Question 1

What is the primary purpose of a gravity-fed domestic heating system?

Accepted Answer

To circulate hot water using gravity

Answer

To heat water using electricity

Answer

To provide instant hot water

Answer

To cool water before distribution

Question 2

Which type of pipe is commonly used for domestic hot water systems?

Accepted Answer

Copper pipe

Answer

PVC pipe

Answer

Cast iron pipe

Answer

Galvanized steel pipe

Question 3

What is the purpose of a radiator in a heating system?

Accepted Answer

To emit heat into a room

Answer

To filter impurities from water

Answer

To cool the water

Answer

To store water

Question 4

What safety device is typically installed in a domestic heating system to prevent overpressure?

Accepted Answer

Pressure relief valve

Answer

Check valve

Answer

Thermostat

Answer

Expansion tank

Question 5

Which of the following is a common method of joining copper pipes in plumbing installations?

Accepted Answer

Soldering

Answer

Welding

Answer

Screwing

Answer

Gluing

Question 6

What is the typical function of a thermostatic valve in a heating system?

Accepted Answer

To regulate the temperature of the water

Answer

To increase water pressure

Answer

To filter air from the system

Answer

To provide additional water supply

Question 7

What does the term 'Btuh' stand for in heating systems?

Accepted Answer

British thermal units per hour

Answer

Bureau of technical usage per hour

Answer

British temperature units per hour

Answer

British transmission units per hour

Question 8

What is the main purpose of an expansion tank in a heating system?

Accepted Answer

To absorb excess pressure from thermal expansion

Answer

To filter contaminants from the water

Answer

To provide a backup water supply

Answer

To increase water flow rate

Question 9

What does a zone valve do in a heating system?

Accepted Answer

Controls the flow of water to different areas

Answer

Filters contaminants in the water

Answer

Increases water temperature

Answer

Provides emergency water supply

Question 10

What is the recommended minimum slope for a drainage pipe to ensure proper flow?

Accepted Answer

1/4 inch per foot

Answer

1/2 inch per foot

Answer

1 inch per foot

Answer

1/8 inch per foot

Question 11

What is the purpose of a benched waste in plumbing?

Accepted Answer

To ensure proper drainage flow by directing waste to the main drain

Answer

To prevent water from freezing in the pipes

Answer

To support the sink during installation

Answer

To allow for easy cleaning of the pipes

Question 12

Which type of pipe is commonly used for hot water distribution in domestic systems?

Accepted Answer

Cross-linked polyethylene (PEX)

Answer

Cast iron

Answer

Copper

Answer

PVC

Question 13

What is the primary function of a thermostatic mixing valve in a plumbing system?

Accepted Answer

To maintain a consistent water temperature by mixing hot and cold water

Answer

To increase water pressure in the system

Answer

To prevent backflow in the water supply

Answer

To filter impurities from the water

Question 14

What is the primary purpose of a pressure relief valve in a heating system?

Accepted Answer

To prevent excess pressure from causing system failure

Answer

To regulate the temperature of the water

Answer

To filter debris from the water supply

Answer

To increase the flow rate of water

Question 15

What is the purpose of installing an expansion vessel in a sealed heating system?

Accepted Answer

To absorb excess pressure and accommodate the expansion of water when heated

Answer

To increase the flow rate of hot water

Answer

To provide a backup water supply in case of failure

Answer

To filter out impurities from the water

Question 16

What is the recommended slope for drainage pipes to ensure proper flow?

Accepted Answer

1:40

Answer

1:100

Answer

1:50

Answer

1:30

Question 17

What is the function of a drain trap in plumbing systems?

Accepted Answer

To prevent sewer gases from entering the building

Answer

To increase water pressure in the system

Answer

To collect and store excess water

Answer

To filter water contaminants

Question 18

What type of fitting is typically used to connect pipes at a 90-degree angle?

Accepted Answer

Elbow fitting

Answer

Tee fitting

Answer

Union

Answer

Coupling

Question 19

What is the purpose of a vent pipe in a plumbing system?

Accepted Answer

To allow air to enter the system and prevent vacuum formation

Answer

To increase water pressure in the pipes

Answer

To drain excess water from the system

Answer

To filter clean water before it reaches taps

Question 20

What is the primary purpose of a heating system's expansion vessel?

Accepted Answer

To accommodate the increase in water volume as it heats up

Answer

To provide a backup water supply

Answer

To increase water pressure in the system

Answer

To filter impurities from the water

Question 21

What is the standard diameter of a copper pipe used for domestic hot water services?

Accepted Answer

22 mm

Answer

15 mm

Answer

35 mm

Answer

28 mm

Question 22

Which of the following is a common method for joining plastic pipes in plumbing installations?

Accepted Answer

Solvent welding

Answer

Soldering

Answer

Brazing

Answer

Mechanical joining

Question 23

What is the purpose of a radiator in a central heating system?

Accepted Answer

To transfer heat from hot water to the room air

Answer

To create pressure in the system

Answer

To store cold water

Answer

To filter the heating fluid

Question 24

What is the recommended minimum slope for a drainage pipe to ensure proper flow?

Accepted Answer

1:40

Answer

1:30

Answer

1:100

Answer

1:20

Question 25

What safety device is commonly used to prevent backflow in potable water systems?

Accepted Answer

Check valve

Answer

Pressure relief valve

Answer

Expansion vessel

Answer

Thermostatic valve

Question 26

What type of heating system uses a boiler to heat water that is then circulated through pipes?

Accepted Answer

Wet central heating system

Answer

Electric radiators

Answer

Storage heaters

Answer

Cold air systems

Question 27

What is the recommended height for the installation of a kitchen sink for ergonomic use?

Accepted Answer

Between 36 to 40 inches

Answer

42 to 44 inches

Answer

30 to 32 inches

Answer

28 to 30 inches

Question 28

What is the key advantage of using a combination boiler in a heating system?

Accepted Answer

It provides both heating and hot water on demand

Answer

It requires no electricity to operate

Answer

It has a longer lifespan than traditional boilers

Answer

It is larger and holds more water

Question 29

Which tool is primarily used for cutting copper pipes in plumbing installations?

Accepted Answer

Pipe cutter

Answer

Hacksaw

Answer

Screwdriver

Answer

Wrench

Question 30

Which type of pipe is commonly used for hot water supply in domestic heating systems?

Accepted Answer

Copper pipe

Answer

Polypropylene pipe

Answer

PVC pipe

Answer

Galvanized steel pipe

Question 31

What is the function of a thermostatic radiator valve (TRV) in a heating system?

Accepted Answer

To control the temperature in individual rooms

Answer

To increase water flow rate

Answer

To remove air from the system

Answer

To equalize pressure throughout the system

Question 32

What is the purpose of insulation on heating pipes?

Accepted Answer

To reduce heat loss

Answer

To prevent pipe corrosion

Answer

To enhance water taste

Answer

To increase water temperature

Question 33

What is the primary purpose of installing a pressure relief valve in a heating system?

Accepted Answer

To prevent excess pressure buildup

Answer

To filter out impurities

Answer

To promote water circulation

Answer

To regulate water temperature

Question 34

Which material is NOT commonly used for radiator pipework in domestic heating systems?

Accepted Answer

Concrete

Answer

Steel

Answer

Plastic

Answer

Copper

Question 35

What is the recommended maximum distance between support brackets for copper pipes in a domestic heating system?

Accepted Answer

1.5 meters

Answer

0.5 meters

Answer

1.0 meters

Answer

2.0 meters

Question 36

Which type of valve is typically used for isolating water flow in a heating system?

Accepted Answer

Gate valve

Answer

Pressure relief valve

Answer

Check valve

Answer

Ball valve

Question 37

What is the main advantage of using cross-linked polyethylene (PEX) for domestic heating installations?

Accepted Answer

Flexibility and resistance to scale buildup

Answer

Lower cost than copper

Answer

Reduced installation time

Answer

Higher thermal conductivity

Question 38

Which of the following is a common method for connecting pipes in a plumbing installation?

Accepted Answer

Soldering

Answer

Welding

Answer

Screwing

Answer

Clamping

Question 39

What is the purpose of a pump in a domestic heating system?

Accepted Answer

To circulate water throughout the system

Answer

To increase water pressure for showers

Answer

To regulate the temperature of the water

Answer

To filter impurities from the water

Question 40

What is the purpose of a drain valve in a heating system?

Accepted Answer

To allow for the removal of water from the system

Answer

To circulate hot water in the system

Answer

To filter impurities from the water

Answer

To increase pressure in the pipes

Question 41

What is the primary reason for using a pipe bending tool in plumbing?

Accepted Answer

To create smooth bends without kinking the pipe

Answer

To cut the pipe to size

Answer

To measure the length of the pipe

Answer

To join two pipes together

Question 42

What is the purpose of a thermostatic valve in a heating system?

Accepted Answer

To regulate the temperature in a room

Answer

To remove air from the system

Answer

To connect different pipe sizes

Answer

To increase water flow

Question 43

What is a common sign of a leak in a plumbing system?

Accepted Answer

Water stains on walls or ceilings

Answer

Noisy pipes when water is used

Answer

Increased water pressure

Answer

Hot water from cold taps

Question 44

What does the term 'hydronic heating' refer to?

Accepted Answer

Heating that uses water to transfer heat

Answer

Heating that uses electric coils

Answer

Heating that uses air ducts

Answer

Heating that uses steam only

Question 45

Which component is responsible for transferring heat from the boiler to the water in a heating system?

Accepted Answer

Heat exchanger

Answer

Expansion tank

Answer

Circuit breaker

Answer

Thermostat

Question 46

What is the main advantage of using plastic pipes in plumbing installations?

Accepted Answer

Lightweight and corrosion-resistant

Answer

More expensive than metal pipes

Answer

Heavier than copper pipes

Answer

Conducts heat better than metal pipes

Question 47

What is the function of a circulation pump in a domestic heating system?

Accepted Answer

To move hot water through the heating system

Answer

To provide emergency heating

Answer

To filter dirt from the water

Answer

To regulate water temperature

Question 48

Which material is generally NOT recommended for underground heating system pipework?

Accepted Answer

PVC

Answer

Polyethylene

Answer

PEX

Answer

Copper

Question 49

What should be checked before installing a new radiator in a heating system?

Accepted Answer

System compatibility and pressure

Answer

Color of the radiator

Answer

Length of the pipes

Answer

Weight of the radiator

Question 50

Which fitting would you use to connect two pipes of different diameters in a plumbing installation?

Accepted Answer

Reducer

Answer

Tee

Answer

Elbow

Answer

Coupling

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