COSC 325 Houston Mechanical Latest Update

COSC 325 Houston (Mechanical) Latest Update

• 100 Questions and 100%

Verified Correct Answers Guaranteed A+ Approved by the Professor

5 requirements for comfort - CORRECT ANSWER: proper temperature, humidity,

circulation, filtration, ventilation

Actuator - CORRECT ANSWER: A device to produce physical movement based on

output from a computer system.

Air velocity - CORRECT ANSWER: the speed at which air moves from one point to

another

Are VAV systems DX (refrigerant) or Chilled water? - CORRECT ANSWER: Both.

ASHRAE - CORRECT ANSWER: American Society of Heating, Refrigerating and Air-

Conditioning Engineers

Auxiliary heat - CORRECT ANSWER: the extra heat provided by a conventional heating system for periods of cloudiness or intense cold when a solar heating system cannot provide enough

axial flow blower - CORRECT ANSWER: -Consists of a blower wheel that works like

turbine wheel -Used in medium to high pressure forced air heating systems

Blower - CORRECT ANSWER: pump-like mechanism which generates airflow

blowers used in forced-air systems - CORRECT ANSWER: propeller, centrifugal, axial 1 / 2

boiler - CORRECT ANSWER: central element of a steam or hydronic system. a

pressure vessel that safely and efficiently transfers heat to water

Building automation system - CORRECT ANSWER: control of the energy and resource

using devices in a building for optimization

centrifugal blower - CORRECT ANSWER: Consists of a scroll, blower wheel, shaft, and inlet vanes

Centrifugal pump - CORRECT ANSWER: Used mainly on hydronic systems. has a

rotating impeller inside a cast iron or steel housing.

Chiller - CORRECT ANSWER: A device that removes heat from a liquid, typically as part of a refrigeration system used to cool and dehumidify buildings. The system; it has the evaporator and condensor. Used in Hydronic

Commissioning - CORRECT ANSWER: the process of adjusting and verifying an HVAC

system to ensure it is operating as intended

Compressor - CORRECT ANSWER: mechanical device that compresses refrigerant or

other fluid

Control Point - CORRECT ANSWER: variable in a control sustem

Controller - CORRECT ANSWER: a device that makes decisions to change some

aspect of a system based on sensor information and internal programming

Cooling tower - CORRECT ANSWER: evaporative heat exchanger that removes heat

from water

Damper - CORRECT ANSWER: Controls flow

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