Combustible gas and detectors

Combustible gas is a typical cause of gas explosion accidents

• True

• False

_________ is not an example of combustible gases

• Methane

• Iso-Butane

• Sarin

• Hydrogen Sulphide

The _______ concentration of combustible gas mixed with air that can explode when is ignited is called Lower Explosive Limit (LEL).

• Highest

• Lowest

• Middle

• Diluted

Higher Explosive Limit is defined for highest concentration of combustible mixed with air that can explode when is ignited.

• False

• True

The range between LEL and UEL is known as the ________ for that gas or vapor.

• Explosive range

• Combustible limit

• Combustible range

• Explosive limit

Cosmos XP-3110 cannot detect

• Methane

• Hydrogen

• Iso-Butane

• Chemical gases

What is the LEL level (%) for Methane?

• 4%

• 5%

• 4.5%

• 3%

What is the LEL level (%) for Hydrogen?

• 1.8%

• 2%

• 4%

• 6%

What is the LEL level (%) for Iso-Butane?

• 2.5%

• 1.8%

• 3%

• 7%

Ventis Pro is a _________

• Single gas detector

• Double gas detector

• Multiple gas detector

• Chemical detector