Cargo-pump-room fixed gas detection
What is being checked
The inspector is checking whether the cargo-pump-room fixed gas-detection system is suitable for the gases and spaces concerned, within calibration and test limits, understood by users and linked to an effective response.
Ready onboard
0/6 completePractice questions
Answer aloud, then open the preparation point.
1Why is this the cargo-pump-room fixed gas-detection system suitable?
Match the expected gases, measuring ranges and sampling points at appropriate levels, extraction flow, hydrocarbon sensors, panel alarms and ventilation or shutdown interfaces to the space and operation.
2What is the difference between a bump test and calibration?
A bump test proves sensor and alarm response to gas. Calibration adjusts accuracy against a known concentration.
3How long must a remote sample be drawn?
Use the maker's pump and hose response time plus instrument stabilisation, accounting for hose length and gas characteristics.
4What happens after an alarm or sensor fault?
Follow pump stop, ventilation assessment, entry control, leak investigation and cargo-operation escalation; never treat a fault, inhibited channel or over-range reading as a safe atmosphere.
5Show the last complete test.
Trace sample-flow, channel calibration, alarm transmission and response tests to the identified instrument or channel and its corrective action.
Where an observation may arise
The instrument or sampling points at appropriate levels, extraction flow, hydrocarbon sensors, panel alarms and ventilation or shutdown interfaces did not suit the gas, range or atmosphere.
Users relied on a valid calibration sticker without a pre-use functional response test.
Calibration gas, certificate, sensor or battery status was expired or not traceable.
Hose response time, different levels, inaccessible areas or sample conditioning were not considered.
Personnel could not explain pump stop, ventilation assessment, entry control, leak investigation and cargo-operation escalation.
Inspection identified blocked or flooded sample, failed fan, poor sample location, inhibited channel or delayed alarm.
Master's practical note
Challenge the whole measurement chain: atmosphere, sample point, hose, pump, sensor, display, alarm and user decision. A current calibration label proves only one part.
Equipment boundary and references
Equipment boundary: Use maker instructions for calibration gas, cross-sensitivity, poisoning, oxygen requirements and sampling limitations. Never use a catalytic sensor in an inert atmosphere unless approved for that purpose.
References
- OCIMF SIRE 2.0 Question Library Part 1, Version 1.0, Question 5.6.5
- SOLAS Chapter II-2 regulation 4.5.10
- OCIMF ISGOTT
Last reviewed: 2026-09-13