Cosc 325 exam 2 Houston STUDY SET WITH DETAILED QUESTIONS AND 100% VERIFIED ANSWERS.

BTU - CORRECT ANSWERS️️British Thermal Unit is the amount of heat required to raise 1 lb of water 1 degrees F. Ton - CORRECT ANSWERS️️amount of heat required to melt a ton of ice (2000 lb) over a 24-hour period. · 1 ton = 12,000 Btu/hr or 288,000 Btu per 24-hour period Humidity - CORRECT ANSWERS️️amount of moisture (water vapor) in the air · Comfortable relative humidity is about 50% Air Velocity - CORRECT ANSWERS️️speed at which air moves from one point to another · Measured in feet per minute (fpm) · 40 fpm is ideal Registers - CORRECT ANSWERS️️ Filtration - CORRECT ANSWERS️️process of removing particles and contaminants from air that circulated through an air distribution system · Located in air ductwork where air enters the heating and cooling equipment Ventilation - CORRECT ANSWERS️️process that occurs when outdoor air is brought into a building Exhaust & make up air - CORRECT ANSWERS️️Building with exhaust has no recirculation · Make up air: is air that is used to replace air that is lost to exhaust IAQ (Indoor air quality) - CORRECT ANSWERS️️is the quality of the air in the building space · CO2 levels: well ventilated - 600 to 1000 AVG. 800 ASHRAE (American Society of Heating, Refrigerating, and Air-conditioning Engineers, Inc.) - CORRECT ANSWERS️️· Recommends that ventilation be increased in all residential, commercial, and industrial buildings Dry bulb temperature - CORRECT ANSWERS️️measurement of a sensible heat Latent heat - CORRECT ANSWERS️️heat required to change liquid into a gas Relative Humidity - CORRECT ANSWERS️️is the amount of moisture in the air compared to the amount it would hold if the air were saturated Dew point - CORRECT ANSWERS️️The temperature below which moisture in the air begins to condense. Enthalpy: - CORRECT ANSWERS️️the total heat contained in a substance measure from a baseline of 32 degrees F and is the sum of sensible heat(dry bulb temperature) and latent heat Psychrometric Chart - CORRECT ANSWERS️️chart that defines the condition of the air for any given property Forced Air System - CORRECT ANSWERS️️forced air heating system is a heating system that uses air to carry heat. The air is heated and distributed through a building to control the temperature in the building space Furnace - CORRECT ANSWERS️️self-contained heating unit that includes a blower, burners, and heat exchanger or electric heating elements, and controls. Types of Blowers - CORRECT ANSWERS️️Blower fan, centrifugal blower, axial flow blower Propeller Fan - CORRECT ANSWERS️️mechanical device that consists of blades mounted on a central hub Centrifugal blower - CORRECT ANSWERS️️· consists of a scroll, blower wheel, shaft, and inlet vanes o Scroll is a sheet metal enclosure that surrounds the blower wheel o Blower wheel is a sheet metal cylinder with curved vanes along its perimeter Axial flow blower - CORRECT ANSWERS️️a blower that contains a blower wheel, which works like a turbine wheel