ESET 444 EXAM 1 EXAM 2025
QUESTIONS AND ANSWERS
In addition to charging for peak demand, some utilities charge for kvars. What does the "R"
stand for in "kvar?" - ANS Reactive
An electric motor has input power rating of 250 kW. If the output power at fully rated load is
200 kW, what is the efficiency
of the motor? - ANS 80%
Why could the energy content of a fuel have a different value reported in the US compared to
Europe? - ANS The US typically uses higher heating value, which includes the energy
contained in water vapour. Europe typically uses
lower heating value, which does not include the heat associated with water changing state.
A factory uses 3000 therms / 8330 cubic metres of natural gas each month. The gas costs 72
cents per therm / 26 cents
per cubic metre. The energy value of the gas is 10.5 kWh per cubic metre. A kWh of electricity
costs 7c. Should the site
switch from natural gas to electricity, assuming that the efficiency remains the same? -
ANS No, the same energy value of electricity costs more
Which term describes a fuel that contains energy source that has not undergone any
conversion - ANS Primary
1 @COPYRIGHT THESTAR 2025/2026
,On a particular day the temperature monitoring system registered 7 cooling degree days. What
does this mean? - ANS The mean temperature was 7 degrees above the base temperature
In both the US customary and SI systems, electricity is expressed using which of the following
terms? - ANS Watts (kilowatts)
Which unit of measurement is generally used to measure energy content? - ANS British
Thermal Units (US) joules (SI)
A resistance of 500 ohms has a measured voltage drop of 120v. How much power is driving the
current? - ANS 28.8 watts
A resistance of 100 ohms has 4 amps flowing through it. What is the voltage drop across the
resistance? - ANS 400 volts
When making efficiency improvements, passive and active efficiency measures should always
be followed by which of the following in order to sustain savings? - ANS Monitoring
Installing occupancy and light-level sensors and implementing variable frequency drives in
motors are examples of which
type of efficiency measure? - ANS Active
Which of the following is the name for an analysis of a building's energy use where
opportunities for reducing energy consumption are identified and prioritized? - ANS Energy
audit
How much energy efficiency improvement can be achieved with current technologies? -
ANS Up to 30%
2 @COPYRIGHT THESTAR 2025/2026
, Replacing existing equipment with lower consumption devices, fixing leaks and adding
insulation are examples of which type of efficiency measure? - ANS Passive
Why is energy efficiency at the point of use the quickest, cleanest, most effective solution to
the energy dilemma? - ANS ( )Because due to transmission and generation losses, 300 units
of primary energy are required to provide 100 units of
end-user electricity. Hence saving energy at the point of use is more effective than building a
new power plant with double
the efficiency
( )Because the cleanest unit of energy is a unit of energy that wasn't produced and used
( )Because energy efficiency solutions are available now
( )Because energy projects are low risk and outperform many other investments
(x)All of the above ← Correct answer
Energy efficiency can be defined as: - ANS Reducing the amount of energy used while
maintaining outcomes: doing more with less
What is the energy dilemma? - ANS Energy demand is forecast to double, while emissions
have to be cut by half to avoid dramatic climate change
What percentage of energy consumption is used by industry, residences and tertiary buildings?
- ANS 72%
"You can't manage what you don't measure". Which of the following helps you overcome this
issue regarding energy? - ANS Energy management software
The purpose of a building control system is to measure environmental data (E.g. temperature,
humidity, pressure, or flow rate), compare that data against predetermined standards and
initiate a change in order to change or maintain current
environmental conditions. - ANS True
3 @COPYRIGHT THESTAR 2025/2026
QUESTIONS AND ANSWERS
In addition to charging for peak demand, some utilities charge for kvars. What does the "R"
stand for in "kvar?" - ANS Reactive
An electric motor has input power rating of 250 kW. If the output power at fully rated load is
200 kW, what is the efficiency
of the motor? - ANS 80%
Why could the energy content of a fuel have a different value reported in the US compared to
Europe? - ANS The US typically uses higher heating value, which includes the energy
contained in water vapour. Europe typically uses
lower heating value, which does not include the heat associated with water changing state.
A factory uses 3000 therms / 8330 cubic metres of natural gas each month. The gas costs 72
cents per therm / 26 cents
per cubic metre. The energy value of the gas is 10.5 kWh per cubic metre. A kWh of electricity
costs 7c. Should the site
switch from natural gas to electricity, assuming that the efficiency remains the same? -
ANS No, the same energy value of electricity costs more
Which term describes a fuel that contains energy source that has not undergone any
conversion - ANS Primary
1 @COPYRIGHT THESTAR 2025/2026
,On a particular day the temperature monitoring system registered 7 cooling degree days. What
does this mean? - ANS The mean temperature was 7 degrees above the base temperature
In both the US customary and SI systems, electricity is expressed using which of the following
terms? - ANS Watts (kilowatts)
Which unit of measurement is generally used to measure energy content? - ANS British
Thermal Units (US) joules (SI)
A resistance of 500 ohms has a measured voltage drop of 120v. How much power is driving the
current? - ANS 28.8 watts
A resistance of 100 ohms has 4 amps flowing through it. What is the voltage drop across the
resistance? - ANS 400 volts
When making efficiency improvements, passive and active efficiency measures should always
be followed by which of the following in order to sustain savings? - ANS Monitoring
Installing occupancy and light-level sensors and implementing variable frequency drives in
motors are examples of which
type of efficiency measure? - ANS Active
Which of the following is the name for an analysis of a building's energy use where
opportunities for reducing energy consumption are identified and prioritized? - ANS Energy
audit
How much energy efficiency improvement can be achieved with current technologies? -
ANS Up to 30%
2 @COPYRIGHT THESTAR 2025/2026
, Replacing existing equipment with lower consumption devices, fixing leaks and adding
insulation are examples of which type of efficiency measure? - ANS Passive
Why is energy efficiency at the point of use the quickest, cleanest, most effective solution to
the energy dilemma? - ANS ( )Because due to transmission and generation losses, 300 units
of primary energy are required to provide 100 units of
end-user electricity. Hence saving energy at the point of use is more effective than building a
new power plant with double
the efficiency
( )Because the cleanest unit of energy is a unit of energy that wasn't produced and used
( )Because energy efficiency solutions are available now
( )Because energy projects are low risk and outperform many other investments
(x)All of the above ← Correct answer
Energy efficiency can be defined as: - ANS Reducing the amount of energy used while
maintaining outcomes: doing more with less
What is the energy dilemma? - ANS Energy demand is forecast to double, while emissions
have to be cut by half to avoid dramatic climate change
What percentage of energy consumption is used by industry, residences and tertiary buildings?
- ANS 72%
"You can't manage what you don't measure". Which of the following helps you overcome this
issue regarding energy? - ANS Energy management software
The purpose of a building control system is to measure environmental data (E.g. temperature,
humidity, pressure, or flow rate), compare that data against predetermined standards and
initiate a change in order to change or maintain current
environmental conditions. - ANS True
3 @COPYRIGHT THESTAR 2025/2026
