42.

43.

44.

45.

46.

47.

48.

49.

80.

51.

Water flow in large sized pipes for large flow rates can be measured using :
(^) Orifices (B) Notches
(C) Venturi meter (D) டன पलालः

An inward flow reaction turbine :
(ಗ) Impulse turbine (B) - Francis turbine
(C) Pelton turbine (D) All the above

The amount of moisture present in the air expressed as mass per unit volume is:
(ಗಿ) Absolute humidity (B) Saturation rate
(C) Vapour pressure (D) All the above

The salt concentration in irrigation water is generally méasured by :

(ക) SAR value (B) Electrical conductivity value
(C) pH value (D) BOD value
Optimum depth of kor — watering for rice is :
ക്ര 13.5 ‏عه‎ (B) 16.5cm
(@ 19cm (2) 20cm

The crop period of a crop is 120 days. It requires 10 cm depth of water at every 10 days.
Tts delta is :

(ಯ) 120 ‏صن‎ (B) 60cm
൫ 12 ला (D) 6cm

The water which cannot be extracted by the plants from the soil is called :
(ക) Capillary water (B) Hygroscopic water
(C) Available moisture (D) Field capacity

The canal which is not supposed to do any irrigation is called :
(ക) Major distributory ‏رمق‎ Minor distributory ' |
(൫ Branch canal (D) Main canal

The geological formation which contains and readily yields water to tube wells : |

(A) Water table (B) Aquifer |
(©) Aquiclude (D) Aquifuge
Type of cross — drainage work where canal is passed below the drainage is :
(^) Super passage (B) Aqueduct
(C) [पलः (D) Level crossing

143/2015 8 A