Iran Nezam Mechanical Supervision Exam study guide
Iran Nezam Mechanical Supervision Exam · Work through your exam, one topic at a time.
The Iran Nezam Mechanical Supervision credential (نظارت مکانیک) is a professional licence issued through the Iranian engineering registration system. Holders are authorised to supervise the installation of mechanical building services - HVAC, plumbing and drainage, gas, fire suppression and refrigeration - on construction projects, checking that work conforms to approved drawings, the national building code and good practice. The Iran Nezam Mechanical Supervision Exam study guide has 10 sections and about 3,454 words.
01Building Mechanical Systems and HVAC Design
This domain tests whether you can select, size, lay out and document HVAC systems that satisfy the Iranian National Building Code (chiefly Mabhas 14) and accepted practice. Questions are usually quantitative or judgement-based: which system suits an occupancy, what size a duct or pipe should be, and why a design fails at part load.
356 words, about 2 min02Heating and Cooling Load Calculations and Energy Efficiency
This domain tests load estimation and the energy rules that follow it: design conditions, envelope transmission, solar and internal gains, ventilation and infiltration, diversity, and the efficiency limits of boilers, chillers and the envelope itself (Mabhas 19). Use site-specific design conditions, not generic ones: Iranian plateau summers commonly fall near 35–40 °C dry bulb with large daily swing, and winters near −5 to 0 °C depending on city.
357 words, about 2 min03Sanitary and Plumbing Systems
This domain covers sanitary drainage and venting inside the building: fixtures, traps, drainage pipe sizing by fixture units, venting, slopes, cleanouts, grease and oil separation, sumps, materials and the tests that prove the installation is sound. Every fixture except a few listed exceptions needs a water-seal trap of 50–100 mm, and the trap must be protected by venting or an approved air-admittance valve.
353 words, about 2 min04Water Supply and Drainage
This domain tests potable water supply - demand, storage, boosting, distribution pressure, hot water and the drainage of the supply side - as regulated by Mabhas 14 and Mabhas 16. Estimate demand from occupancy: residential consumption commonly taken in the 150–250 L per person per day range, offices far lower, plus a fire reserve kept separate.
325 words, about 2 min05Fire Protection and Life Safety Systems (Mechanical Aspects)
This domain tests fixed fire-fighting and smoke-control systems as mechanical works: sprinklers, hose reels, hydrants and standpipes, fire pumps, water storage, and smoke exhaust or stair pressurisation, governed mainly by Mabhas 3 with NFPA-based detail. Classify the occupancy and hazard first - light, ordinary or extra hazard - because the design density and operating area follow from that classification.
329 words, about 2 min06Fuel Gas, LPG and Combustion Systems
This domain tests gas piping and combustion safety under Mabhas 17 (natural gas) and the relevant LPG rules: pipe sizing, materials, appliance pressures, ventilation, flues and testing. Iranian natural gas is distributed to appliances at roughly 17 mbar (about 1/4 psi), with some commercial equipment at 25 mbar; LPG is supplied at about 28–30 mbar through a regulator.
349 words, about 2 min07Refrigeration and Air Conditioning Equipment
This domain tests refrigeration plant and air-conditioning equipment selection, performance and safety: chillers, DX and VRF systems, cooling towers, air-handling units, compressors, refrigerants and part-load behaviour. Vapour-compression performance is expressed as COP (cooling kW per input kW), EER (Btu per Wh) or kW/TR, where 1 TR = 3.517 kW and COP = 3.517 / (kW/TR).
329 words, about 2 min08Building Regulations, National Building Code (Mabhas 14, 16, 17, 22) and Standards
This domain tests how the National Building Code is structured and applied, and which code governs a given mechanical question. Mabhas 14 governs design and installation of mechanical installations: water supply, drainage, heating, cooling, ventilation and related equipment rooms and shafts.
366 words, about 2 min09Supervision Duties, Engineering Ethics and Professional Responsibility
This domain tests what a mechanical supervisor actually owes the project: verification at defined stages, honest documentation, and refusal to certify work that has not been checked. Supervision follows Mabhas 2 and the supervision instructions issued by the engineering organisation: inspect at defined stages (before concealment of buried or walled pipework, before pouring, at equipment installation, at pressure and smoke tests, at commissioning and handover), record each visit in the supervision logbook, and issue written notices for defects.
344 words, about 2 min10Construction Management, Contracts and Quantity Surveying for Mechanical Works
This domain tests measurement, payment and contract administration for mechanical installations: how quantities are taken off, how the price list is applied, and how progress payments, adjustments and claims are handled. Mechanical quantities are measured under the applicable price list for mechanical installations, by discipline chapter (water, drainage, gas, heating, ventilation, fire).
346 words, about 2 min