CD7049. TOTS 1C-Fixed and Portable Gas Detections Systems

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CD7049. TOTS 1C-Fixed and Portable Gas Detections Systems
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About this collection

The Seagull CBT bank is organised into modules covering safety, shipboard operations, maintenance and other topics. Original module names and codes are retained to help you find the topic you need.

“Seagull CBT — CD7049. TOTS 1C-Fixed and Portable Gas Detections Systems” contains 56 questions across 1 collection.

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Sample questions and answers

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Cotton filters are sometimes used with hydrocarbon gas detectors. What is their purpose?

One correct answer

To remove water from the sample.✓ Correct answer
To stop pressure surges in the sample line.
To remove dust from the sample.
To prevent chemical contamination of the sample.

What type of sensor is fitted in a tankscope?

One correct answer

A non-catalytic heated filament.✓ Correct answer
A catalytic filament resistor.
A PT100 temperature sensor.
A magnetic induction sensor.

What range of flammable gas can be detected by a thermal conductivity meter?

One correct answer

0-100% gas.✓ Correct answer
0-10% gas.
0-100% Lower Flammable Limit.
0-10% Lower Flammable Limit.

When starting to test a sample using a Combustible Gas Indicator (Explosimeter), the needle immediately flicks to maximum deflection, then returns to zero. What is indicated?

One correct answer

That the flammable gas concentration is above the Lower Flammable Limit.✓ Correct answer
That the battery is incorrectly fitted.
That the instrument was not warmed up, but is now working correctly.
That the sensor element has been contaminated by toxic gas.

What equipment is required to test an enclosed space for the presence of toxic gas before entry?

One correct answer

Chemical absorption tubes.✓ Correct answer
An Explosimeter.
An oxygen meter.
A tankscope.

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