Unit 311 Sanitation systems full unit review

​Sanitation systems

​Click on the link below and answer the questions that follow:

The_City_and_Guilds_Textbook_Plumbing_Book_1_for_t..._----_(9_Sanitation_systems).pdf

Multiple Choice

What is the purpose of sanitation systems as described in the introduction?

• To direct waste safely away from homes

• To increase water pressure in homes

• To provide heating solutions

• To enhance the aesthetic of urban areas

Multiple Choice

Which of the following is NOT a type of sanitary pipework system mentioned in the text?

• Primary ventilated stack system

• Ventilated branch discharge system

• Secondary ventilated stack system

• Central heating system

Multiple Choice

What are the two sections of all sanitary systems?

• The soil pipe and the vent pipe

• The water pipe and the gas pipe

• The heating pipe and the cooling pipe

• The drainage pipe and the supply pipe

Multiple Choice

What is the function of the vent pipe in a sanitary system?

• To introduce air into the system to prevent loss of trap seal

• To carry waste away from the building

• To supply water to the building

• To provide heating to the building

Multiple Choice

What is the purpose of a water trap in sanitary systems according to the Building Regulations?

• To allow foul air to enter the building

• To prevent foul air from entering the building

• To increase water pressure

• To reduce water usage

Multiple Choice

What is the minimum water seal depth required in the trap after an appliance has been used, as per Document H?

• 10 mm

• 15 mm

• 25 mm

• 50 mm

Multiple Choice

What is the primary ventilated stack system used for in domestic dwellings?

• To increase water pressure

• To limit pressure fluctuations without a separate ventilating stack

• To reduce water usage

• To enhance heating efficiency

Multiple Choice

What is the maximum length for a waste pipe connected to a washbasin and bidet?

• 3 meters

• 4 meters

• 1.7 meters

• 6 meters

Multiple Choice

What is the gradient range for a washbasin and bidet with a maximum length of 1.7 meters?

• 10–15 mm/m

• 18–22 mm/m

• 25–30 mm/m

• 5–10 mm/m

Multiple Choice

According to the table, what is the trap seal depth for a WC branch?

• 75 mm

• 50 mm

• 100 mm

• 25 mm

Multiple Choice

For systems up to five storeys high, what is the minimum distance between the lowest branch connections and the invert of the drain?

• 500 mm

• 450 mm

• 750 mm

• 1000 mm

Multiple Choice

What is the minimum radius for bends at the base of discharge stacks?

• 100 mm

• 150 mm

• 200 mm

• 250 mm

Multiple Choice

What problem can tight bends in plumbing cause?

• Increased water flow

• Compression

• Reduced air pressure

• Enhanced drainage

Multiple Choice

What is the recommended alternative to a large-radius bend?

• 30° bend

• 60° bend

• 90° bend

• Two 45° bends

Multiple Choice

What should be avoided in the wet part of the stack if possible?

• Large-radius bends

• Off-sets

• Ventilation

• Compression

Multiple Choice

What is the maximum angle at which branch pipe connections of less than 75 mm should be made?

• 30°

• 45°

• 60°

• 90°

Multiple Choice

What is the minimum bend radius required for branch connection pipes of over 75 mm diameter?

• 25 mm

• 35 mm

• 50 mm

• 75 mm

Multiple Choice

What is the consequence of a branch pipe discharging into a stack improperly?

• Increased water pressure

• Loss of trap seal

• Faster drainage

• Reduced pipe diameter

Multiple Choice

In Figure 9.6, what is the maximum diameter for a small branch in the opposing waste pipes diagram?

• 50 mm

• 75 mm

• 82 mm

• 100 mm

Multiple Choice

What is the restricted distance for a branch connection on a stack up to 82 mm in diameter?

• 90 mm

• 110 mm

• 200 mm

• 250 mm

Multiple Choice

If a branch connection into a stack is between 82 mm and 160 mm in diameter, what is the required distance for no other connection to be installed opposite?

• 100 mm

• 150 mm

• 200 mm

• 250 mm

Multiple Choice

What type of system is used when each waste pipe branch is separately ventilated?

• Primary ventilated stack system

• Ventilated branch discharge system

• Directly ventilated stack system

• Main discharge stack system

Multiple Choice

What is the restricted distance for a branch connection on a stack up to 160 mm in diameter?

• 90 mm

• 110 mm

• 200 mm

• 250 mm

Multiple Choice

Diagram of a ventilated branch discharge system showing main ventilating stack, branch ventilating pipe, rodding eye, and branch discharge pipe.

• Main ventilating stack

• Branch ventilating pipe

• Rodding eye

• Branch discharge pipe

Multiple Choice

What is the purpose of ventilating the discharge branch in a ventilated branch discharge system?

• To increase water flow

• To safeguard against trap seal loss

• To reduce pipe length

• To enhance air quality

Multiple Choice

What is the minimum size for a ventilating pipe serving a single appliance?

• 15 mm

• 25 mm

• 32 mm

• 75 mm

Multiple Choice

What is the minimum size for the main ventilation stack?

• 15 mm

• 25 mm

• 32 mm

• 75 mm

Multiple Choice

When must a branch ventilating pipe be 32 mm in size?

• When it serves a single appliance

• When it is longer than 15 m

• When it is shorter than 15 m

• When it is connected to the main stack

Multiple Choice

What is the maximum height for the connection from the invert of the drain to the highest connection of an appliance to the stack in Scotland?

• 1.3 m

• 1.5 m

• 2 m

• 3 m

Multiple Choice

What is the maximum distance for a single appliance connection to the stub stack?

• 3 m

• 6 m

• 9 m

• 12 m

Multiple Choice

What type of valve is used for the ventilation of a stub stack?

• Pressure relief valve

• Air admittance valve

• Check valve

• Ball valve

Multiple Choice

What is the primary function of an air admittance valve?

• To increase water pressure in pipes

• To prevent the loss of trap seals

• To heat the air in the stack

• To filter impurities from the air

Multiple Choice

Where should air admittance valves be fitted to minimize the risk of freezing?

• In a living room

• In a non-inhabited space like a roof space

• In a basement

• In a bathroom

Multiple Choice

How many domestic properties of no more than three storeys high can be ventilated using air admittance valves?

• Up to two properties

• Up to four properties

• Up to six properties

• Up to eight properties

Multiple Choice

What is the minimum height a ventilation stack should be installed above an opening window if it is within 3 meters of the window?

• 500 mm

• 900 mm

• 1200 mm

• 1500 mm

Multiple Choice

Why should a cage be fitted to the top of the vent pipe?

• To increase air supply

• To prevent birds from nesting

• To reduce noise

• To improve water flow

Multiple Choice

What is the purpose of fitting a vent cowl in exposed or windy positions?

• To enhance the aesthetic

• To prevent 'wavering out'

• To increase water pressure

• To reduce installation costs

Multiple Choice

When installing a soil stack for waste pipes only, what should be the size of the stack?

• Smaller than the smallest trap

• Equal to the largest trap

• Larger than the largest trap

• Equal to the smallest trap

Multiple Choice

What is one condition for waste pipes to discharge over a gulley?

• The gulley must be connected to a rainwater drain.

• The waste pipe discharges above the gulley grate.

• The waste pipe discharges below the gulley grate but above the water level in the trap.

• Appliances connected to the gulley may use a trap with a 50 mm trap seal.

Multiple Choice

What is one purpose of sanitary appliances?

• To maintain personal hygiene by washing, bathing, or showering.

• To increase the water pressure in pipes.

• To reduce the temperature of hot water.

• To enhance the aesthetic appeal of bathrooms.

Multiple Choice

What is a characteristic of glazed vitreous china?

• It is highly resistant to vandalism.

• It is stain-proof, burn-proof, rot-proof, and non-fading.

• It is made from 304- or 316-grade stainless steel.

• It is usually fitted where the general public has access.

Multiple Choice

What standard is stainless steel made to for sanitary appliances?

• BS 3402:1969

• EN 10088–2

• ISO 9001

• ASTM A240

Multiple Choice

Which material is usually manufactured by injection moulding techniques?

• Fireclay

• High-impact plastic

• Acrylic

• Porcelain enamelled pressed steel

Multiple Choice

What is a characteristic of acrylic baths?

• Very heavy and cold to the touch

• Easily damaged by scratching and abrasive cleaners

• Made from buff-coloured ball clays

• Extremely robust but very heavy

Multiple Choice

What is a disadvantage of enamelled cast iron?

• It is porous

• It is very heavy and cold to the touch

• It is easily damaged

• It is lightweight

Multiple Choice

What is the most common type of WC fitted in the UK?

• Vacuum forming type

• Wash down type

• Enamelled type

• Acrylic type

Multiple Choice

What is the main function of the siphonic type flushing operation?

• To increase water pressure

• To create a vacuum for clearing the pan

• To reduce water usage

• To enhance the design of the pan

Multiple Choice

Which type of WC pan is usually installed only on replacements due to its outdated design?

• Double trap siphonic WC pan

• Single trap siphonic WC pan

• Pressure-assisted WC pan

• Gravity-fed WC pan

Multiple Choice

What is a special feature of the double trap siphonic WC pan?

• It has a lower outlet

• It uses more water

• It has an unrestricted outlet and two water traps

• It is louder than other pans

Multiple Choice

What principle does the aspirator in a double trap siphonic WC pan follow?

• Newton's third law

• Bernoulli’s principle

• Archimedes' principle

• Pascal's law

Multiple Choice

Diagram of a wash down WC pan showing flush pipe and water levels.

• Diagram of a wash down WC pan showing flush pipe and water levels.

• Diagram of a wash down WC pan without flush pipe and water levels.

• Diagram of a wash down WC pan showing only the flush pipe.

• Diagram of a wash down WC pan showing only the water levels.

Multiple Choice

What is a characteristic of a close coupled WC pan?

• The cistern is separate from the pan.

• The cistern is bolted to the back of the pan.

• The flush pipe is very long.

• The pan is designed to be wall-mounted.

Multiple Choice

How is the cistern connected to the WC pan in a low level style?

• By a long flush pipe.

• By a short flush pipe.

• Directly without a pipe.

• By a flexible hose.

Multiple Choice

What is a characteristic of a high-level WC system?

• The flush pipe is shorter and the cistern is at a low level.

• The flush pipe is much longer and the cistern is at a high level.

• The WC pan is hung on the wall.

• The cistern is concealed behind a panel.

Multiple Choice

What is a feature of a back to wall/concealed WC system?

• The WC pan is hung on the wall.

• The cistern is at a high level.

• The cistern is concealed in a cabinet or behind a panel.

• The flush pipe is much longer.

Multiple Choice

How are most WC pans manufactured today?

• With an 'S' trap configuration.

• With a 'P' trap configuration.

• With a concealed cistern.

• With a high-level flush pipe.

Multiple Choice

What was the flush volume of WC cisterns prior to 1986 regulations?

• 7.5 litres

• 8 litres

• 9 litres

• 10 litres

Multiple Choice

What is the traditional way to flush a WC cistern?

• By the use of a siphon

• By the use of a dual flush valve

• By the use of a drop valve

• By the use of a float valve

Multiple Choice

How does a dual flush valve operate?

• By lifting a plunger in the siphon bell

• By pressing a button on the top of the WC cistern

• By using a float-operated valve

• By adjusting the height of the siphon bell

Multiple Choice

What is the function of a drop valve in a WC cistern?

• It uses siphonic action to flush

• It allows water to flow by gravity

• It requires a separate overflow pipe

• It uses a diaphragm to lift water

Multiple Choice

What type of valve is used to control the water in a cistern according to the document?

• Float-operated valve

• Pressure-operated valve

• Manual valve

• Electric valve

Multiple Choice

What is the purpose of a service valve in a cistern system?

• To increase water pressure

• To allow maintenance without shutting off the main supply

• To heat the water

• To filter the water

Multiple Choice

Which material is NOT mentioned as being used for WC cisterns?

• Vitreous china

• Plastic

• Glass

• Hard rubber

Multiple Choice

How high should washbasins be installed from the floor to the front lip of the basin?

• 600 mm

• 700 mm

• 800 mm

• 900 mm

Multiple Choice

What is a characteristic of wall-hung washbasins?

• Mounted on a pedestal

• Mounted on well-fixed brackets

• Placed on the floor

• Built into a countertop

Multiple Choice

What is a feature of semi-pedestal washbasins?

• They are mounted directly to the wall

• They do not carry the weight of the basin

• They are inset into a countertop

• They are made of glass

Multiple Choice

What is a characteristic of a semi-countertop style washbasin?

• It is fully recessed into the work surface.

• It sits half on and half off a work surface.

• It is mounted under a work surface.

• It is designed to be supported by a cabinet.

Multiple Choice

Which material is NOT mentioned as a possible material for washbasins?

• Vitreous china

• Stainless steel

• Porcelain enamelled pressed steel

• Wood

Multiple Choice

What is the typical mounting surface for vessel washbasins?

• Under a work surface

• On a worktop or cabinet

• Half on and half off a work surface

• Fully recessed into the work surface

Multiple Choice

What is the main purpose of a one tap hole basin with a monobloc mixer tap?

• To use with hot and cold ½-inch BSP pillar taps

• To use with wall-mounted bib taps

• Specifically designed for use with a monobloc mixer tap

• To connect secretly below the washbasin

Multiple Choice

Which tap hole arrangement is becoming more popular for bespoke bathrooms?

• One tap hole basin with monobloc mixer tap

• Two tap hole basin with hot and cold taps

• Three tap hole basin with remote mixer tap

• No tap hole basin with wall-mounted taps

Multiple Choice

What is the traditional tap hole arrangement for use with hot and cold taps?

• One tap hole basin with monobloc mixer tap

• Two tap hole basin with hot and cold taps

• Three tap hole basin with remote mixer tap

• No tap hole basin with wall-mounted taps

Multiple Choice

What is the purpose of the slots in the waste of a slotted waste, plug, and chain?

• To prevent water from flowing down the trap

• To allow water to find its way safely down to the trap

• To connect the waste to the basin

• To secure the nut and the basin

Multiple Choice

What is a pop-up waste typically designed as part of?

• A shower head

• A toilet seat

• A tap

• A bidet

Multiple Choice

What is another name for a bidet, as mentioned in the text?

• Sit-on washbasin

• Stand-up shower

• Floor sink

• Wall basin

Multiple Choice

Which type of bidet is most common according to the text?

• Ascending spray bidet

• Over-rim bidet

• Wall-hung bidet

• Floor-mounted bidet

Multiple Choice

What is a special feature of the ascending spray bidet?

• It has a built-in heater

• It discharges water upwards

• It is made of stainless steel

• It has a detachable seat