In regards to HVAC systems, what are some ways of improving indoor living comfort through the use of green technology?

An oversized air-conditioning system will A. cost more to install and operate. B. be more efficient than an undersized air-conditioning system. C. be better able to maintain the desired humidity in theconditioned space. D. require a smaller air distribution system than an undersized air-conditioning system.

Match each of the steady-flow engineering devices with its best description:   Question 1 options:   A device that increases the pressure of a fluid by slowing it down   A device where two fluids exchange heat without mixing   A device that increases the velocity of a fluid at the expense of pressure   Increases pressure of gasses and vapors   Increases pressure for liquids   Increases the pressure of a gas slightly and is mainly used to mobilize a gas   Produces shaft work   A device where two or more fluids are mixed   1. Turbine 2. Fan 3. Compressor 4. Pump 5. Heat exchanger 6. Mixing chamber 7. Nozzle 8. Diffuser

What is different in bitween Ozone and Smog.

ΙΟΝΑ: MECHANICAL (a) Explain four factors in determining the comfort level for an air conditioning room. Suggest the typical value for those factors.

Air-condition system being in every organization. How the Maintenance of Air Conditioning System take place. What are preventative measures required?

True or False: All heat pumps are practical anywhere in the United States. Explain your answer.

17) Consider a carwash application, where the electrical circuit includes several different types of circuit logic (e.g. could be AND, OR, NOT, NAND, NOR). The circuit logic can be developed by hard-wiring switches or by connecting the switches to digital logic gates that can be used to develop the circuit logic. PHOTOELECTRIC WET-DOWN MAIN CONTROL PANEL AREA- PHOTOELECTRIC S1- S2 WHEEL PULLER PB1 PB2- SOAP AREA PHOTOELECTRIC WASH AREA SOAP AREA EMERGENCY STOP $5 RINSE AREA -PHOTOELECTRIC S3 DRY AREA -WHEEL-PULLER MOTOR STARTER PHOTOELECTRIC S4 PHOTO SWITCH 5 DRYER OVERRIDE SWITCH -WASH AREA EMERGENCY STOP HEATING CONTACTOR M2 DRYER BLOWER MOTOR STARTER

The standard that a refrigerant must meet after it has been reclaimed and before it can be sold to another owner is A. ANSI 7000. B. ANSI 700. C. EPA 7000. D. AHRI 700.

1. (a) List out the classification of air-conditioning system. (b) With the aid of following sketch diagram(s) Fig.1, explain the working principle and details of the loops involved in the centralized HVAC building system. . Fresh Air Necessary considering IAQ Water 12°C 137°C Water Return Air 24°C Pump Air-handling Supply Unit Air Chiller Fan 7°C Cooling Tower 14°C Produce chilled water (7°C) 32°C Supply Air Pump Heat Gain or 24°C Return Air Heat Gain Room Chiller Fan Air cool chiller Heat rejected to the environment Fig.1 Systematic diagram of an air-conditioning system