EGEE 102 Quiz 8
The compressor of a heat pump system ___________ the pressure of the refrigerant, ________ its
Answer: increases, raising
Flat plate collectors are usually placed on the roof or ground in the sunlight. They are classified as a(an)
Answer: Active system
What is the most commonly used fuel for residential heating?
Using kitchen and bath exhaust fans may adversely affect the heating and cooling requirements.
Where there is limited space, a hydronic heating system can be installed vertically.
Answer: False. A GHP can be installed vertically if there is limited space. A hydronic heating system
must be installed horizontally underneath the floor to be effective.
There is no reason to ventilate the attic in the summer if it is well insulated.
Answer: False. Ventilating the attic in the summer lets the hot air to escape.
What is the typical range for the COP for heat pumps?
Answer: 1.5 – 3.5
When a heat pump is used to heat a house in winter, how is the Coefficient of Performance affected as the
outside temperature drops?
Radiant floor systems heat _____.
Answer: the entire floor
A house that effectively uses passive solar heating and cooling will_____.
Answer: Face south and have deciduous trees growing on the south side to block heat in the summer and
allow sunlight in the winter.
Bleeding air from the pipes of a hydronic radiant baseboard heating system will _____.
Answer: Increase efficiency
Which one of the following devices may heat as well as cool a house?
Answer: a heat pump
An active system emits more SO2 directly into the environment than a passive system.
Answer: False. Both the active and passive systems use solar energy, which do not directly emit SO2
energy into the environment.
A heat pump (heating) with a COP of 2.8 maintains an indoor temperature of 67 degrees F. What is the
outside temperature (in oF)?
Answer: 67 oF = (67 - 32) 5 / 9 oC = 19.44oC = 19.44 + 273 K= 292.44 K
' 2.8 = 292.44 / (292.44 - tcold)
tcold = 292.44 - 292.44 / 2.8 = 187.99 K = 187.99 - 273 oC = -85.01 oC = (-85.01 x 9 / 5) + 32 oF =
Horizontal loop Geothermal heat pumps are used when there is less space available
Answer: False. Vertical loop Geothermal heat pumps are used when there is less space available
Using kitchen and bath exhaust fans may adversely affect the heating and cooling requirements
Which of the following items is used in a passive solar heating system?
Answer: Flat plate collectors
AFUE stands for _____.
Answer: Annual Fuel Utilization Efficiency
Which of the following is not true about a geothermal heat pump?
Answer: Its cost is a hindrance for their development
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