Humber Real Estate - Course 2, Module 7, Understanding Residential Construction - Mechanical Systems Questions and Answers 2024 Complete;100% verified

How does electrical service enter a building? - Answer-From the street via the electrical service entrance cable into the electrical main disconnect, where it can be shut off. From there it goes to the Distribution panel and gets sent through circuits to various outlets, where appliances can be plugged in. The electrical main disconnect is often incorporated into the distribution panel. When an electrical system has fuses in the distribution panel, each of these fuses must have the same _________ as the wire it is protecting. - Answer-Rating What are the 3 types of wiring? - Answer-- Copper (most modern & desirable) - Aluminum (older, prone to oxidization, softer and more brittle than copper, can pose fire risk) - Knob-and-tube (Used prior to the 1930s, not grounded, can be dangerous) What type of outlet should be used in a bathroom? - Answer-One with a ground fault circuit interrupter (to help avoid electrocution risk in locations near water). What are some warning signs you should look for that may indicate problems with an electrical system? - Answer-- Frequent blown fuses or tripped circuit breakers - Hot or charred outlets - Burning smells - Flickering or dimming lights - Electric shocks - Light bulbs burning out too quicklyWhat are the benefits and financial incentives or using solar panels? - Answer-- Can be installed in homes with enough roof space and access to sunshine - With a net metering system, more electricity can be created during the summer months, creating a surplus in the form of credit, which can be used to offset the cost of electricity bills for days with decreased availability of sunlight (can also be sold to the electric company for credits) What is the ideal direction a house's exposure for solar panels to work effectively? - Answer-South / South-West What are the primary requirements of any heating system? - Answer-- Size (large enough to provide adequate heat on the coldest day) - Reliability (reliable and safe) - Cost (Economical to install and operate) - Equal heating distribution (Capable of heating all parts of the home equally) Heating systems are rated for capacity and efficiency. Capacity tells homeowners what? - Answer-How much heat a heating system can generate. What are the 2 types of capacity in reference to heating systems? - Answer-- Input capacity (How much fuel is consumed for every hour of operation in British Thermal Units [BTU] per hour) - Output capacity (How much usable heating or cooling the unit provides to a home) A heating system's input capacity + Output capacity = ? - Answer-Efficiency rating, expressed as a percentage. What are heating system efficiency ratings based on? - Answer-The Annual Fuel Utilization Rating (AFUE), which measures how much fuel is converted to heat in a heating system. Example: If a heating system has an AFUE rating of 60%, then 40 cents of every dollar spent on heating are being wasted.Canada's Energy Efficiency Regulations mandate that gas furnaces manufactured after December 31, 1999 must have a minimum efficiency rating of ____% - Answer-90 What types of heating systems are there? - Answer-- Forced air - Steam (radiators, good for allergies) - Hot water (radiators, good for allergies) - Electric (good for allergies) - Radiant (good for allergies) - Ground source heat pumps - Air source heat pumps