BOMI ENERGY MANAGEMENT AND CONTROLS MASTER
SET EXAM SOLVED #9
Define Thermal Energy - correct answer Energy associated with the movement of
molecules and measured as heat
Define Electrical Energy - correct answer Energy associated with the flow of negatively
charged electrons through a conductive medium.
Define Mechanical Energy - correct answer The sum of kinetic and potential energy.
Kinetic being the energy of motion, potential being stored energy.
Define BTU - correct answer Quantity of heat possessed by an object is measured in
BTU. It is the amount of heat required to raise temp of one pound of pure water one
degree F at sea level.
What is the fundamental law of heat transfer? - correct answer heat always flows from
an object that is warmer to an object that is cooler.
What are the three factors affecting amount and rate of heat flow through a building
envelope? - correct answer 1. Total surface area
2. Temperature differences
3. Material properties.
What are the four factors uses to evaluate the materials that form a building enevlope? -
correct answer 1. Thermal Conductivity
2. Thermal Conductance
3. Thermal Resistance
4. Overall Coefficient of heat transfer
What is thermal conductivity? - correct answer The measurement of a materials ability
to conduct heat.
What is thermal conductance? - correct answer A measure of the rate of heat flow
through a material or air space.
What is thermal resistance? - correct answer A materials ability to retard heat flow.
What is the overall coefficient of heat transfer? - correct answer Resistance value of all
building materials, air spaces, including walls, ceilings and surface air films.
What happens when heat is added to a substance? - correct answer It's molecular
motion increases.
,What is temperature? - correct answer The measurement of the intensity of heat.
What does a BTU measure? - correct answer The quantity of heat.
What is sensible heat? - correct answer heat that when added to or removed from a
substance it changes the temperature of the substance
What is specific heat? - correct answer The ratio of the temperature it takes to raise the
temperature of a substance 1 degree to the amount of heat it takes to raise a pound of
pure water 1 degree.
What is the formula for determining the amount of heat required to change the
temperature of a substance without changing the substances state? - correct answer
Heat required in BTU - weight in LB X specific heat X temp change in degrees F.
What is latent heat? - correct answer Heat that when added or removed from a
substance changes that substances state, but not its temperature.
What are the standard terms used to describe the change of a substance from one state
to another through the absorption or release of latent heat? - correct answer solid to
liquid: melting
Liquid to solid: fusion
Liquid to gas: vaporization
Gas to liquid: condensation
What are the three basic processes of heat transfer? - correct answer Conduction,
Convection, Radiation
What is conduction? - correct answer Heat transfer through matter, molecule to
molecule, due to temp difference
What is convection? - correct answer Heat transfer through fluid, typically air or water
What is radiation? - correct answer Heat transfer through electromagnetic waves
What is scale formation? - correct answer mineral deposits on a metal surface that have
precipitated out of a solution
What happens to a boiler with excessive scaling? - correct answer Reduced steam
output, excessive fuel use, increase in stack temp.
What should be done to the feedwater treatment if scale is present? - correct answer
modify schedule and/or add chemicals.
What else can be done to reduce scale? - correct answer Use blowdown controls.
, What aspects of building design to climate conditions influence? - correct answer
Orientation, configuration, envelope, energy requirements, illumination, heating, HVAC
requirements.
What climatic conditions affect buildings energy use? - correct answer Temperature
variation, quality of sunlight, wind velocity and direction, and snowfall
What are some solar controls that are used to reduce heat losses and gains caused by
windows? - correct answer Curtains, awnings, tinted glass, reflective films.
What does heat absorbing glass do? - correct answer reduces solar radiation,
transmission without substantially reducing visibility
What type of glass should be used in buildings with long cooling seasons? - correct
answer reflective glass
What do anti reflective coatings do? - correct answer increase both day and night solar
heat gains in a space by reducing solar heat relfected
What do low-E coatings do? - correct answer Pass long wave radiation into a building
for winter heating and reflect solar radiation from outside surfaces back for summer
cooling
What causes stack effect? - correct answer Air infiltration patter where air enters lower
floors rises within the building and exits the upper floors due to the natural rising warmer
air.
What will you need to do to assess the financial value of an energy management
system? - correct answer Assess energy performance, set financial goals
Communicate goals
Track energy performance and financial outcomes
Review and improve action plan
Communicate results
Why is it important to establish a baseline of a buildings current energy use? - correct
answer so you can compare once the improvements are made.
What is the next step after establishing a buildings energy performance baseline? -
correct answer set energy performance goal
What does EPA's FVC do? - correct answer Financial value calculator. Measures
energy performance to determine feasibility of energy instruments. Illustrates increase
in capitalized complete corporate value. Track energy performance improvements
SET EXAM SOLVED #9
Define Thermal Energy - correct answer Energy associated with the movement of
molecules and measured as heat
Define Electrical Energy - correct answer Energy associated with the flow of negatively
charged electrons through a conductive medium.
Define Mechanical Energy - correct answer The sum of kinetic and potential energy.
Kinetic being the energy of motion, potential being stored energy.
Define BTU - correct answer Quantity of heat possessed by an object is measured in
BTU. It is the amount of heat required to raise temp of one pound of pure water one
degree F at sea level.
What is the fundamental law of heat transfer? - correct answer heat always flows from
an object that is warmer to an object that is cooler.
What are the three factors affecting amount and rate of heat flow through a building
envelope? - correct answer 1. Total surface area
2. Temperature differences
3. Material properties.
What are the four factors uses to evaluate the materials that form a building enevlope? -
correct answer 1. Thermal Conductivity
2. Thermal Conductance
3. Thermal Resistance
4. Overall Coefficient of heat transfer
What is thermal conductivity? - correct answer The measurement of a materials ability
to conduct heat.
What is thermal conductance? - correct answer A measure of the rate of heat flow
through a material or air space.
What is thermal resistance? - correct answer A materials ability to retard heat flow.
What is the overall coefficient of heat transfer? - correct answer Resistance value of all
building materials, air spaces, including walls, ceilings and surface air films.
What happens when heat is added to a substance? - correct answer It's molecular
motion increases.
,What is temperature? - correct answer The measurement of the intensity of heat.
What does a BTU measure? - correct answer The quantity of heat.
What is sensible heat? - correct answer heat that when added to or removed from a
substance it changes the temperature of the substance
What is specific heat? - correct answer The ratio of the temperature it takes to raise the
temperature of a substance 1 degree to the amount of heat it takes to raise a pound of
pure water 1 degree.
What is the formula for determining the amount of heat required to change the
temperature of a substance without changing the substances state? - correct answer
Heat required in BTU - weight in LB X specific heat X temp change in degrees F.
What is latent heat? - correct answer Heat that when added or removed from a
substance changes that substances state, but not its temperature.
What are the standard terms used to describe the change of a substance from one state
to another through the absorption or release of latent heat? - correct answer solid to
liquid: melting
Liquid to solid: fusion
Liquid to gas: vaporization
Gas to liquid: condensation
What are the three basic processes of heat transfer? - correct answer Conduction,
Convection, Radiation
What is conduction? - correct answer Heat transfer through matter, molecule to
molecule, due to temp difference
What is convection? - correct answer Heat transfer through fluid, typically air or water
What is radiation? - correct answer Heat transfer through electromagnetic waves
What is scale formation? - correct answer mineral deposits on a metal surface that have
precipitated out of a solution
What happens to a boiler with excessive scaling? - correct answer Reduced steam
output, excessive fuel use, increase in stack temp.
What should be done to the feedwater treatment if scale is present? - correct answer
modify schedule and/or add chemicals.
What else can be done to reduce scale? - correct answer Use blowdown controls.
, What aspects of building design to climate conditions influence? - correct answer
Orientation, configuration, envelope, energy requirements, illumination, heating, HVAC
requirements.
What climatic conditions affect buildings energy use? - correct answer Temperature
variation, quality of sunlight, wind velocity and direction, and snowfall
What are some solar controls that are used to reduce heat losses and gains caused by
windows? - correct answer Curtains, awnings, tinted glass, reflective films.
What does heat absorbing glass do? - correct answer reduces solar radiation,
transmission without substantially reducing visibility
What type of glass should be used in buildings with long cooling seasons? - correct
answer reflective glass
What do anti reflective coatings do? - correct answer increase both day and night solar
heat gains in a space by reducing solar heat relfected
What do low-E coatings do? - correct answer Pass long wave radiation into a building
for winter heating and reflect solar radiation from outside surfaces back for summer
cooling
What causes stack effect? - correct answer Air infiltration patter where air enters lower
floors rises within the building and exits the upper floors due to the natural rising warmer
air.
What will you need to do to assess the financial value of an energy management
system? - correct answer Assess energy performance, set financial goals
Communicate goals
Track energy performance and financial outcomes
Review and improve action plan
Communicate results
Why is it important to establish a baseline of a buildings current energy use? - correct
answer so you can compare once the improvements are made.
What is the next step after establishing a buildings energy performance baseline? -
correct answer set energy performance goal
What does EPA's FVC do? - correct answer Financial value calculator. Measures
energy performance to determine feasibility of energy instruments. Illustrates increase
in capitalized complete corporate value. Track energy performance improvements
