GATE Industrial Engineering: Work System Design – Previous Year Questions

13 GATE previous year questions on Work System Design (Industrial Engineering, Production and Industrial Engineering) with answers and explanations, from every paper.

1. GATE 2021 PI Q50 (2 marks, Numerical answer) – Five observed spot-welding times are 40,35,45,37,43 seconds. Standard time is 45 s and allowance is 9 s. Find operator performance rating in percent…
2. GATE 2022 PI Q21 (1 mark, Multiple choice) – Match the shown therblig symbols P,Q,R,S with meanings 1: rest to overcome fatigue; 2: avoidable delay; 3: inspect; 4: search.
3. GATE 2022 PI Q60 (2 marks, Numerical answer) – Observed machining-cycle times 42,43,44,45,46 minutes have frequencies 1,2,3,2,1 respectively. Worker rating is 110%. Find standard time with 10%…
4. GATE 2023 PI Q29 (1 mark, Numerical answer) – Standard time per machine job is 10 min. Five machines are each available 300 hours/month with average utilization 80%. Find maximum monthly…
5. GATE 2023 PI Q42 (2 marks, Multiple choice) – Match recording methods P: outline process chart; Q: string diagram; R: multiple activity chart; S: two-handed process chart, with applications 1:…
6. GATE 2023 PI Q50 (2 marks, Numerical answer) – A work-sampling study with 100 observations found 25% worker idle time. Find the number of observations required for ±10% accuracy at 95.45%…
7. GATE 2024 PI Q21 (1 mark, Multiple choice) – Which therblig does not advance work and can be eliminated through motion economy?
8. GATE 2024 PI Q22 (1 mark, Multiple choice) – With many work-sampling observations, which distribution estimates required sample size?
9. GATE 2024 PI Q61 (2 marks, Numerical answer) – A packaging worker rated 120% takes an observed average nine minutes. Allowances are 10% of standard time. Find standard time (integer minutes).
10. GATE 2025 PI Q19 (1 mark, Multiple choice) – A worker is idle in x of n work-sampling observations. Find the standard deviation of estimated mean idle proportion.
11. GATE 2025 PI Q48 (2 marks, Numerical answer) – A worker receives 30 minutes personal allowance during an eight-hour shift. Normal product time is five minutes. Find standard time (integer seconds).
12. GATE 2026 PI Q50 (2 marks, Multiple select) – The two-hand operation chart shown describes nut-and-bolt assembly by a left-handed operator. Which ONE OR MORE statements are correct?
13. GATE 2026 PI Q62 (2 marks, Numerical answer) – A job has elements A,B, each observed three times. A times are 20,25,21 s with 105% rating; B times are 19,17,18 s with 90% rating. Add 20%…