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Home » Gas detection quiz

Test your crew's knowledge

Try the gas safety quiz

Ensuring your crew is well-versed in gas safety is crucial for maintaining a safe working environment on board. The quiz will test your team’s knowledge of gas detection, safety procedures, and emergency responses.

Once you have completed the quiz, submit your answers and get both feedback and the quiz as a pdf by email. Good luck!

1/20What is the primary hazard associated with compressed gases on board ships?

Fire and explosion Decreased pressure Physical damage to equipment Corrosion

2/20Which safety devices are essential for monitoring oxygen and carbon dioxide levels when entering a confined space?

Portable and personal gas detectors Emergency breathing apparatus Personal protective equipment (PPE) Fresh calibration gas

3/20What is the primary danger of having too much oxygen in the air?

It can cause suffocation It can make materials more flammable It can cause corrosion on equipment It can reduce visibility

4/20What is the primary difference between a portable gas detector and a personal gas detector?

A portable gas detector is used only for calibration purposes, while a personal gas detector is used for area monitoring A personal gas detector monitors oxygen levels, while a portable gas detector monitors hazardous gases. A portable gas detector monitors gas levels in a specific area, while a personal gas detector monitors the air quality surrounding an individual. A portable gas detector is used to detect smoke, while a personal gas detector is used to detect gases.

5/20Which of the following gases will most likely cause an explosion in a poorly ventilated space?

Nitrogen Hydrogen Helium Oxygen

6/20When storing gas cylinders on board, they should be kept from which of the following?

Ventilation openings Moving machinery High temperatures All of the above

7/20Which of the following gases is most dangerous to workers in an enclosed space due to its colorless and odorless nature?

Nitrogen Hydrogen sulfide Carbon monoxide Methane

8/20What is the purpose of using calibration gas during the calibration of a gas detector?

To measure the gas detector's battery life To verify the accuracy of the sensor's readings To clean the gas detector’s sensors To test the durability of the gas detector

9/20What is the best way to detect gas on board?

Proper use of quality gas detectors Train the crew to listen for gas leaks Sealing all gas lines permanently to prevent leaks Installing smoke detectors in every compartment

10/20Before entering a confined space on board, what should be done with the atmosphere in the space?

It should be ventilated It should be tested for hazardous gases It should be tested for oxygen levels All of the above

11/20What is the primary purpose of a gas detector when entering a confined space?

To track changes in gas pressure over time To detect hazardous gases or oxygen deficiency To monitor the ventilation efficiency To alert when the space becomes overcrowded

12/20What should be done if a personal gas detector goes off in a confined space entry?

Immediately evacuate the space and assess the situation Wait 15 minutes and continue working if the alarm stops Reset the detector and continue working Report the alarm after you have completed your assignment

13/20What is the main function of a gas cylinder regulator?

To measure the temperature of the gas To control the cylinder`s gas flow To store gas at high pressure To release gas at high pressure

14/20What is "head space" in a tank or container?

The area in the tank where the liquid is stored The area where the liquid is pressurized to prevent vaporization The unfilled area between the liquid and the ceiling of the tank The area below the liquid surface where gas bubbles may form

15/20What is the safe minimum oxygen level for humans to avoid oxygen deficiency?

21.0% 18.9% 17.0% 19.5%

16/20What is the purpose of using an inert gas in a cargo tank?

To balance the nitrogen levels of the space To increase the oxygen levels for better breathing To prevent combustion by lowering oxygen levels To calibrate gas detectors before entry

17/20What is the primary risk of having a high concentration of carbon monoxide in an enclosed space?

It can cause explosions It can cause skin burns It can cause respiratory irritation It can cause suffocation

18/20What does the term "bump test" refer to in gas detection?

Comparing gas detector readings to your previous test results Exposing the sensor to a known gas concentration to verify its response A visual inspection of all sensors Dropping the gas detector to the floor to check its robustness

19/20What is the primary purpose of purging (gas-freeing) a confined space?

To cool the space before entry To remove gas from a confined space using ventilation To remove excess water to prevent gas accumulation To prevent the buildup of static electricity in the confined space

20/20Can you use calibration gas after its expiry date?

Yes, it can still be used if the gas container is not damaged Yes, but only if the equipment shows no issues No, expired calibration gas may compromise safety Yes, but only for testing non-critical equipment

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Martin Bruusgaard AS

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