38.

39.

40.

41.

42.

48.

3

45.

In the case of a centrifugal pump, the kinetic energy per unit weight of water is found to be
8 Nm and the work done per unit weight of water was 24 Nm. So the percentage of work
converted into kinetic energy will be :

‎൫ 33.33%‏ 964 ھ۸)
‎D) 3%‏ 30% )©(

‎Cavitation begins to appear in centrifugal pumps when :
(ക) suction head equals delivery head
(8) vapour pressure of liquid is less than suction pressure
(C) the pressure at suction equals vapour pressure of liquid
(D) the pressure at suction falls below the vapour pressure of liquid

‎The difference between the net inlet head and the head corresponding to the vapour pressure
of the liquid in centrifugal pumps is called :

‎(A) Net Primary Suction Head (B) Negative Suction Head
(0 Suction Head (D) Net Positive Suction Head

‎The knocking பகு in CI engines increase with :
(2) Increase of compression ratio
(8) Decrease of compression ratio
(C) Increasing the temperature ग inlet air
(D) None of the above

‎The phenomenon of evaporation from water surface, from the soil an from plant is generally
known as :

‎(A) Vaporization (B) Boiling
(©) Transpiration (D) Hydration

‎Sprinkler irrigation is not suitable for :
(4) ‏عدم‎ (8) wheat
(C) plantation crops (D) none of them

‎Subsurface drains are :
(4) underground artificial channels (B) free water drained from open well
(9) artificial drains made over the earth (D)) none of these

‎The main function of distributor of ignition of system of engine is to :
(ക) Open the primary circuit (B) Close the വേഡ്‌.
(@ Both (D) None of the above

‎142/2015 8 A

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