounding air, is called
-
cyclonic precipitation -
convective precipitation -
orographic precipitation -
none of these.
Bernard's distribution graph is a plot of time on X-axis and
-
run off on the y-axis -
total run off on the y-axis -
percentage of total surface run off on y-axis -
percentage of total surface run off during uniform time intervals on y-axis -
none of these.
A control meter is preferred to a weir because
-
it measures the discharge even in silt laiden streams -
the velocity of approach of the channel increases above the control, and thus removes the silt completely -
it is not damaged by floating debris -
all the above.
Pick up the correct statement from the following :
-
The amount of water retained on the surface of soil grains by molecular attraction, is known as pellicular water -
The degree of resistance to movement of the pellicular water generally expressed by the surface tension -
The pellicular water held in any soil, is called field capacity -
The portion of the pellicular water absorbed by the root action of the vegetation, is called available moisture -
All the above.
For predicting floods of a given frequency, the best reliable method is
-
Unit hydrograph method -
Gumbel's analytical method -
California method -
None of these.
Pick up the correct statement from the following :
-
The throat of the section of a control meter is either rectangular or trapezoidal -
The floor of the control meter throat is almost level -
The floor of the expanding outlet of the control meter is given a steep slope -
A properly designed control meter is associated with the phenomena of hydraulic jump -
All the above.
Phytometer method is generally used for the measurement of
-
interception -
evaporation -
transpiration -
none of these.
For predicting floods of a given frequency, the best reliable method is
-
Unit hydrograph method -
Gumbel's analytical method -
California method -
None of these.
Pick up the correct statement from the following :
-
The zone below water table, is called zone of saturation -
The zone above water table, is called zone of aeration -
The water which exists in the zone of saturation, is called ground water -
Water in the zone of saturation, remains under hydrostatic pressure -
All the above.
If the axial length of a drainage basin iskm and its form factor is 0.the total area of the basin is
-
205 sq. km. -
215 sq. km. -
225 sq. km. -
235 sq. km. -
245 sq. km.
The efficiency of a pump may be taken as
-
0.55 -
0.60 -
0.65 -
0.70
If the loss due to friction in pipes is 4 m, the total losses in strainer and bends may be taken as
-
0.10 m -
0.20 m -
0.5 m -
1.0 m.
Knowledge of hydrology is necessary for civil engineers for
-
designing and construction of irrigation structures -
designing and construction of bridges and culverts -
flood control works -
all the above.
The critical depth in a channel can be produced
-
by raising the bottom of the channel -
by lowering the bottom of the channel -
by decreasing the width of the channel -
by increasing the width of the channel -
both (a) and (c) of above.
If the dew point is greater than 0°C
-
dew will be formed -
frost will be formed -
vapours will be formed -
neither of these.
The recurrence interval (R.I.) ofcm rain storm at a place is 5 years.
-
The place will definitely have 20 cm rain storm after every five years -
The place may have 20 cm rain storm after every five years -
The place may have 20 cm rain storm within a set of 5 years twice -
None of these.
Non-recording rain gauges
-
collect the rain whose volume is measured by means of graduated cylinders -
collect the rain which is directly measured by means of graduated cylinders in centimetres of water depth -
are generally used in hilly terrain -
are cylindrical in shape.
Precipitation caused due to striking of air masses with a topographical feature, is called
-
orographic precipitation -
convective precipitation -
cyclonic precipitation -
none of these.
An intense rain is falling at a uniform rate of 7.5 cm/hour for a period ofminutes on a basin whose areas ishectares. If the average infiltration capacity during the entire rain period is assumed to be 1.5 cm/hr, the maximum run-off rate based onminute peak percentage offrom distributing graph of the basin, is
-
40 cumecs -
60 cumecs -
80 cumecs -
100 cumecs.
The time required by rain water to reach the outlet of drainage basin, is generally called
-
time of concentration -
time of overland flow -
concentration time of overland flow -
duration of the rainfall -
none of these.
A river is said to be of uniform section if in its section
-
a segment of a circle can be fitted -
a parabolic section can be fitted -
a rectangular section can be fitted -
a trapezoidal section can be fitted -
all the above.
The earthen embankments constructed parallel to the river banks at some suitable distance for flood control, are known as
-
floods walls -
river walls -
levees -
dikes -
both (c) and (d).
Discharge curve may be extended by logarithmic method if
-
cross section of river is uniform -
river is broader and shallower -
river is of any type -
none of these.
According to Thiem, the permeability of an aquifer may be obtained from the equation
-
-
-
-
-
all the above.
Isohytes are the imaginary lines joining the points of equal
-
pressure -
height -
humidity -
rainfall.
Humidity refers to
-
temperature of the air -
pressure of the air -
moisture content of the air -
volume of the air.