TST Engineering Services | Module 38 Sewage Treatment Quiz

Start your sewage-treatment question bank

This quiz is designed to feel like a strong TST recap: it checks regulatory understanding, machinery knowledge, biology, watchkeeping, fault diagnosis and the environmental judgement expected in MCA-style oral delivery.

Interpret Annex IV routes for approved plants, comminuting/disinfecting systems and holding tanks.

Diagnose aeration loss, septic conditions, H₂S risk and non-compliant effluent.

Distinguish BOD, COD, TSS, pH, microbiology and residual-disinfectant trends.

Relate AWWTS, MBBR, DAF and membrane-bioreactor watch points to abnormal findings.

Apply engineering-report thinking to shutdown, inspection, restart and safety scenarios.

Finish every answer with environmental protection, evidence and correct record keeping.

Content basis: TST Module 38 sewage notes, the attached training images, WEM sewage engineering-report prompts, GEK revision notes and the wider Annex IV / IMO sewage-treatment compliance framework.

Report-based oral prompts

Use these longer prompts after the MCQ set if you want a more report-writing or oral-exam challenge.

Sketch and describe an aerobic sewage treatment plant, naming major compartments and showing direction of flow.

State, with reasons, three operational circumstances that may adversely affect final effluent quality.

State, with reasons, three operational circumstances that may adversely affect the quality and quantity of circulated air.

Describe, with reasons, the function and purpose of the macerator unit.

Describe, with reasons, the function and purpose of the vacuum-erator / vacuum collection arrangement.

The final effluent is discoloured and has an unpleasant odour. Describe a structured fault-finding procedure.

An overflow problem has occurred in the chlorination section. Describe the checks you would make and the order in which you would make them.

The sewage plant must be shut down and sewage retained in a storage tank in the engine room. List three safety problems and their control measures.

Describe how you would prepare a sewage-treatment system for internal inspection by a Class surveyor, including safe entry precautions.

List the likely mechanical defects you might find during internal inspection of a sewage-treatment plant.

Describe how you would restart the system and return it to full operating capacity after inspection or major maintenance.

Explain how you would justify the decision to stop overboard discharge even though the plant remains powered and technically 'running'.

Question 1 of 33 Regulation

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Module 38 Recap

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Review your performance and revisit the questions you flagged or missed. The explanations are written to reinforce the engineering reasoning behind the correct answer.

Sewage Treatment Systems
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Start your sewage-treatment question bank

Module 38 Recap

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