Supervision 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.
Duties in practice
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. Materials must be checked against the approved drawings and specifications, and any site change must go back to the designer for approval - a supervisor does not redesign on site. Non-compliance that is not corrected must be reported to the client and, where required, to the licensing authority, with copies retained. Absence of a written record usually means the supervisor carries the liability.
Ethics and responsibility
Stay inside your competence; disclose conflicts of interest; keep project information confidential; refuse gifts that could influence judgement; never sign for work inspected by someone else or not inspected at all. Public safety outranks the client's schedule and the contractor's convenience. Signing a progress certificate is a professional statement, not a formality.
Worked example
A concealed gas line is tested at the specified pressure and loses more than the permitted amount over the holding period. The correct sequence: record the reading in the logbook, issue a non-conformance to the contractor, order repair and a full re-test witnessed by you, and withhold certification of that item in the progress statement until it passes. Accepting a verbal assurance and a later 're-test' without your presence transfers the risk to you.
Traps
Approving remote or delegated inspections; certifying quantities for unverified work; accepting informal site changes; and letting a contractor's pressure to finish override a failed test.