MEP Test 1 QUESTIONS AND ANSWERS 100%ACCURATE.
Air Conditioning - ✅✅Controlling air temperature, humidity and quality
Air-cooled condenser - ✅✅A heat exchanger that transfers building heat to outdoor air
BTU (British Thermal Unit) - ✅✅Quantity of heat, one ___ will increase the temp of 1 pound
of water 1 degree Fahrenheit
1 Calorie = - ✅✅4 BTU
BTUH or BTU/H - ✅✅Rate of heat flow per hour
CFM (Cubic Ft. per min) - ✅✅Quantity of air
Chiller - ✅✅A heat exchanger where an evaporating refrigerant chills water
Chill water - ✅✅Water about 45 degrees used in a heat exchanger to cool and dehumidify an
air stream
Condensation - ✅✅Change of state from vapor to liquid; heat is released
Constant Volume of Air (CV) - ✅✅HVAC equipment that controls room temperature by
supplying a constant quantity of conditioned air
Cooling Tower - ✅✅A heat exchanger that transfers building heat to outdoor air by
evaporating water, which can cool water to 10 to 15 degrees below ambient air temperature
COP (Coefficient of performance) - ✅✅An efficiency rating for heating/cooling equipment.
BTU delivered/removed divided by input BTU.
Dehumidify - ✅✅Remove moisture from the air
Dry-bulb Temperature - ✅✅Temperature indicated by a standard thermometer (temperature
we always see)
DX (Direct Expansion) - ✅✅Window mounted air conditioner unit, which refers to expanding
of a refrigerant as a means of cooling indoor air
Economizer - ✅✅Describes air intakes and dampers that use outdoor air instead of
refrigeration for building cooling when outdoor temperature conditions are right
,Emissivity - ✅✅Tendency of a surface to radiate heat
Enthalpy - ✅✅Total heat in an air/water vapor mixture (BTU per pound of dry air)
Evaporator - ✅✅A heat exchanger where evaporating refrigerant cools and air stream
GPM (Gallons per minute) - ✅✅Quantity of fluid flow
Grain - ✅✅1/7000 of a pound
How should a building transfer heat? - ✅✅Between exhaust air and incoming outdoor air,
which permits building operators to use outdoor air for odor control
HSPF (Heating Seasonal Performance Factor) - ✅✅Number of BTUs per watt delivered by a
heat pump, which is an index of heating efficiency of a residential heat pump
Humidify - ✅✅Add moisture to the air
Infiltration - ✅✅Air that leaks into a building, by reducing the fresh air supply will save
heating and cooling dollars, meausre in CFM and can be quantified using ACH (air change per
hour) times volume/ 60
k - ✅✅Tendency to conduct heat for a 1-inch thickness material
kW (kilowatt) - ✅✅1,000 Watts of energy
Latent Heat - ✅✅Hidden Heat, absorbed or released when water changes state, which exists
when water vapor is carried by the air
Psychometrics - ✅✅properties of air/water vapor mixtures, known as the study of atmospheric
conditions and describes interactions with air, water, and moisture
Resistance (R) - ✅✅Tendency to resist heat flow 1/k or 1/C
Refrigeration - ✅✅Moving heat from a cool location to a warm location
SEER (Seasonal Energy Efficiency Ratio) - ✅✅Cooling efficency rating for air conditioners
and heat pumps. Done by knowing the number of BTU removed by each watt of energy input
Sensible Heat - ✅✅Dry heat, as measure by the dry-bulb thermometer
Specific Heat - ✅✅Number of BTU that will increase the temp of 1 pound of substance 1
degree Fahrenheit
, Strip Heat - ✅✅Electric resistance heating, used for air not water
Throw - ✅✅Horizontal distance an air stream travels, from a register before it slows down to
a velocity which is comfortable to people (50-100)
Ton - ✅✅12,000 BTUH cooling effect
U (Conductance) - ✅✅Tendency of a construction to produce heat, Opposite of resistance,
which is the reciprocal of R
Variable Air Volume for air supply (VAV) - ✅✅HVAC equipment that controls room
temperature by controlling the quantity of conditioned air, in response to changing
heating/cooling loads
Ventilation - ✅✅Outside air brought into the building, used for commercial to ensure healthy
and odor-free environment, measured in CFM
Watt - ✅✅A quantity of electrical energy, about 10 BTU are required to produce a ___ at
power plants
Wet Bulb Temperature - ✅✅Temperature indicated by a thermometer when water is
evaporating from a wet sleeve attached to the thermometer bulb. An indicator of the total heat in
a air/water vapor mixture (finding enthalpy)
Sedoc - ✅✅Known as criteria for buildings dealing with an imaginary lightly clothed
sedentary occupant (sitting)
Most people prefer ___ in summer for dry bulb and _____ in the winter - ✅✅75 degrees, 70
degrees
Convection - ✅✅Circular flow of air or liquid heat transfer, by hot and cold circulation, needs
a medium
Radiation - ✅✅If two bodies are in line of sight of each other, comes directly from other body
instantly (no medium), travels in form of electromagnetic waves
Evaporation - ✅✅A one way process, cooling only in use of some liquid (sweat), Change of
state from liquid to vapor
Conduction - ✅✅Heat transfer by direct touch (if object is cold, there is a heat transfer from
the higher temperature until both are same)
Air Conditioning - ✅✅Controlling air temperature, humidity and quality
Air-cooled condenser - ✅✅A heat exchanger that transfers building heat to outdoor air
BTU (British Thermal Unit) - ✅✅Quantity of heat, one ___ will increase the temp of 1 pound
of water 1 degree Fahrenheit
1 Calorie = - ✅✅4 BTU
BTUH or BTU/H - ✅✅Rate of heat flow per hour
CFM (Cubic Ft. per min) - ✅✅Quantity of air
Chiller - ✅✅A heat exchanger where an evaporating refrigerant chills water
Chill water - ✅✅Water about 45 degrees used in a heat exchanger to cool and dehumidify an
air stream
Condensation - ✅✅Change of state from vapor to liquid; heat is released
Constant Volume of Air (CV) - ✅✅HVAC equipment that controls room temperature by
supplying a constant quantity of conditioned air
Cooling Tower - ✅✅A heat exchanger that transfers building heat to outdoor air by
evaporating water, which can cool water to 10 to 15 degrees below ambient air temperature
COP (Coefficient of performance) - ✅✅An efficiency rating for heating/cooling equipment.
BTU delivered/removed divided by input BTU.
Dehumidify - ✅✅Remove moisture from the air
Dry-bulb Temperature - ✅✅Temperature indicated by a standard thermometer (temperature
we always see)
DX (Direct Expansion) - ✅✅Window mounted air conditioner unit, which refers to expanding
of a refrigerant as a means of cooling indoor air
Economizer - ✅✅Describes air intakes and dampers that use outdoor air instead of
refrigeration for building cooling when outdoor temperature conditions are right
,Emissivity - ✅✅Tendency of a surface to radiate heat
Enthalpy - ✅✅Total heat in an air/water vapor mixture (BTU per pound of dry air)
Evaporator - ✅✅A heat exchanger where evaporating refrigerant cools and air stream
GPM (Gallons per minute) - ✅✅Quantity of fluid flow
Grain - ✅✅1/7000 of a pound
How should a building transfer heat? - ✅✅Between exhaust air and incoming outdoor air,
which permits building operators to use outdoor air for odor control
HSPF (Heating Seasonal Performance Factor) - ✅✅Number of BTUs per watt delivered by a
heat pump, which is an index of heating efficiency of a residential heat pump
Humidify - ✅✅Add moisture to the air
Infiltration - ✅✅Air that leaks into a building, by reducing the fresh air supply will save
heating and cooling dollars, meausre in CFM and can be quantified using ACH (air change per
hour) times volume/ 60
k - ✅✅Tendency to conduct heat for a 1-inch thickness material
kW (kilowatt) - ✅✅1,000 Watts of energy
Latent Heat - ✅✅Hidden Heat, absorbed or released when water changes state, which exists
when water vapor is carried by the air
Psychometrics - ✅✅properties of air/water vapor mixtures, known as the study of atmospheric
conditions and describes interactions with air, water, and moisture
Resistance (R) - ✅✅Tendency to resist heat flow 1/k or 1/C
Refrigeration - ✅✅Moving heat from a cool location to a warm location
SEER (Seasonal Energy Efficiency Ratio) - ✅✅Cooling efficency rating for air conditioners
and heat pumps. Done by knowing the number of BTU removed by each watt of energy input
Sensible Heat - ✅✅Dry heat, as measure by the dry-bulb thermometer
Specific Heat - ✅✅Number of BTU that will increase the temp of 1 pound of substance 1
degree Fahrenheit
, Strip Heat - ✅✅Electric resistance heating, used for air not water
Throw - ✅✅Horizontal distance an air stream travels, from a register before it slows down to
a velocity which is comfortable to people (50-100)
Ton - ✅✅12,000 BTUH cooling effect
U (Conductance) - ✅✅Tendency of a construction to produce heat, Opposite of resistance,
which is the reciprocal of R
Variable Air Volume for air supply (VAV) - ✅✅HVAC equipment that controls room
temperature by controlling the quantity of conditioned air, in response to changing
heating/cooling loads
Ventilation - ✅✅Outside air brought into the building, used for commercial to ensure healthy
and odor-free environment, measured in CFM
Watt - ✅✅A quantity of electrical energy, about 10 BTU are required to produce a ___ at
power plants
Wet Bulb Temperature - ✅✅Temperature indicated by a thermometer when water is
evaporating from a wet sleeve attached to the thermometer bulb. An indicator of the total heat in
a air/water vapor mixture (finding enthalpy)
Sedoc - ✅✅Known as criteria for buildings dealing with an imaginary lightly clothed
sedentary occupant (sitting)
Most people prefer ___ in summer for dry bulb and _____ in the winter - ✅✅75 degrees, 70
degrees
Convection - ✅✅Circular flow of air or liquid heat transfer, by hot and cold circulation, needs
a medium
Radiation - ✅✅If two bodies are in line of sight of each other, comes directly from other body
instantly (no medium), travels in form of electromagnetic waves
Evaporation - ✅✅A one way process, cooling only in use of some liquid (sweat), Change of
state from liquid to vapor
Conduction - ✅✅Heat transfer by direct touch (if object is cold, there is a heat transfer from
the higher temperature until both are same)
