A volume of air at constant barometric pressure may be brought to dew point by i

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Question
A volume of air at constant barometric pressure may be brought to dew point by
Options
A. increasing the temperature
B. decreasing the temperature
C. neither (a) nor (b)
D. both (a) and (b).

Correct Answer

decreasing the temperature

Water Resources Engineering problems

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1. When a constant discharge 2.91 litres/sec. was obtained in a pumping test, the draw downs in the test wells at 3 m and 6.184 m were 2.6 m and 0.3 m respectively. If over-all depth of the pumping well was 16 m, the permeability of the soil, is
Options
A. 0.0005 cm/sec
B. 0.001 cm/sec
C. 0.002 cm/sec
D. 0.01 cm/sec.

2. Pick up the correct statement from the following :
Options
A. Higher the gauge, more deficient will be the rain catch
B. Heavier the rain, lesser will be the rain catch
C. The trees serving as wind brakes in the vicinity of the gauge, should not subtend angles greater than 45�
D. Coniferrous forest is idealy suited for installing the gauge
E. All the above.

3. The elevation Z of the watershed is : (where letters carry their usual meanings)
Options
A. reduced level of the top most point of the basin
B. reduced level of the lower most point of the basin
C. average elevation of the highest and lowest point of the drainage basin
D. obtained by the formula

4. Pick up correct statement from the following :
Options
A. The air from outer portion of cyclones gets lifted for causing precipitation
B. The air from central portion of cyclone's gets lifted for causing precipitation
C. The air from entire surface of the cyclones gets lifted for causing precipitation
D. None of those.

6. Levees and flood walls,
Options
A. are designed to carry unbalanced water load
B. are designed with adequate dimensions
C. are means of controlling floods
D. are never provided free-boards.

7. Pick up the correct statement from the following :
Options
A. Hydrograph is a plot of discharge and time
B. In hydrographs, time is plotted on X-axis
C. The maximum flow in the river due to rainfall, is called peak flow
D. Peak flows are different for rainfalls
E. All the above.

8. Pick up the correct statement from the following :
Options
A. The amount of water retained on the surface of soil grains by molecular attraction, is known as pellicular water
B. The degree of resistance to movement of the pellicular water generally expressed by the surface tension
C. The pellicular water held in any soil, is called field capacity
D. The portion of the pellicular water absorbed by the root action of the vegetation, is called available moisture
E. All the above.

10. Pick up the correct statement from the following :
Options
A. Run off and surface run off are the same
B. Run off includes the water flowing over the surface
C. Run off is sometimes called discharge of the river
D. Surface run off is sometimes called stream flow.

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