Heat Gains And Losses Flashcards
External heat gains include those by: infiltration
Ventilation
Solar radiation
All of the above
All of the above
The wind velocity of \_\_\_\_\_\_is used to calculate the winter infiltration heat losses: 24km/h 15km/h 30km/h 36km/h
24km/h
The heat given off by light fixtures is not greatly affected by the: Current flow Room temperature Wind speed Ambient temperature
Room temperature
The amount of heat lost by conduction, convection, radiation’s, infiltration is greatly affected by: Room temperature Room size Ambient temperature Wind velocity
Wind velocity
External heat gains in a building are caused by:
Infiltration, conduction, ventilation or solar radian
Infiltration and heat gain
Motors boiler and mechanical equipment
Hot water tanks
Infiltration, conduction, ventilation and solar radiation
Which of the following methods can be used to estimate the ventilation load on a building? The u method Ventilation method Crack method Conversion method Conduction method
Crack method
Thermal conductance C may be defined as the:
Quantity of heat flow in unit time Q or W
Reciprocal of thermal conductance MK/W
Thermal transmission through a unit of a particular body
Thermal heat flow though a unit of a non uniform composite material
Thermal heat flow through a unit of a non uniform composite material
Heat load from the people in a room is mostly affected by: The size of the people The number of people None of the above The activity of the people Smoking
The activity of the people
One of the factors used to determine the ventilation rate in a building is the:
Solar load on the building
Activity in the building
Type of electrical equipment used
Type of insulation used
Cubic metre per hour CFM requirements per person
Cubic metre per hour CFM requirements person
The resistance to heat flow through walls floors and window is known as: Infiltration Total thermal resistance Reduced solar load U factor Ventilation
U- factor
Electric motor give off\_\_\_\_\_\_while running: No heat to the atmosphere Solar heat Latent heat Latent and sensible heat Sensible heat
Sensible heat
Heat loss from a building is: not affected by the density of the air
Affected by wind velocity
Independent from the outside air temp
Is not affected by wind velocity
Dependent on the shape of the openings in a building
Affected by wind velocity
