EGEE 102 Exam 3 ACTUAL UPDATED
Exam Questions and CORRECT Answers
A wall consists of 0.5" wood siding (R = 0.81), 0.75" plywood (R = 0.94), 1.6" of fiberglass (R =
3.7 per inch) and 0.5" plasterboard (R = 0.45). What is the composite R-value of the wall?
A ) 7.5
B ) 7.26
C ) 8.12
D ) 5.9 - CORRECT ANSWER C ) 8.12
A room has a wall with an R value of 13 F sq.ft. hr/BTU. The room is 13 feet long and 12 feet
wide with walls that are 8 ft high. On a particular day the average outside temperature is 25
degrees F. How much heat is transferred through the walls on that day (in BTUs)?
A ) 92160 BTUs
B ) 1230.8 BTUs
C ) 29538.5 BTUs
D ) 1846.2 BTUs - CORRECT ANSWER C ) 29538.5 BTUs
On cloudless nights, heat escapes from our planet and goes into space. What is this due to?
A ) Conduction
B ) Convection
C ) Radiation
D ) Radiation and Convection - CORRECT ANSWER C ) Radiation
The number of degrees the mean temperature falls below 65 degrees F for a given day is
indicated by _____ .
A ) HDD
B ) CDD
C ) Heat Index - CORRECT ANSWER A ) HDD
, A room has a wall with an R value of 18 F sq.ft. hr/BTU. The room is 15 feet long and 11 feet
wide with walls that are 9 ft high. On a particular day the average outside temperature is 40
degrees F. How much heat is transferred through the walls on that day (in BTUs)?
A ) 15600
B ) 650 - CORRECT ANSWER A ) 15600
What is the process by which energy is passed as the vibrations of one molecule are passed to the
next, but there is no movement of energetic atoms or molecules?
A ) Conduction
B) Convection
C) Radiation - CORRECT ANSWER A ) Conduction
The heat loss through a window (R-1) is 10 MMBTU/year. Calculate the payback period (in
years) if Argon is filled in the window to increase the effective R-value of the window to 7.
Assume heating price to be $10/MMBTU and the cost for filling Argon is $20.
A ) 0.2 years
B ) 0.23 years
C ) 1.4 years
D ) -0.03 years - CORRECT ANSWER B ) 0.23 years
165 CCF of natural gas is equivalent to how many kWh of Electricity?
A ) 4835.87 KWH
B ) 483.59 KWH
C ) 48358.73 KWH
D ) 48.36 KWH - CORRECT ANSWER A ) 4835.87 KWH
Natural gas is sold in the US at $1.50 per CCF. What is the cost of heating per MMBTU? Recall
that 1 MCF = 1,000 Cu. Ft and has 1,000,000 BTU; 1 CCF = 100 Cu. Ft and has 100,000 BTU.
A ) $ 1.50/MMBTU
Exam Questions and CORRECT Answers
A wall consists of 0.5" wood siding (R = 0.81), 0.75" plywood (R = 0.94), 1.6" of fiberglass (R =
3.7 per inch) and 0.5" plasterboard (R = 0.45). What is the composite R-value of the wall?
A ) 7.5
B ) 7.26
C ) 8.12
D ) 5.9 - CORRECT ANSWER C ) 8.12
A room has a wall with an R value of 13 F sq.ft. hr/BTU. The room is 13 feet long and 12 feet
wide with walls that are 8 ft high. On a particular day the average outside temperature is 25
degrees F. How much heat is transferred through the walls on that day (in BTUs)?
A ) 92160 BTUs
B ) 1230.8 BTUs
C ) 29538.5 BTUs
D ) 1846.2 BTUs - CORRECT ANSWER C ) 29538.5 BTUs
On cloudless nights, heat escapes from our planet and goes into space. What is this due to?
A ) Conduction
B ) Convection
C ) Radiation
D ) Radiation and Convection - CORRECT ANSWER C ) Radiation
The number of degrees the mean temperature falls below 65 degrees F for a given day is
indicated by _____ .
A ) HDD
B ) CDD
C ) Heat Index - CORRECT ANSWER A ) HDD
, A room has a wall with an R value of 18 F sq.ft. hr/BTU. The room is 15 feet long and 11 feet
wide with walls that are 9 ft high. On a particular day the average outside temperature is 40
degrees F. How much heat is transferred through the walls on that day (in BTUs)?
A ) 15600
B ) 650 - CORRECT ANSWER A ) 15600
What is the process by which energy is passed as the vibrations of one molecule are passed to the
next, but there is no movement of energetic atoms or molecules?
A ) Conduction
B) Convection
C) Radiation - CORRECT ANSWER A ) Conduction
The heat loss through a window (R-1) is 10 MMBTU/year. Calculate the payback period (in
years) if Argon is filled in the window to increase the effective R-value of the window to 7.
Assume heating price to be $10/MMBTU and the cost for filling Argon is $20.
A ) 0.2 years
B ) 0.23 years
C ) 1.4 years
D ) -0.03 years - CORRECT ANSWER B ) 0.23 years
165 CCF of natural gas is equivalent to how many kWh of Electricity?
A ) 4835.87 KWH
B ) 483.59 KWH
C ) 48358.73 KWH
D ) 48.36 KWH - CORRECT ANSWER A ) 4835.87 KWH
Natural gas is sold in the US at $1.50 per CCF. What is the cost of heating per MMBTU? Recall
that 1 MCF = 1,000 Cu. Ft and has 1,000,000 BTU; 1 CCF = 100 Cu. Ft and has 100,000 BTU.
A ) $ 1.50/MMBTU
