Question 1
A fixed gas detection system for toxic gas normally uses electro-chemical detectors. What level of accuracy can be expected?
- Approximately 10 % by volume.
- Approximately 30 % by volume.
- Approximately 5 ppm.
- Approximately 50 ppm.
TOTS 1A-Fixed and Portable Gas Detec. Systems
CBT 36 questions
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Question 2
After washing and gas-freeing from a toxic cargo, what type of gas detection equipment should you use before entering a cargo tank?- Chemical indicator tubes.
- A tankscope.
- An Explosimeter.
- An infrared gas detector.
Question 3
Cotton filters are sometimes used with hydrocarbon gas detectors. What is their purpose?- To prevent chemical contamination of the sample.
- To remove dust from the sample.
- To remove water from the sample.
- To stop pressure surges in the sample line.
Question 4
For how long must the ventilation of a space be stopped before conducting tests of the atmosphere for an Enclosed Space Entry?- 10 minutes.
- 30 minutes.
- Briefly, while the tests are being carried out.
- The ventilation should be run continuously.
Question 5
How will leaks in the sample pipework affect the operation of a fixed gas detection system?- It will cause failure due to high flow rate.
- It will cause failure due to low suction pressure.
- It will cause lower readings due to dilution of the sample.
- It will cause higher readings due to increased flow rate.
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About this CBT test
TOTS 1A-Fixed and Portable Gas Detec. Systems is a CBT test with 36 questions and verified answers. Common topics include: detection system, oxygen analyser, operational tests, level accuracy, gas, explosimeter, span, detectors.
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