Unvented Safety Controls

What happens to the boiling point of water as the pressure increases?

• It decreases.

• It remains the same.

• It increases.

• It fluctuates.

Why is it important to control the water temperature in an unvented hot water storage vessel?

• To prevent evaporation.

• To maintain atmospheric pressure.

• To ensure safety due to high pressure.

• To enhance taste.

What is the consequence of rising pressure on the boiling point of water?

• It lowers the boiling point.

• It raises the boiling point.

• It has no effect.

• It causes immediate boiling.

What is the purpose of the high limit thermostat in the safety control system?

• To regulate the normal operating temperature

• To cut off energy supply in case of overheating

• To control water flow

• To reduce water pressure

What is the purpose of the control thermostat in the system?

• To regulate the normal operating temperature

• To cut off energy supply

• To reduce water pressure

• To allow water expansion

What type of cylinder is shown in the image?

• Vented cylinder

• Unvented cylinder

• Open cylinder

• Closed cylinder

Why is the temperature/pressure-relief valve important in vessels?

• It increases efficiency

• It prevents overheating

• It decorates the vessel

• It reduces noise

Which component is responsible for adjusting the temperature settings?

• Indirect thermal cut-out

• Thermostat adjustment

• Terminal block

• Cable clamps

What is the primary function of a high limit thermostat in a direct system?

• To prevent overheating

• To increase heating speed

• To reduce energy consumption

• To control water flow

In a direct system, what is the role of the immersion heater?

• To heat the cylinder directly

• To cool the cylinder

• To circulate water

• To filter impurities