What is the primary function of fans and pumps in a Building Services Engineering (BSE) system?

• To provide electrical power

• To circulate air and fluids

• To generate heat

• To insulate the building

Which of the following best describes the operational principles of gas and oil burners used in BSE systems?

• They primarily use solar energy

• They convert chemical energy into mechanical energy

• They operate on the principles of condensation

• They use combustion to generate heat

How do heat pumps in BSE systems extract heat?

• From the external air only

• From solar panels

• From low-grade heat sources like the ground and air

• By burning fossil fuels

What is the purpose of understanding the logic of domestic heating controls in BSE systems?

• To improve electrical conductivity

• To enhance the efficiency of heating systems

• To increase the use of renewable energy sources

• To reduce the physical size of the heating units

What is the primary function of centrifugal fans as described in the text?

• To cool the air in domestic settings

• To move air through ducting in both domestic and industrial settings

• To filter pollutants from the air

• To increase air humidity

What happens when the fan impeller of a centrifugal fan is rotated by the fan motor?

• It increases the air temperature

• It decreases the air pressure

• It creates low negative pressure in the chamber

• It purifies the air

Why must the pressure generated by a centrifugal fan be sufficient to overcome the ductwork's resistance?

• To reduce energy consumption

• To minimize noise production

• To deliver the desired quantities of air

• To prevent overheating of the fan

What is noted as a key characteristic of centrifugal fans regarding their operational cost and efficiency?

• They are inexpensive and low efficiency

• They are expensive and low efficiency

• They are inexpensive and high efficiency

• They are expensive but have high operational efficiency and low energy efficiency

What is the structure of the impellers in centrifugal fans designed to do?

• Create a large, positive suction pressure at the inlet

• Create a small, negative suction pressure at the inlet

• Increase the noise level of the fan

• Decrease the efficiency of the fan

How is the motor of a centrifugal fan connected to the fan?

• Through a rigid coupling

• Through a hydraulic coupling

• Through a flexible coupling

• It is not directly connected