MEP study guide 1

Used in calculating the amount of outdoor air volume. winter rates are typically 50% larger than Summer rates

Air Changes

HVAC Equipment that can change air temperature, Humidity, Quality and Quantity using fans, Coils Mixing Boxes, & filters

Air Handlers

Heating Equipment that heats water

Boiler

Horizontal Portion of a flue

Breeching

The air temperature at which condensation occurs

Dew Point

The total heat contained in an air/water vapor mixture

Enthalpy

Lighting loads add heat to the building at 1.1 BTUH for each watt of light in operation

False

Sensible heat is measured using a thermometer with a wet sock attached to the bulb

False

The equal friction method of duct sizing is involves more calculations but is more accurate in balancing an HVAC System than the static regain method

False

A BTU Quantity of heat required to change the temperature of one Sq ft of water 1 degree F

False it is 1 lbs of water

Heating equipment that uses air directly with out the use of another medium

Furnace

System that can provide heating or cooling by a 4way reversing value

Heat Pump

The moisture heat contained in an air/water mixture

Latent Heat

Used in the absorption of a refrigeration cycle

Lithium Bromide

which of the following items produces only sensible loads during the summer cooling season

Motors

U=(1/Rt)

Reciprocal of thermal Reistance

The number of BTU removed by each watt of energy input

SEER

Occurs when an HVAC System has been oversized for the loads facilitated in a building

Short Cycle

TETD Varies due to sun orientation, time of day, absorption Properties of the exterior surface and the total Thermal mass of the building

TRUE

A BTU Quantity of heat required to change the temperature of one LBS of water 1 degree F

True

A two- Pipe System includes a Supply Branch for balance allowing each unit in the system to be individually controlled

True

Steam generating Heating systems typically cost more for installation and could require more maintenance when compared to hot water generating heating systems

True

Refers to air brought into a building by fans to improver air quality and air flow

Ventilation

What method of heat transfer moves heat energy with the flow of fluid

convection

Uses both a grille and damper to control air flow

register

A heat pump loop can provide cooling by using a reversing value to convert the indoor coil to an evaporator and the outdoor coil to a condensor

true