Deck 6: Heat Demand

Question 1

Areas of a building that do not respond to outdoor weather variations are which?

A)Store rooms
B)Areas more than 5.0 m from external walls
C)Most offices
D)Traditional stone churches
E)Zones that are air conditioned

Answer 1

B

Question 2

U value is the sum of all thermal resistivities in a structure

A)R value is the sum of all thermal resistances in a structure
B)U value is the sum of all thermal resistivities in a structure
C)R value is the sum of all thermal resistivities in a structure
D)value is the sum of all thermal resistivities in a structure
E)U value is the sum of all thermal resistances in a structure

Answer 2

A

Question 3

Which is the incorrect unit?

A)Thermal transmittance W/m² K
B)Thermal resistivity m K/W
C)Thermal resistance W/m² K
D)Thermal conductivity W/m K
E)Thermal resistance m² K/W

Answer 3

C

Question 4

Which does not apply to admittance values?

A)Expresses heat flow inwards to a heavy mass structural component
B)Y W/m² K
C)Used instead of thermal transmittance in certain circumstances
D)Reciprocal of U value
E)Used for highly intermittently heated buildings

Question 5

Which explanation of thermal conductivity is correct?

A)Units are W/m K
B)Ability of a material to resist the flow of heat
C)Property evaluating materials' ability to pass moisture
D)Equal to resistance multiplied by thickness
E)Units are W/m² K

Question 6

Which of these calculated values of thermal resistance is not correct?

A)A low energy building wall has 1.0 m thickness of phenolic foam having a thermal conductivity of 0.04 W/m K making a thermal resistance of 25.0 m² K/W
B)110 mm of brickwork is 0.13
C)150 mm of fibreglass roof insulation is 3.75
D)A metal window frame 20 mm thickness has a thermal conductivity of 50.0 W/m K and has a thermal resistance of virtually zero
E)100 mm concrete having a thermal conductivity of 2.0 W/m K is 0.05

Question 7

Which of these is correct?

A)Thermal resistance of a single glazed window in a wood frame is around 5.3 m² K/W
B)U value of a wooden framed single glazed window is around 5.3 W/m² K.
C)U value of a wooden framed single glazed window is around 5.3 m² K/W
D)Thermal transmittance of a single glazed window in a standard aluminium frame is around 59.6 W/m² K
E)A double glazed window has an overall U value of around two thirds that of an equivalent single glazed window

Question 8

What do sheltered, normal and severe apply?

A)Preferable location for the outside air intake louvers of an air conditioning system
B)Air conditioning zones
C)Thickness ratings for window glass
D)U values
E)Fire risk classifications for a building

Question 9

What does 0.33NV(t1-t2) mean?

A)Volumetric specific heat capacity of air, times number of air changes per hour, times room volume, times indoor-outdoor air temperature difference, calculates natural ventilation rate of heat loss for a heating system
B)One third of the volumetric air change rate multiplied by daily degree days above base temperature
C)33% of normal building volume per degree temperature difference to calculate energy usage cost
D)A design guide to the plant room floor area likely to be required for air handling units
E)A fraction of the nominal building volume multiplied by air temperature difference

Question 10

Which is correct about an existing structures' thermal transmittance?

A)Cannot be measured in-situ
B)Can only be calculated from design information
C)Measure structural temperatures to calculate U value
D)Measurement requires a thermal imaging camera
E)Thermocouple temperature sensors have to be buried into drilled holes through the structure