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84. In case of canal flow system, a sudden and turbulent but controlled passage of water
at a reach through appropriate functional arrangement is called as hydraulic jump.
In this context, which of the following statement is incorrect ?
A) Flow at the location is classified as rapidly varied flow

B) Passage of water is from subcritical to supercritical state

C) Considerable dissipation of energy is realised

D) Water flow transforms from shallow to relatively larger depth

85. An area of 20 ha needs to be irrigated by a pump working for 12 hours per day. The
available moisture holding capacity of the soil is 16 cm/m of soil and depth of root
zone is 1.0 m. The irrigation needs to be done when 50 per cent of available soil
moisture in the root zone is depleted. The peak rate of moisture use by the crop is
4.0 mm. Water application efficiency is 70 cent. The depth of irrigation period is

A) 20.0 days B) 11.4 days C) 26.4 days D) None of the above
86. Diesel cycle efficiency is maximum when the cut-off is

A) Increased B) Decreased C) Zero D) One
87. 3-bottom tractor drawn mounted MB plough will have

A) Landside in front bottom only B) Landside in the middle bottom only

C) Landside in rear bottom only D) Landside in all the bottoms

88. In order to obtain minimum untilled soil the disks of the rear gangs in a tandem
disk harrow in comparison to discs of front gangs are mounted

A) In the same track of front gang

B) In the middle of two front consecutive gangs
C) Ata lesser gang angle than of front gang

D) None of the above

89. The ratio of drawbar horsepower to the power of input to the final drive axle is

A) Mechanical efficiency B) Traction coefficient
C) Power ratio D) Tractive efficiency
90. In badly lodged crop situations, the reel index should be when compared

to upright crops.

A) Less B) More C) Equal D) None of the above

91. The clearance between knife section and ledger plate is
A) 0.1-0.2 mm B) 0.2-0.3 mm C) 0.3-0.5 mm D) 0.5 - 1.0 0

92. type of nozzle produces spray pattern of 30° forward and
30° backward.
A) Flat fan nozzle B) Even flat fan nozzle
C) Off-centre fan nozzle D) Twin-orifice fan nozzle