New Quiz 1

Can the geyser installation standard, SANS 10254 be read in isolation?

Yes, all necessary info is included in the standard

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No, there are many references to other product and installation standards

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It must be read in conjunction with SANS 10106 and SANS 1352

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What does the term “Back Syphonage” refer to?

Flow of water in a pipe in a direction opposite to the normal direction of flow

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Backflow of water resulting from the negative pressure in a water installation

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A “Dead Leg”, in the context of SANS 10254 refers to

A piece of pipe not connnected to a terminal fitting, but is connected to a water supply, causing stagnation.

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The pipe from the water heater or from a distribution pipe that connects to a terminal fitting in the case of hot water

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There is no such relevant thing within this standard

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What does the term “Backflow” refer to?

Backflow of water resulting from the negative pressure in a water installation

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Flow of water in a pipe in a direction opposite to the normal direction of flow

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What is SANS 151?

Installation standard for heat pump installations

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Installation standard for instantaneous water heaters

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Product standard for pressurised storage tanks

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If a non-return valve is installed on an open outlet type water heater…

It may be installed as a conventional pressurized tank with a PRV, TP and drip tray

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It may be installed as a conventional open-outlet type 0kPa water heater

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When a storage tank is used to supply a HWC

Any type of HWC can be used

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No shut-off valve is required between the supply tank and storage tank

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A closed type water heater with a TP valve must be used

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The TP valve and PRV must be of the same pressure rating, regardless of the rating of the tank

false

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true

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Choose the statement you feel is correct

When working on an existing geyser installation, I only need to make it compliant if it was installed after 2007

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When working on any existing geyser installation, I need to make it compliant regardless of the original installation date

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There is no need to bring the existing installation up to compliance

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Which valves must be installed with and open outlet type water heater?

A shut-off valve on the hot terminal fitting

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A PRV, and shut-off valve

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A NRV and an open vented mixer or a swivel spout and control valve on the cold inlet

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What is the maximum size of a closed type geyser that we as plumbers are allowed to design and install?

300L

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1000L

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450L

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For a closed type hot water cylinder, is a hot outlet with a dropper pipe allowed?

No

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Yes

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Yes, if installed with a baffle

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What is residual dynamic pressure in a balanced reticulation system?

Under zero flow conditions, all teminal points to have the same measured pressure

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It is the pressure within the system under conditions of flow

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Under zero flow conditions the difference in pressure between hot and cold points may not be more than 20%

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The rated capacity of an instantaneous water heater relates to

The total stored amount of hot water in the tank

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The rate of delivery of heated water and a certain temperature in litres per minute

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The total amount of heated water deliverable in an hour

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Everything must be changed to comply with the current standard

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I must determine all non compliance and rectify as many as possible, notifying the owner and user in writing of any that cannot be fixed, and of those that they chose not to rectify

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I can note all non compliances in a notice of non compliance without attempting to rectify the faults

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When working on an existing geyser installation, I only need to make it compliant if it was installed after 2007

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500Kpa

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300Kpa

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100Kpa

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200Kpa

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300Kpa

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500Kpa

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200Kpa

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100Kpa

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200Kpa

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100Kpa

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500Kpa

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300Kpa

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Only if the temperature probe is made of copper

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No, this will change the tank’s compliance to SANS 151

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Yes, it can

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As long as the thermostat is left next to the geyser

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true

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false

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To prevent backflow from occurring on an open outlet type geyser?

An anti-syphon loop must be incorporated

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A flap type NRV should be used

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A spring loaded NRV should be used on the hot water outlet

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A spring loaded NRV should be used on the cold water inlet

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With a PRV

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By tee-ing into the cold water line very close to the geyser

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By drawing cold water from an additional nipple outlet on the cistern

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This shower point cannot be balanced

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On a multi-storey building designed and constructed with cold water storage tanks, the following can be omitted on the geyser installation

The TP valve

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The cold vacuum breaker and riser

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The PRV if the pressure is below the rated pressure of the tank

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The drip tray

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On any water heater

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Only when a water heater is in a ceiling

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On any water heater when leakage from it or the components can cause damage

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Only if it is a steel geyser

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A drip tray overflow

Has to be metallic

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Must comply with the requirements of SANS 10252-2

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Must be no longer than 3.5m

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A drip tray overflow must be at least 50mm in diameter

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A drip tray overflow must be able to discharge at least 40L/min

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A drip tray overflow must be able to discharge at least 30L/min

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A drip tray overflow must be at least 50mm internal diameter

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The minimum fall for a drip tray overflow must be?

1 in 60

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1 in 120

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1 in 100

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1 in 40

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May a drip tray be installed flat?

Yes

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No, it must be sloped to the outlet

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Yes, as long as the sides of the tray are at least 75mm high.

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Because it is not used as an approved system regarding jointing methods

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Because it is too small

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Because of the effects of dissimilar metals

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A,B & C

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What is the maximum allowed length of a 28mm copper TP discharge pipe with three (3) or fewer bends?

3,5m

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6m

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9m

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4m

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What happens to the overall allowable length of pipe of a TP discharge when more than three (3) bends are used?

The total allowable length reduces by 500mm per bend

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The total allowable length reduces by 60mm per bend

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The total allowable length reduces by 600mm per bend

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The total allowable length does not reduce

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If two (2) geysers are installed in series, may the TP discharge pipes be joined together?

Yes

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No

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Only if the size increases to 28mm

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Yes, as long as the bolts used extend at least 120mm

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Yes, as long as the manufacturer approves, and the bolts used are at least 120mm

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This may not be done

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Yes, however there should be extra brackets installed to support the tank from underneath

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The integrated shut-off valve incorporated in a combination PRV may be used as the shut-off valve before the PRV

true

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false

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Design based requirements are ideal to verify?

Product endurance

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Product performance

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Product materials

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Copper fittings and pipes from different manufacturers can be mixed

true

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false

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Plastic pipes undergo testing for UV resistance

true

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false

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Which of these causes of incivility are you avoiding if you choose not to confront a co-worker who has been talking about you behind your back?

Bad communication

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Lack of self-restraint

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Difficult personalities

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Poor schooling

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According to P.M Froni, there is a more philosophical root to incivility. Which of these best describes that root?

Not expressing one's self at all

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Expressing one's self less than what is necessary to address certain things

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Expressing one's self according to how colleagues may like it

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Expressing one’s self in the most authentic way possible is a “right” and an “entitlement”

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Yes or No: Does the company provide instigators with opportunity, if there is nothing keeping employees from posting derogatory emails to co-workers anonymously?

YES

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NO

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Yes or No: Is it possible to overdo political correctness, to the extent that the positive spirit behind it becomes an object of ridiculous

YES

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NO

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Biomass is considered a 100% renewable energy source.

true

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false

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Select THREE PROS of solar energy.

Depends on weather

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Needs only light

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Limited pollution

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High running costs

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Uses existing infrastructure

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What are TWO of the factors that will influence the PAYBACK PERIOD of a solar system?

Hot water usage patterns

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Pressure of the system

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Amount of booster input required

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Temperature settings

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Size of the tank

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Is three years a realistic payback period for a well installed, properly designed domestic solar water heating system?

Yes

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No

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