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Energy Audit updated Exam
- answer ✅✅ % recycled content cellulose - answer ✅✅75% 1st Law of Thermodynamics - answer ✅✅energy moves and changes form but cannot be created or destroyed 2nd Law of Thermodynamics - answer ✅✅heat moves from high temperature regions to lower temperature regions advanced framing - answer ✅✅2x6 frame construction 24" on center advanced framing +optimum value engineering can reduce costs by what %? - answer ✅✅40% Advanced framing can save what percent of the wood required to frame a house? - answer ✅✅40%
Advantages of Direct Digital Control - answer ✅✅- Reduces overshoot anad offset errors, thereby saving energy -flexibility to easily and inexpensively accomplish changes of control strategies -Calibration is maintained more accurately, thereby saving energy and providing better performance ammeter - answer ✅✅used to find quantity of electric current ASHRAE - answer ✅✅American Society of Heating Refrigerating and Air-conditioning Engineers barometer - answer ✅✅measures RH benefit of wood siding - answer ✅✅durable best street orientation for heating, cooling and lighting - answer ✅✅east-west
Common Energy Conservation Opportunity categories - answer ✅✅-building operations -lighting -water heating
- HVAC common features in accessible design - answer ✅✅wide doorways extra floor space one-story living Common office space should have __ the luminescence of task areas. hallway lighting should be ___ task lighting - answer ✅✅1/3, 1/ components of air-source heat pump - answer ✅✅refridgerant, compressor, condenser, evaporator components passive solar design - answer ✅✅orientation location and shade of windows use of thermal mass to collect/distribute heat
conservation opportunites for boilers - answer ✅✅ensure proper air for combustion perform flue gas analysis clean fouled nozzles Cx---commissioning - answer ✅✅new facility that performs and meets defined objectives Data gathered in a building envelope audit - answer ✅✅-Building characteristics and construction -Window and door characteristics
- Insulation status decoupling membrane - answer ✅✅flexible plastic sheet that acts as a buffer for shock absorption between finished floors and underneath concrete devices that do not use resistance heating to convert electricty to heat - answer ✅✅heat from lighting heat pump
Energy audit - answer ✅✅process of determining and identifying the sites positives and negatives Energy mortgage - answer ✅✅Mortgage that credits a home's energy efficiency savigs with respect to the monthly savings. can lead to purchasing a higher quality home Essential Solar design strategies - answer ✅✅shading daylighting window size/oreintation evergreens on east and west deciduous on south side for shade in summer - answer ✅✅ example of non-distributed HVAC system - answer ✅✅forced air heating Facts about Batt insulation - answer ✅✅-must fit snugly without compression or gaps to be effective
-must be carefully cut and fitted around all obstructions, including wires and pipes, not stuffed around them -Gaps and compressions as little as 5% of the area can decrease its thermal performance by 50% Fenestration - answer ✅✅products that fill openings in buildings envelope (windows, doors, skylights) First step in accurate building simulation - answer ✅✅knowledge of the tool to be employed Flows that building science focuses on - answer ✅✅heat, air and moisture Four conditions of environment that affect comfort - answer ✅✅- temp -RH -air speed -MRT near air temp
Highest possible R-value a top-of-the-line window can provide - answer ✅✅ 7 How many gallons of fresh water can be saved annually using a whole-house gray water system? - answer ✅✅between 30,000 and 50, How much of the energy produced in the United States is consumed by residential buildings - answer ✅✅21% ideal load factor - answer ✅✅ 1 In the northern hemisphere, in which direction should most of the home's glazing face? - answer ✅✅South incandescent lamp focused 2 inches ahead of the lamp so very little light is trapped in the fixture - answer ✅✅ER lamp It is best to use what when assessing lighting - answer ✅✅point-by-point because it measures energy
requirements when the light is both used and unused It is cost-effective to reduce costs associated with - answer ✅✅base-load LED - answer ✅✅semiconductor that converts electricity into light lighting systems is affected the least by a 10 percent reduction in voltage? - answer ✅✅fluorescent Load factor - answer ✅✅Actual load HP * 100/ Nameplate HP low e coating - answer ✅✅reduce infrared light passing through glass most common issue with lighting - answer ✅✅overlighting of unimportant areas most cost-effective way to reduce solar gain through window - answer ✅✅install interior shutters
preheating ventilation - answer ✅✅Ventilation fans move cold outside air across metal cladding on the south wall before bringing it into the building Primary focus of lighting system audit - answer ✅✅Quantity of lighting primary heat transfer through window on a summer day - answer ✅✅radiation R= - answer ✅✅1/U Relevant concepts when considering lighting in building design - answer ✅✅Hawthorne effect, Destalt theory, Color constancy Residential building __% energy produced in US - answer ✅✅20% results in combustion=proper combustion - answer ✅✅High CO2, low O, no CO
Second largest consumer of energy in homes - answer ✅✅heating water siding that cannot be recycled - answer ✅✅vinyl simple payback - answer ✅✅cost of an upgrade divided by energy savings Solar Heat Gain Coefficient - answer ✅✅A measure of how well a product blocks heat from the sun Stack effect - answer ✅✅heat exhausted from top of building by stratification. shape of roof and wind velocity at diff elevations can cause standard # air changes per hour - answer ✅✅. structural steel minimal embodied energy - answer ✅✅ T/F buildings must be designed for heating and cooling loads, in most of the US, design should reflect the importance of each - answer ✅✅True
Three issues to be addressed when considering an energy retrofit - answer ✅✅- Technical feasibility
- Cost of installation -probable energy savings Three techniques to critique simulation program output - answer ✅✅-annual energy-use profile comparison -detailed output analysis -peak load comparison Three-tier approach to sustainability design of H,C and L - answer ✅✅Tier 1: Basic Building Desing Tier 2: Passive systems Tier 3: Mechanical equipment types of airflow - answer ✅✅laminar turbulent separated upgrade that makes the most sense for a lighting system with incandescent - answer ✅✅LED
Uses of humidification systems in home - answer ✅✅comfort and health of the occupants prevent wood cracking preserve materials Using a stick of length h, the height of a tree, H, can be measured using the formula - answer ✅✅H=S * (h/s) where S is the length of the tree shadow and s is the length of the sticks shadow ways moisture enters a build - answer ✅✅bulk moisture capillary action air leakge vapor diffusion What accounts for the highest energy use in office buildings? - answer ✅✅Space heating What floor finishing can be a thermal mass for passive solar - answer ✅✅stone
When performing an energy audit, the first step should be? - answer ✅✅collect energy bills from the last 2 years When shading a window on a building's west side while preserving views, what shading method should be used? - answer ✅✅horizontal overhangs Where should a thermal mass be located for passive solar heating benefits? - answer ✅✅The inside of the insulated walls Where should capillary break be installed? - answer ✅✅Between the top footing and foundation wall Which country is the largest contributor to Atmospheric CO2 content - answer ✅✅US Which of the following is NOT a common energy management system -duty cycling -demand limiting -time-of-day billing
-pneumatic controls - answer ✅✅pneumatic controls Which of the following is not a feature in ADA standards for accessible design? -One step shower entry -one story living -wide doorways -extra floor space - answer ✅✅one step shower entry Which of the following is not a principle of green building? -resource efficiency -reduced community impact -homeowner education and maitenance -targeted durability - answer ✅✅targeted durability Which of the following is NOT true of PVC siding -relatively durable -susceptible to damage in extreme cold/heat
