Deck 4: Energy Economics

Question 1

The required air leakage rate from a new building is in the range of?

A)Half to one air change per hour
B)1 to 10 m³/h m² at 50 Pa internal air pressure
C)0.25 air changes per hour
D)10 to 100 m³/h m² at 25 Pa internal air pressure
E)Must be zero

Answer 1

B

Question 2

Which of these is not a correct multiple?

A)MWh = 1000 W x 1 h
B)kJ = 10³ J
C)1 GJ = 10⁶ kJ
D)1 mm = 10^-3 m
E)1 GW = 1000 MW

Answer 2

A

Question 3

Which is not correct for CO₂ greenhouse gas?

A)Continuously converted back into O₂ by photosynthesis
B)Produced by ruminating animals
C)Easily reversed to solid carbon plus oxygen gas into the atmosphere
D)It is burnt carbon from fuel combined with atmospheric oxygen
E)Combusted hydrocarbons are not the sole source of greenhouse gases

Answer 3

C

Question 4

Which is Degree Day load factor not relevant to?

A)Ratio of degree days from meteorological data
B)Calculation of heating system kW load for design
C)Minimum outside air temperature for design
D)Seasonal weather variability
E)Maximum possible Degree Days for the locality

Question 5

Economic thickness of thermal insulation is which of these?

A)The optimum balance of capital cost of the insulation versus the value of energy transferred.
B)As much as the building owner can afford
C)No limit to the thickness for keeping warm in a cold climate
D)Impossible to evaluate
E)Anything that is allowed in the regulations governing building

Question 6

Which of these is included in the annual financial accounts for energy-saving projects?

A)Total cost of maintaining the building each year
B)Balance sheet for the building owners business
C)Balance sheet for the energy saving investment
D)Cash flow analysis for the duration of the energy-saving payback years
E)Total labour hours for all maintenance work in the building

Question 7

Which of these describes low energy buildings?

A)Always uncomfortable for occupants
B)Design predictions of energy use mean nothing to the user of the building
C)Must comply with an energy rating mandatory standard upon construction
D)Cannot maintain low energy use after three years of use
E)Cannot have large areas of glazing

Question 8

What does sustainability mean for low energy buildings?

A)All windows have low emissivity glass
B)Brick, steel and concrete walls save more energy consumption while in use than they cost to produce and construct
C)Aluminium window frames are not used in this building
D)Double glazed windows always used in cold climates
E)All thermal insulation, glass, aluminium, steel, timber and concrete in this building were harvested from renewable resources

Question 9

What is used in the USA to rate a building?

A)Leadership in Energy and Environmental Design
B)Low Energy Environmental Design
C)Low Electrical Energy Demand
D)Leading Electrical Energy Demonstration
E)Leader in Energy Environment and Design

Question 10

Which of these has the correct units?

A)1 MJ = 10³ kW/s
B)1 Joule = 1 Watt/s
C)10³ J = 1 kW/s
D)1 Watt = 10³ Joule/s
E)1 Joule = 1 Newton x 1 metre