Nea Exam Test Bank (140 Questions) Answered Correctly Set To Score A+

NEA EXAM TEST BANK (140 QUESTIONS) ANSWERED CORRECTLY SET TO SCORE A+ Renewable Heat Incentive (RHI) - Answer-Government scheme to encourage uptake of renewable heat technologies, cash payments are made quarterly over seven years RHI qualifying technologies - Answer-- Biomass (wood fuelled) boilers - biomass pellet stoves with integrated boilers providing space heating - biomass 'cooker stoves' - ground to water source heat pumps, air to water heat pumps, solar thermal hot water (flat plate or evacuated tube only) Standard Assessment Procedure for energy Rating of Dwellings (SAP) - Answer-UK national methodology for calculation of the energy performance of buildings. Calculation based on energy balance. Factors that contribute energy balance (SAP) - Answer-- Energy efficiency - Materials used got construction of the dwelling - Thermal insulation of the building fabric - Ventilation characteristics of the dwelling and ventilation equipment - Efficiency and control of heating system(s) - Solar gains through openings in the dwelling - Fuel used to provide space and water heating, ventilation and lighting - Energy for space cooling, if applicable - Renewable energy technologies Percentages of heat loss in the home - Answer-Roof - 25% Windows - 10% Floor - 15% Draughts - 15% Walls - 35% Fabric heat loss - Answer-Heat moving through a building, through conduction to a colder area Factors effecting fabric heat loss - Answer-- Area of structure - the greater the area exposed to the outside (external walls) the more chances there are for heat to travel outwards. Large windows, an exposed rood, the floor and damp areas conduct heat more readily - Temperature difference: when there is a big temperature difference between inside and outside of a house, the rate of heat loss is greater. - Insulation properties (U-Values): a scientific value given to building materials and is a measure of its ability to keep heat in. ventilation heat loss - Answer-Occurs through gaps in fabric of building which result in draughts Uncontrolled ventilations takes form in: - Answer-- Gaps around: floors, doors, window frames, roofs and ceilings - Unused chimneys - Holes where pipes and wiring are fitted Factors affecting ventilation heat loss - Answer-- Number and surface of external walls - Location/exposure (high-rise blocks, no shelter) - North facing elevations - Exposed floors - Cold bridging - Building construction methods - Large windows - Poor levels of insulation - Unwanted ventilation (draughty) - Shading - Wind U-Value - Answer-Measurement of heat loss through a given thickness of a speciic material. U-values depend upon thermal conductivity and the thickness of the material - the lower the U-value the lower the rate of heat loss. Stretcher bond - Answer-Cavity wall, gaps at the bottom of the wall are known as 'weep holes' which allow air into the cavity and any moisture out flemish bond - Answer-Solid wall construction. Made up of alternating headers and stretchers. cavity wall with 'snapped headers' - Answer-Snapped headers are bricks cut in half to create a cavity rather than have a fullbrick making a solid wall Heat lost from high rise flats - Answer-- Single glazed windows and uninsulated walls - Good example of cold bridging as floor extends to the balcony - Upper storeys due to exposure - Concrete walls and a flat roof Low rise flats heat loss - Answer-- Concrete panel walls - in particular end wall - Flat roof - Single glazed windows - Exposed internal walls which act as cold bridges Bungalow heat loss - Answer-- Pitched rood - large surface area - Cavity walls - three exposed walls - Floor area Town Flats heat loss - Answer-- Single glazed windows - Tiled bays underneath the windows - timber construction - Solid walls Victorian house heat loss - Answer-- Solid stone walls - Single glazed windows - Tunnel with exposed wall and floor above - Dormer windows in the roof End terrace house heat loss - Answer-- Solid brick walls - in particular the gable end and the shaded sections of the walls - Single glazed windows - Large pitched roof Terrace house heat loss - Answer-- Single glazed windows - in particular large bay window - Large pitched roof - Solid brick walls How water cylinder jacket - Answer-Jackets should have British Safety Kite Mark and thermostat must not be covered by insulation. Draughtproofing - Answer-Materials include compression seals, door brushes, wiper seals and gun applies sealants Cavity wall insulation - Answer-- Reduces heat loss through walls by up to 60% and installation takes less than half a day to complete - Most common material used is mineral wool fibre which is blown into the cavity using compressed air - Polystyrene beads or granules also used to fill cavities. Method is rarely used now as beads can escape if cavity is not sealed correctly - Polyurethane foam also used, more expensive but slightly better performance Suspended Timer Floor insulation - Answer-If you have entry to a cellar, fixing rigid insulation boards underneath the floor is an easier option than lifting floor boards. Insulation boards are installed Floating floor insulation - Answer-Where dwelling has a solid floor it can be insulated by lying rigid insulation board on the top of the floor followed by a vapour barrier and the final floor covering. This type of insulation will result in a higher surface meaning doors need to be shortened and adjusting skirting boards Pitched roof insulation - Answer-- loft insulation at a depth of at least 11"/270mm - Insulation laid between and over ceiling joints and in loft space - Mineral fibre wool will have to meet british Standards - Granules can also be used however they may shift and become uneven - Once installed loft temp is colder so tanks and pipes need lagging - Loft hatch should be insulated with rigid insulation board and draght strips fitted around the edge