1) Water is heated on demand to one specific draw-off point area​ a) double check valve b) 150mm + 40mm per meter of head c) Localised d) immersion heaters 2) A cylinder of water is heated to temperature before being distributed to the hot water outlet.​ a) immersion heaters b) twin coil cylinder c) SEDBUK d) centralised 3) A hot water cylinder does not have any form of heat exchanger coil a) Direct open vented system​ b) temperature stratification.​ c) 450mm d) single check valve 4) A hot water cylinder has an internal coil, which acts as the heat exchanger to heat the stored water. ​ a) Back flow b) Indirect open vented system​ c) ​combination boiler d) building regulation part g 5) What is the minimum size pipe of the cold feed and open vent a) ​22mm b) Back Syphonage c) building regulation part g d) Localised 6) When there is a temperature difference between the top and bottom on the cylinder a) Instantaneous hot water systems​ b) ​combination boiler c) ​part l building regulation d) temperature stratification.​ 7) What states the capacity of the CWSC feeding a hot water cylinder should be at least the capacity of the cylinder.​ a) Instantaneous hot water systems​ b) SEDBUK c) ​BS EN 806 recommends  d) Back Syphonage 8) A system that operates under mains pressure, so they are known as a high pressure systems a) 450mm b) 18 litre c) Unvented hot water cylinders​ d) Direct open vented system​ 9) They work on the principle of heating the domestic hot water only when it is needed. a) 30 seconds b) ​part l building regulation c) Instantaneous hot water systems​ d) Unvented hot water cylinders​ 10) A system designed to heat up cold mains water instantaneously centrally located to supply the whole of a property with hot water. a) ​combination boiler b) 150mm + 40mm per meter of head c) SEDBUK d) passive dead leg 11) What size are Feed and Expansion cistern that maintain the water level in the primaries via a feed pipe to the primary return a) 18 litre b) Back Syphonage c) building regulation part g d) ​air gaps 12) What are the potential sizes of a CWSC supplies the cylinder via the cold feed pipe. feed there is a gate valve located for isolation.​ a) bs8000 pt15 b) 115 or 230 litre c) Instantaneous hot water systems​ d) ​BS EN 806 recommends  13) A pre-plumbed unit in which the cylinder and cold water storage cistern are joined together. a) ​air gaps b) building regulation part g c) 150mm + 40mm per meter of head d) open vented combination units 14) If the hot water system is changed to incorporate a renewable or alternative heat source, a new cylinder with an additional coil in the cylinder will be required. a) immersion heaters b) ​air gaps c) temperature stratification.​ d) twin coil cylinder 15) Conservation of fuel and power a) cylinder thermostat b) Indirect open vented system​ c) Building regulation ​part L d) Direct open vented system​ 16) They require a reset button or a cut off device, rated at 3kw, with length of 27 inch or 11 inch  a) 450mm b) immersion heaters c) single check valve d) centralised 17) This is placed one-third of the way up. When the water is up to temperature, this operates the motorised valve and stops the primary water from circulating through the coil. in a cylinder. a) cylinder thermostat b) ​combination boiler c) open vented combination units d) Instantaneous hot water systems​ 18) What law states Hot water delivered to a bath should not exceed 48C. This is accomplished by using a Thermostatic Mixing Valve AKA blending valve. (Shower valves are now fitted with a safety stop set at 38C.)​ a) Building Regulation part G b) passive dead leg c) 30 seconds d) 115 or 230 litre 19) In temperatures between 20C-46C which bacteria will grow?, 47C or more will kill this bacteria a) passive dead leg b) Legionella c) cylinder thermostat d) temperature stratification.​ 20) What is the acronym Seasonal Efficiency of a Domestic Boiler in the UK? a) 30 seconds b) Legionella c) ​BS EN 806 recommends  d) SEDBUK 21) This helps to prevent one pipe circulation which causes loss of heat and a waste of energy. Also the slight rise in the pipe allows for any air to migrate up towards the open vent a) Back Syphonage b) twin coil cylinder c) 450mm d) bs8000 pt15 22) This is the pipe height formula of the open vent pipe on a hot water cylinder. a) Legionella b) temperature stratification.​ c) Instantaneous hot water systems​ d) 150mm + 40mm per meter of head 23) This is a section of pipework through which water cannot be drawn off or flow. ​ a) passive dead leg b) ​combination boiler c) temperature stratification.​ d) 115 or 230 litre 24) What is it called when water is allowed to flow in the opposite direction to which it is designed to travel.​ a) passive dead leg b) 30 seconds c) Back flow d) immersion heaters 25) What is it called when water is drawn back out of an appliance due to negative pressure (sucking).​ a) Back flow b) Back Syphonage c) ​combination boiler d) temperature stratification.​ 26) A mechanical device used to protect category 1 water from category 2 (wholesome water from hot water or CWSC) a) centralised b) passive dead leg c) single check valve d) twin coil cylinder 27) A mechanical device used to protect category 1 water from category 3​ (wholesome water from a filling loop on a combi boiler) a) SEDBUK b) double check valve c) single check valve d) Back flow 28) What must protect category 1 water from category 5​ (Protecting wholesome water from foul water a) 18 litre b) centralised c) ​air gaps d) cylinder thermostat 29) What regulation states that a hot pipe should be installed above the cold pipe, and if there is any possibility of heat transfer the pipes should be insulated.​ a) ​part l building regulation b) Localised c) bs8000 pt15 d) open vented combination units 30) Water Regulations recommend that the temperature at a terminal fitting must not be less than 50C in what amount of time? a) bs8000 pt15 b) 30 seconds c) single check valve d) Instantaneous hot water systems​

Hot water 8202-25

โดย
ฝัง

ลีดเดอร์บอร์ด

สไตล์ภาพ

ตัวเลือก

สลับแม่แบบ

คืนค่าการบันทึกอัตโนมัติ: ใช่ไหม