
9189PH2CHPPT8

Quiz
•
Physics
•
12th Grade
•
Hard

William Heron
FREE Resource
23 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary purpose of a pressure relief valve in a plumbing system?
To increase water pressure
To protect against over-pressurisation of the water
To reduce water temperature
To filter impurities.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pressure relief valves are usually set to ___ bar pressure.
1
2
3
4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is one reason why a pressure relief valve might open?
The diaphragm in the expansion vessel has ruptured
The vessel is overfilled with air
The discharge pipework is plastic
The system is too cold.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Fill in the blank: Pressure relief valves are most likely to open because of a lack of room in the system for expansion, due to a malfunction with the ________.
discharge pipework
expansion vessel
heating element
water supply
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary function of an Automatic Air Vent (AAV) in a heating system?
To increase water pressure
To release trapped air
To heat the water
To cool the system.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trapped air within heating systems can cause several problems. Which of the following is NOT one of them?
A) Air leads to corrosion
B) Lack of circulation through airlocks
C) Air in radiators leads to inefficiency
D) Decreased water temperature.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary function of a mechanical cylinder thermostat?
To control the temperature of a hot water cylinder
To increase water pressure
To filter impurities
To reduce noise
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