ICAR AIEEA-PG — Agricultural Engineering & Technology (Major Subject Group 10) · India · National Testing Agency for ICAR
Original practice questions written to the published syllabus · not past papersSprayers, weeders, mowers, reapers, combines and threshers: how they work, how to calibrate them and where losses come from.
In the exams: GATE AG Section 2 (sprayer problems in 6 of 8 papers 2019–26); ICAR AIEEA-PG Unit V; ICAR AICE subject 39 Unit 2; PRC ABE
ICAR AIEEA-PG — Agricultural Engineering (Unit V)
Parts and functions of sprayers, pumps, nozzles, dusters, weeders, mowers, reapers, combines and threshers; performance terms such as threshing and cleaning efficiency; short calibration and field-capacity calculations.
How our questions for ICAR AIEEA-PG spread across the units of Farm Machinery & Equipment II — Plant Protection, Harvesting, Threshing. Difficulty: 26 easy, 32 medium, 4 hard.
| Nozzles and droplet spectra | 8 | |
| Combine harvester: header, threshing cylinder and concave | 6 | |
| Sprayers: hydraulic, air-assisted and electrostatic | 5 | |
| Weeders and inter-cultivation equipment | 5 | |
| Dusters | 4 | |
| Mowers: reciprocating and rotary; mechanics of cutting | 4 | |
| Reapers | 4 | |
| Combine separation and cleaning: straw walker and cleaning shoe | 4 | |
| Harvesting and threshing losses | 4 | |
| Threshers | 4 | |
| Sprayer calibration and application rate | 3 | |
| Root-crop diggers | 3 | |
| Cotton and sugarcane harvesting | 3 | |
| Straw and residue management machines | 3 | |
| Chaff cutters | 2 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
A common practical rule for replacing a set of spray nozzles is when their measured flow exceeds that of new nozzles by about
C. 10 per cent
Worn orifices enlarge; once flow is roughly 10% above new the pattern is also distorted and overdosing is significant. 1% is within measurement error; waiting for 50% would badly overdose.
Which weeding tool is designed to remove weeds within the crop row between plants?
A. Finger weeder
Finger weeders have rubber fingers, driven by ground wheels, that reach into the row and flick out small weeds while bending round stronger crop stems. Sweeps work between rows; ridgers heap soil.
Registration of a reciprocating cutter bar is correct when
B. at each stroke end the knife section centre lines coincide with the guard centre lines
That is the definition of registration. Straight guard points and parallel knife motion are alignment, a separate adjustment. Poor registration gives uneven cutting and uncut stems.
A reel of 1.0 m diameter must work with a reel index of 1.5 at a forward speed of 4 km/h. The reel speed is about
C. 31.8 rev/min
Reel peripheral speed = 1.5 × 4/3.6 = 1.667 m/s. N = v × 60/(πD) = 1.667 × 60/(π × 1.0) = 31.8 rev/min. Ignoring the index gives 21.2 rev/min; using radius in πD gives 63.7. 0.53 leaves the answer in rev/s (1.667/π).
The straw walkers of a conventional combine
A. lift and toss the straw rearward so free grain falls through
Crank-driven walker sections loosen the straw mat repeatedly; free grain falls through the decks to the grain pan. Threshing happens at the cylinder and air cleaning at the shoe.
Loss counts behind a wheat combine average 50 grains per m², and the thousand-grain weight is 40 g. The loss is
B. 20 kg/ha
Loss = 50 × 40/1000 = 2 g/m² = 2 × 10 = 20 kg/ha (kg/ha = grains/m² × TGW/100). The factor of ten slip gives 2 or 200. 0.2 kg/ha is a factor-of-100 slip.
Machine loss (threshing, separating and cleaning) of a combine is obtained from field counts as
A. total loss behind the machine minus header and pre-harvest losses
Grain found behind the machine includes what was already on the ground and what the header dropped; subtracting both leaves the loss from the threshing, separating and cleaning units.
A multi-crop axial-flow thresher differs from a conventional throw-in thresher in that
D. the crop moves helically along the drum axis, threshing and separating over a long path
Axial movement gives longer residence and separation; different crops are handled by changing speed, concave and sieves.
To reduce bruising on a potato digger elevator, the operator should
C. keep the elevator loaded with soil as a cushion and match its speed to forward speed
A soil cushion protects tubers; a bare fast-running elevator and high drops cause bruising. Heavy agitation also damages tubers.
Compared with spindle pickers, stripper cotton harvesters
D. harvest all bolls with more burs and trash, needing extra cleaning
Strippers take everything, so field cleaners or burr extractors and more gin cleaning are needed. They suit short, compact plants.
Ten here, 62 in the app. The Laisha app has every practice question we have written to ICAR AIEEA-PG in this subject, marked as you go, with timed papers, a jump-to-unanswered list and a certificate when you pass at 70 per cent.
Free for ten days, then one subscription of US$10 a month. We would rather say so here than have you find it later.
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