EGEE 102 Exam 3 UPDATED Exam
Questions and CORRECT Answers
Which of the following indicates the heating requirement at a particular location? A) Higher
Heating Value B) Coefficient of Performance C) Heating Degree Days D) AFUE - CORRECT
ANSWER C
What is the average cost of electricity in the US? A) $8.0/kWh B) $0.06/MWh C) $80/MWh D)
$60/kWh - CORRECT ANSWER C
What is the most common fuel for home heating in the US? A) Coal B) Oil C) Natural Gas D)
Electricity - CORRECT ANSWER C
In State College PA the average outside temperature during the month of January was 39 degrees
F. Calculate the HDD for the month of January. A) 1209 degree days B) 26 degree days C) 780
degree days D) 806 degree days - CORRECT ANSWER D
A higher HDD indicates a _____. A) Higher heat loss B) Higher fuel requirements C) Higher
temperature difference between inside and outside D) All the above E) None of the above -
CORRECT ANSWER D Feedback: The higher HDD indicates a higher heat loss and
therefore, higher fuel requirements.
What is the process by which energy is transferred by the bulk motion of the fluids? A)
Conduction B) Convection C) Radiation - CORRECT ANSWER B
A thermos bottle has a shiny interior. What type of heat transfer does this prevent? A)
Conduction B) Convection C) Radiation - CORRECT ANSWER C Feedback: Radiation is
transfer of heat through electromagnetic radiation.
The R-value of a composite wall is calculated by _____. A) adding the R-values of all layers B)
averaging the R-values of all layers - CORRECT ANSWER B
, Natural materials like stone and bricks are not good insulation materials. A) True B) False -
CORRECT ANSWER False
Oil is sold in a particular region at $1.60/gal. Its heating value is 117000 BTU/gal. What is the
heating cost per MMBTU? A) $ 0.14/MMBTU B) $ 13675.21/MMBTU C) $ 2.74/MMBTU D)
$ 13.68/MMBTU - CORRECT ANSWER D
Natural gas is sold in the US at $1.03 per CCF. The efficiency of the natural gas furnace is
87.8%. What is the actual cost of heating per MMBTU? Recall that 1 MCF = 1000 Cu. Ft and
has 1000000 BTU; 1 CCF = 100 Cu. Ft and has 100000 BTU. A) $ 0.12/MMBTU B) $
1.17/MMBTU C) $ 11.73/MMBTU D) $ 10.30/MMBTU - CORRECT ANSWER C
A house in State College (HDD=6000) PA has 260 ft2 of windows with R value = 1.8 1720 ft2
of walls with R value = 18 and 1237 ft2 of roof with an R-value = 31. What is the total heat loss
from the house for the season A) 1679419.35 BTUs B) 79309878136.2 BTUs C) 5790600 BTUs
D) 40306064.52 BTUs - CORRECT ANSWER D
In heating mode when the refrigerant liquid moves past the expansion valve it_____. A)
evaporates; absorbing heat from the outside evaporates absorbing heat from the outside
evaporates; absorbing heat from the outside B) evaporates; giving off heat to the outside C)
condenses; absorbing heat from the outside D) condenses; giving off heat to the outside -
CORRECT ANSWER A
High temperature high pressure refrigerant comes out of the compressor and _____. A)
condenses absorbing heat from the inside B) evaporates giving off heat to the inside C)
condenses giving off heat to the inside D) evaporates absorbing heat from the inside -
CORRECT ANSWER C
Balance point - the temperature at which the heat pump output and home heat requirements
match occurs when _____. A) the home heating requirement falls below the heat pump output B)
the heat pump output falls below the home heating requirement C) there is a winter heat wave -
CORRECT ANSWER A
Questions and CORRECT Answers
Which of the following indicates the heating requirement at a particular location? A) Higher
Heating Value B) Coefficient of Performance C) Heating Degree Days D) AFUE - CORRECT
ANSWER C
What is the average cost of electricity in the US? A) $8.0/kWh B) $0.06/MWh C) $80/MWh D)
$60/kWh - CORRECT ANSWER C
What is the most common fuel for home heating in the US? A) Coal B) Oil C) Natural Gas D)
Electricity - CORRECT ANSWER C
In State College PA the average outside temperature during the month of January was 39 degrees
F. Calculate the HDD for the month of January. A) 1209 degree days B) 26 degree days C) 780
degree days D) 806 degree days - CORRECT ANSWER D
A higher HDD indicates a _____. A) Higher heat loss B) Higher fuel requirements C) Higher
temperature difference between inside and outside D) All the above E) None of the above -
CORRECT ANSWER D Feedback: The higher HDD indicates a higher heat loss and
therefore, higher fuel requirements.
What is the process by which energy is transferred by the bulk motion of the fluids? A)
Conduction B) Convection C) Radiation - CORRECT ANSWER B
A thermos bottle has a shiny interior. What type of heat transfer does this prevent? A)
Conduction B) Convection C) Radiation - CORRECT ANSWER C Feedback: Radiation is
transfer of heat through electromagnetic radiation.
The R-value of a composite wall is calculated by _____. A) adding the R-values of all layers B)
averaging the R-values of all layers - CORRECT ANSWER B
, Natural materials like stone and bricks are not good insulation materials. A) True B) False -
CORRECT ANSWER False
Oil is sold in a particular region at $1.60/gal. Its heating value is 117000 BTU/gal. What is the
heating cost per MMBTU? A) $ 0.14/MMBTU B) $ 13675.21/MMBTU C) $ 2.74/MMBTU D)
$ 13.68/MMBTU - CORRECT ANSWER D
Natural gas is sold in the US at $1.03 per CCF. The efficiency of the natural gas furnace is
87.8%. What is the actual cost of heating per MMBTU? Recall that 1 MCF = 1000 Cu. Ft and
has 1000000 BTU; 1 CCF = 100 Cu. Ft and has 100000 BTU. A) $ 0.12/MMBTU B) $
1.17/MMBTU C) $ 11.73/MMBTU D) $ 10.30/MMBTU - CORRECT ANSWER C
A house in State College (HDD=6000) PA has 260 ft2 of windows with R value = 1.8 1720 ft2
of walls with R value = 18 and 1237 ft2 of roof with an R-value = 31. What is the total heat loss
from the house for the season A) 1679419.35 BTUs B) 79309878136.2 BTUs C) 5790600 BTUs
D) 40306064.52 BTUs - CORRECT ANSWER D
In heating mode when the refrigerant liquid moves past the expansion valve it_____. A)
evaporates; absorbing heat from the outside evaporates absorbing heat from the outside
evaporates; absorbing heat from the outside B) evaporates; giving off heat to the outside C)
condenses; absorbing heat from the outside D) condenses; giving off heat to the outside -
CORRECT ANSWER A
High temperature high pressure refrigerant comes out of the compressor and _____. A)
condenses absorbing heat from the inside B) evaporates giving off heat to the inside C)
condenses giving off heat to the inside D) evaporates absorbing heat from the inside -
CORRECT ANSWER C
Balance point - the temperature at which the heat pump output and home heat requirements
match occurs when _____. A) the home heating requirement falls below the heat pump output B)
the heat pump output falls below the home heating requirement C) there is a winter heat wave -
CORRECT ANSWER A
