Rajasthan PSC — Assistant Agriculture Engineer (Agriculture Engineering syllabus) · India · Rajasthan Public Service Commission
Original practice questions written to the published syllabus · not past papersMachines that prepare the seedbed and put seed and fertiliser in the ground, and how to calibrate and cost them.
In the exams: GATE AG Section 2 Farm Machinery (~11 marks a year 2019–26; seed-drill calibration in 7 of 8 papers); ICAR AIEEA-PG Unit V; ICAR AICE subject 39 Unit 1; PRC ABE; state PSCs
How our questions for Rajasthan PSC spread across the units of Farm Machinery & Equipment I — Tillage, Sowing, Planting, Fertiliser. Difficulty: 34 easy, 10 medium, 2 hard.
| Objectives and types of tillage | 4 | |
| Mouldboard plough | 4 | |
| Seed drills and planters | 4 | |
| Field capacity and field efficiency | 4 | |
| Cost analysis of implements | 4 | |
| Harrows, cultivators and rotavators | 3 | |
| Furrow geometry | 3 | |
| Seed-metering mechanisms: fluted roller, cup, plate and pneumatic | 3 | |
| Furrow openers | 3 | |
| Fertiliser distributors | 3 | |
| Calibration of seed drills | 3 | |
| Disc plough | 2 | |
| Chisel plough and subsoiler | 2 | |
| Forces on tillage tools, draft and hitching | 2 | |
| Paddy and vegetable transplanters | 2 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
The size of a mouldboard plough is expressed as
A. width of cut of each bottom and the number of bottoms
A plough is specified by the width of cut per bottom and number of bottoms, which fix total width. Depth is a setting and power depends on soil.
A chisel plough differs from a mouldboard plough mainly in that it
C. shatters and loosens soil without inverting it
Chisel shanks loosen and shatter soil and leave residue on the surface, which is why they suit conservation tillage. Mouldboards invert; rotary tillers need PTO drive.
Which disc harrow has one front gang and one rear gang placed to one side of the tractor centre line?
B. Offset disc harrow
The offset harrow's two gangs work in opposite directions and are offset laterally, letting it work under tree branches. Single-action has two gangs end to end; tandem has four gangs.
The bakhar used in the black soils of central India is best described as a
A. blade harrow that cuts beneath the surface with a horizontal blade
The bakhar is a traditional blade harrow; its horizontal blade cuts under the crust and kills weeds.
On a mounted mouldboard plough, the width of cut of the front bottom is adjusted mainly by
A. rotating or shifting the cross-shaft of the linkage
Moving the cross-shaft changes the front bottom's lateral position relative to the tractor wheel and hence its width. The top link sets fore-and-aft level.
Most mechanical rice transplanters require seedlings raised as
B. a mat nursery
The picking fork cuts blocks from a mat, so seedlings must be grown densely on a thin soil layer forming a mat. The roots interlock so the mat holds together when the fork cuts it.
A spinning-disc fertiliser broadcaster distributes granules by
B. throwing them with vanes on a rotating disc
Centrifugal broadcasters throw granules from vaned discs. Drop spreaders use openings along the hopper and pneumatic spreaders use a boom.
Field efficiency is defined as
A. effective field capacity divided by theoretical field capacity
FE = EFC/TFC, always at most 100 %. Power ratios describe tractive or transmission efficiency, not field efficiency.
Which change would most improve field efficiency of a tillage operation?
B. Working longer runs with fewer turns in larger, regular fields
Turning time is a main loss; long runs in regular fields reduce turns per hectare. Wider implements with more overlap lower effective width, and speed changes TFC more than efficiency.
How many hours will a machine with an effective field capacity of 0.6 ha/h take to cover 60 ha?
C. 100 h
Time = area/EFC = 60/0.6 = 100 h. 36 comes from multiplying the numbers. 10 h reads 0.6 ha/h as 6 ha/h; 0.01 h inverts the ratio.
Ten here, 46 in the app. The Laisha app has every practice question we have written to Rajasthan PSC 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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