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Civil Engineering Objective Questions { Water Resources Engineering }



57. The rainfall cycle period in India is taken as
A. 15 years
B. 20 years
C. 25 years
D.35 years.

58.  Pick up the correct statement from the following : actual rainfall in a year at a place
A. Index of wetness ?normal rainfall of that place
B.(b ) Normal annual rainfall is obtained by taking the mean of the annual rainfall over a period of 35 years
C. Index of wetness gives an idea of the wetness of the year
D. All the above.

59.  Isohytes are the imaginary lines joining the points of equal
A. pressure
B. height
C. humidity
D. rainfall.

60. The area enclosed by the adjacent isohyets of a catchment basin are shown under : Isohyets in ctns I 40-50 I 50-60 160-70 70-80 I 80-90 Area in sq. km I 1500 , 2500 I 3000 2000 1000 The average depth of annual precipitation in the catchment basin will be
A. 60.0 cm
B. 60.5 cm
C. 61.5 cm
D. 63.5 cm.

61.  For determination of average annual precipitation in a catchment basin, the best method is
A. Arithmetical method
B. Thiessen's mean method
C. Isohyetal method
D. None of these,

62. While calculating the average depth of annual precipitation in a catchment basin, importance to individual raingauge station is given in
A. Arithmetical method
B. Thiessen's mean method
C. Isohyetal method
D. both A and B

63.  The rainfall at any place is described by
A. its intensity
B. its duration
C. its frequency
D. all the above.

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