Japan · Institution of Professional Engineers, Japan (IPEJ) · licensing
Five-option multiple choice on mark sheet: basic science 1 h (15 of 30), aptitude/ethics 1 h (15 questions), specialist 2 h (25 of 35, 50 marks). No eligibility limits.
Leads to Associate Professional Engineer (技術士補). Pass line not verified. The 2026 date shown was 22 Nov 2026; recheck.
Official source: https://www.engineer.or.jp/c_topics/011/011423.html
Original questions written to this exam's published syllabus and pattern. Not past papers.
1. In proximate analysis, a 1.000 g air-dried coal sample loses 0.050 g at 110 °C. A second 1.000 g sample loses 0.380 g in a covered crucible at about 950 °C. A third leaves 0.100 g of ash. What is the fixed carbon?
B. 52%
Moisture = 5%. The 38% loss at 950 °C includes the moisture, so volatile matter = 38 − 5 = 33%. Ash = 10%. Fixed carbon = 100 − 5 − 33 − 10 = 52%. Taking the whole 38% as volatile matter gives 47%; also forgetting ash gives 57%; subtracting only the 38% gives 62%.
Engineering Physics & Chemistry · Fuels and combustion chemistry
2. A herbicide applied after sowing but before the crop and weeds emerge is described as:
C. Pre-emergence
Pre-emergence herbicides are applied to the soil surface after sowing and before emergence. Post-emergence products go on emerged weeds; pre-plant incorporated products are mixed into soil before sowing; a directed spray is a post-emergence spray aimed below the crop canopy.
Crop Production & Protection for Engineers · Weed management
3. According to the first fundamental canon of the NSPE Code of Ethics, what must engineers hold paramount?
A. The safety, health and welfare of the public
The first canon requires engineers to hold paramount the safety, health and welfare of the public. Duties to clients and employers (as faithful agents) come after it, so when they conflict with public safety, public safety prevails.
Professional Practice, Ethics & Laws · Codes of ethics for engineers
4. The Pilling–Bedworth ratio of aluminium is about 1.3 and that of magnesium about 0.8. What does this predict about their dry oxidation?
C. Aluminium forms a compact protective oxide; magnesium's oxide is porous and non-protective
A ratio below 1 means the oxide occupies less volume than the metal consumed, so it cannot cover the surface (magnesium). A ratio between about 1 and 2 gives a continuous, adherent film (aluminium). Spalling is expected for ratios well above 2.
Engineering Physics & Chemistry · Corrosion and its control
5. A farmer irrigates a prepared field, lets the first flush of weeds emerge, kills them with a shallow pass or a non-selective herbicide, and then sows. This practice is called:
C. A stale seedbed
The stale seedbed technique depletes the surface weed seed bank before sowing. Solarisation heats moist soil under clear plastic; smother cropping uses a competitive crop to suppress weeds; allelopathic mulching relies on chemicals released by residue.
Crop Production & Protection for Engineers · Weed management
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