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 papersDesigning machines around the people who use them, and measuring the noise, vibration and work load they face.
In the exams: GATE AG Section 3 (ergonomics asked in all 8 papers 2019–26); ICAR AIEEA-PG Unit V; ICAR AICE subject 39 Unit 5; NCEES PE health and safety
ICAR AIEEA-PG — Agricultural Engineering & Technology
Unit V farm machinery and power: definitions (anthropometry, static and dynamic dimensions, percentiles), work physiology terms (VO2max, heart rate, cardiac cost), noise and vibration basics, ROPS and safety devices, and women-friendly tools. Mostly recall with short calculations.
How our questions for ICAR AIEEA-PG spread across the units of Human Engineering, Ergonomics & Safety. Difficulty: 35 easy, 8 medium, 0 hard.
| Work physiology: energy expenditure, heart rate and oxygen uptake | 7 | |
| Anthropometry | 6 | |
| Design of controls and seats | 6 | |
| Noise: decibels and exposure | 6 | |
| Tools designed for women workers | 5 | |
| Vibration: transmissibility and damping | 4 | |
| Farm accidents and their causes | 4 | |
| Dust and thermal stress | 3 | |
| Safety standards and ROPS | 2 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
The stature of a group of farm workers is normally distributed with mean 1640 mm and standard deviation 58 mm. The 95th percentile stature is closest to
D. 1735 mm
X95 = mean + 1.645 × SD = 1640 + 1.645 × 58 = 1735.4 mm. Mean + 1 SD (1698 mm) is only the 84th percentile; 1545 mm is the 5th percentile; z = 1.96 (1754 mm) is the 97.5th percentile, a common slip from two-sided confidence intervals.
The minimum clearance between a tractor steering wheel and the seat (thigh clearance) should be designed for
A. a large user, typically the 95th percentile of the larger user group
A clearance must accommodate the biggest users, so it is set for a high percentile of the larger group. Designing for the average leaves half the users cramped; the 5th percentile principle applies to reaches, not clearances.
The distance from the seat to a frequently used hydraulic control lever should be designed so that it can be reached by
B. a small operator, typically the 5th percentile of the smaller group
If the small user can reach the lever, everyone larger can too. Using the 95th or 50th percentile would leave small users, often women, unable to reach without leaving the seat.
Measurement of the maximum forward reach of a seated operator while operating a lever is an example of
A. dynamic (functional) anthropometry
Functional dimensions are measured while the body performs a movement. Static anthropometry measures the body in a fixed standard posture, for example sitting height.
The anthropometric dimension that primarily determines seat height is
B. popliteal height
Seat height is set from the floor-to-underside-of-thigh (popliteal) height so the feet rest flat without pressure under the thighs. Sitting height sets backrest and head clearance; hip breadth sets seat width.
Foot-operated controls such as the tractor clutch and brakes are preferred over hand controls when
B. large forces are needed while the hands are busy steering
Legs deliver larger forces and free the hands. Precise positioning is better done by hand.
The Borg rating of perceived exertion (RPE) scale commonly used in field ergonomics runs from
D. 6 to 20
The original Borg RPE scale runs 6–20, roughly one-tenth of heart rate in young adults. Category-ratio scales run 0–10. 1 to 5 is a short rating scale, not the Borg RPE.
Three identical pumps each produce 90 dB at the operator's position. With all three running, the level is about
A. 94.8 dB
L = 90 + 10 log 3 = 94.77 dB. 93 dB is the two-source answer; 270 is arithmetic addition; 99.5 wrongly uses 20 log 3.
The seated human body is most sensitive to vertical whole-body vibration in the frequency range of about
B. 4–8 Hz
Trunk and abdominal resonance lie roughly in 4–8 Hz, close to tractor ride frequencies. Below 0.5 Hz motion sickness dominates; 50–100 Hz and above are hand-arm and audio ranges.
A roll-over protective structure on a tractor protects the operator effectively only if
A. the seat belt is worn
The belt keeps the operator inside the clearance zone; an unbelted operator can be thrown out and crushed by the tractor or the ROPS itself.
Ten here, 43 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.
An AI operating system for agriculture: free guides, manuals and tools written for every country.