Combustion Worksheet 2 (use BPEC book)

What does the Wobbe number indicate when using a particular gas?

• The heat output from a burner

• The color of the flame

• The pressure of the gas supply

• The amount of gas used

Which two factors primarily affect the heat released from a burner?

• Calorific value and specific gravity

• Gas color and odor

• Pressure and temperature

• Volume and density

Which of the following is NOT one of the four factors affecting heat release from a burner?

• Gas odor

• Calorific value

• Specific gravity

• Injector size

What does Family 3 of gases cover?

• Liquid petroleum gases

• Manufactured gases

• Natural gases

• Inert gases

What are 'flammability limits'?

• Air and gas mixtures at each end of the range which will just burn

• The maximum temperature a gas can reach

• The pressure at which gas is stored

• The color of the gas flame

Who should inspect the gas installation after a carbon monoxide incident?

• A registered gas installer

• The property owner

• A neighbor

• A police officer

What is the main risk of incomplete combustion in domestic gas appliances?

• Production of carbon monoxide

• Increased flame speed

• Lower gas pressure

• Higher calorific value

Which of the following is NOT a symptom of carbon monoxide exposure?

• Blue skin color

• Headache

• Dizziness

• Nausea

What is the first action to take if you suspect carbon monoxide poisoning?

• Vacate the property

• Call a friend

• Open the fridge

• Turn on the heater

What is the effect of undergassing in a combustion process?

• Increases combustion efficiency

• Can cause incomplete combustion

• Reduces soot formation

• Prevents yellow flames