9189 Phase 4 Ventilation

What is required for complete combustion when natural gas is burned?

• Hydrogen

• Oxygen

• Nitrogen

• Carbon Dioxide

What is the British Standard that provides guidance on ventilation for gas appliances of rated input not exceeding 70kW?

• BS 5440

• BS 1234

• BS 6789

• BS 4321

Ventilation is required to dissipate heat and provide cooling for appliances contained within ________.

• rooms

• compartments

• buildings

• halls

Fill in the blank: Ventilation is required for ______ appliances located in a compartment.

• Open-flue

• Electric

• Solar

• Battery-operated

Which of the following is a type of ventilation provided for an appliance to aid combustion and heat dissipation?

• Adventitious ventilation

• Permanent ventilation

• Compartment ventilation

_____ ventilation is provided to enable the required air changes within a building, to meet the building regulations.

• Permanent

• Adventitious

• Compartment

What is 'adventitious ventilation'?

• A method to increase heating

• Draughts admitted from outside through gaps

• A type of air conditioning

• A method to reduce noise

Adventitious ventilation equates to about ____ of free air.

• 20cm²

• 35cm²

• 50cm²

• 70cm²

What is the required free area for each kW (net) of gas used when calculating ventilation for a gas appliance?

• 3cm²

• 5cm²

• 7cm²

• 9cm²

What is the purpose of vents located on an appliance compartment?

• To provide air for complete combustion and appliance cooling

• To increase the temperature of the appliance

• To reduce the noise of the appliance

• To enhance the appearance of the appliance.