EGEE Exam 3 UPDATED Exam Questions
and CORRECT Answers
we know that electrical resistance heating systems approach an efficiency of 97%. electrical
baseboard heating is more efficient than a heat pump. (t/f) - CORRECT ANSWER - true
due to convection, a house with an electric radiant system and floors with a high thermal mass
can reduce heating costs if the electric company offers "time of use" rates. (t/f) - CORRECT
ANSWER - false
which of the following energy sources is used in the most efficient heating system? - CORRECT
ANSWER - electricity
where there is limited space, a hydronic heating system can be installed vertically. (t/f) -
CORRECT ANSWER - false
A major portion of the energy consumption in households can be attributed to home heating and
cooling systems. (t/f) - CORRECT ANSWER - true
one of the heating systems we talked about in this course comprises of a system of ducts. What is
the process by which heat is transferred in this system? - CORRECT ANSWER - convection
after a house is built, the easiest way to insulate it is by insulating the ______. - CORRECT
ANSWER - attic
The time it takes to recover the additional cost through energy savings is called _______. -
CORRECT ANSWER - pay back period
What is the typical cost of natural gas per million BTUs? - CORRECT ANSWER - $4
, We are warmed by the sun. This is an example of heat transfer by _______. - CORRECT
ANSWER - radiation
The average cost of electricity in the US is _______ - CORRECT ANSWER - $80/MWh
The R-value of thermal insulation depends on _______. - CORRECT ANSWER - all of the
above (type of material, thickness, density)
A higher HDD indicates _______. - CORRECT ANSWER - all of the above (higher heat loss,
higher fuel requirements, higher temperature difference between inside and outside the house)
HDD is used to estimate the amount of energy required for residential space during heating
season. - CORRECT ANSWER - true
Home heating is the single highest energy expense for a household. (t/f) - CORRECT
ANSWER - true
A process by which energy is transferred as the vibrations of one molecule are passed on to the
next, but there is no movement of energetic atoms or molecules themselves is called ______. -
CORRECT ANSWER - conduction
Warm water rises in a lake and cold water descends. What is this due to? - CORRECT
ANSWER - convection
heat in a room from an air register moves from warmer areas to cooler areas in a room due to
______. - CORRECT ANSWER - convection
you feel the heat of a wood stove when you stand next to it. what is this due to? - CORRECT
ANSWER - radiation and convection
and CORRECT Answers
we know that electrical resistance heating systems approach an efficiency of 97%. electrical
baseboard heating is more efficient than a heat pump. (t/f) - CORRECT ANSWER - true
due to convection, a house with an electric radiant system and floors with a high thermal mass
can reduce heating costs if the electric company offers "time of use" rates. (t/f) - CORRECT
ANSWER - false
which of the following energy sources is used in the most efficient heating system? - CORRECT
ANSWER - electricity
where there is limited space, a hydronic heating system can be installed vertically. (t/f) -
CORRECT ANSWER - false
A major portion of the energy consumption in households can be attributed to home heating and
cooling systems. (t/f) - CORRECT ANSWER - true
one of the heating systems we talked about in this course comprises of a system of ducts. What is
the process by which heat is transferred in this system? - CORRECT ANSWER - convection
after a house is built, the easiest way to insulate it is by insulating the ______. - CORRECT
ANSWER - attic
The time it takes to recover the additional cost through energy savings is called _______. -
CORRECT ANSWER - pay back period
What is the typical cost of natural gas per million BTUs? - CORRECT ANSWER - $4
, We are warmed by the sun. This is an example of heat transfer by _______. - CORRECT
ANSWER - radiation
The average cost of electricity in the US is _______ - CORRECT ANSWER - $80/MWh
The R-value of thermal insulation depends on _______. - CORRECT ANSWER - all of the
above (type of material, thickness, density)
A higher HDD indicates _______. - CORRECT ANSWER - all of the above (higher heat loss,
higher fuel requirements, higher temperature difference between inside and outside the house)
HDD is used to estimate the amount of energy required for residential space during heating
season. - CORRECT ANSWER - true
Home heating is the single highest energy expense for a household. (t/f) - CORRECT
ANSWER - true
A process by which energy is transferred as the vibrations of one molecule are passed on to the
next, but there is no movement of energetic atoms or molecules themselves is called ______. -
CORRECT ANSWER - conduction
Warm water rises in a lake and cold water descends. What is this due to? - CORRECT
ANSWER - convection
heat in a room from an air register moves from warmer areas to cooler areas in a room due to
______. - CORRECT ANSWER - convection
you feel the heat of a wood stove when you stand next to it. what is this due to? - CORRECT
ANSWER - radiation and convection
