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HW - controls unvent

Authored by Eden Longley

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University

Used 3+ times

HW - controls unvent
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13 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The function of control thermostats used in unvented hot water systems is to:

Regulate the temperature to prevent overheating

Increase the water pressure

Filter impurities from the water

Add minerals to the water

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The function of overheat thermostats (thermal cut-out) used in unvented hot water systems is to:

Prevent overheating by cutting off the power supply when a certain temperature is exceeded.

Increase the water temperature to improve efficiency.

Maintain a constant water temperature regardless of usage.

Provide a backup heating source in case of primary system failure.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The function of temperature relief valves used in unvented hot water systems is to:

Regulate the water temperature

Release excess pressure

Prevent water leakage

Control water flow

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

It decreases

It remains the same

It rises

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Fill in the blank: Water inside the unvented hot water storage vessel is stored above ________ pressure.

atmospheric

normal

standard

ambient

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the temperature range for the control stat in an unvented cylinder?

60-65°C

70-75°C

50-55°C

80-85°C

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the function of the temperature relief valve on an unvented cylinder with internal expansion?

To regulate the temperature of the water

To release excess pressure and prevent overheating

To control the flow of water into the cylinder

To measure the temperature of the water

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