61.


Answer: (b)

62. Consider the following statements:
1. Air masses get cooled in nature mainly because of contact with cooler bodies
2. Air masses lose heat as they get contracted at higher elevations
3. The type and intensity of the resulting precipitation is a function of the rate of adiabatic cooling

Which of the above statements are correct?
(a) 1, 2 and 3
(b) 1 and 2 only
(c) 1 and 3 only
(d) 2 and 3 only

Answer: (c)

63. Mean precipitation over an area is best obtained based on gauged data using:
(a) Thiessen method
(b) Arithmetic mean method
(c) Linearly interpolated isohyetal method
(d) Orographically weighed isohyetal method

Answer: (d)

64.

Answer: (d)

65.

Answer: (c)

66.
Consider the following statements:

Which of the above statements is/are correct?
(a) 3 only
(b) 2 only
(c) 1 only
(d) 1, 2 and 3

Answer: (a)

67. In routing a flood through a reach the point of intersection of inflow and Outflow hydrographs coincides with the peak of outflow hydrograph
(a) In all cases of reservoir flood routing
(b) When the inflow is into a reservoir with an uncontrolled outlet
(c) When the inflow is into a reservoir with a controlled outlet
(d) In channel routing only

Answer: (b)

68.
(a) 0.3
(b) 0.4
(c) 0.5
(d) 0.6

Answer: (c)

69. For a gravel of median size 16 mm, the critical shear stress is about
(a) 24 Pa
(b) 15 Pa
(c) 07 Pa
(d) 03 Pa


Answer: (b)

70.

Answer: (c)