EGEE – Exam 3 – Energy and Environmental Engineering – study
material
which of the following provides the most insulation?
A. 6 inches of cellulose
B. 6 inches of fiberglass
C. 6 inches of common brick - ANS ✔✔A (cellulose)
you are warmed by the sun. This is an example of heat transfer by _____ - ANS
✔✔radiation
On cloudless nights, heat escapes from our planet and goes into space. What is
this due to? - ANS ✔✔radiation
What is the process by which energy is transferred by the bulk motion of fluids? -
ANS ✔✔convection
Oil is sold in a particular region at $1.10/gal and natural gas at $11.47 per MCF.
Given that the oil has a hearing value of 140,000 BTUs/gal and natural gas of 1
MMBtu/MCF, which fuel is cheaper to use? - ANS ✔✔Oil
in state college the average outside temperature during the month of January
was 40F. Calculate HDD for January. - ANS ✔✔775 (HDD= base-average x #days)
How many degree days are accumulated in a 7 day period where the average
outside temperature is 30F? - ANS ✔✔245 (HDD= (65-30)x7)
,Natural gas is sold in the US at $1.50 per CCF. What is the cost of heating per
MMBTU? 1 MCF = 1,000 Cu. Ft and has 1,000,000 BTU; 1 CCF = 100 Cu. Ft and has
100,000 BTU - ANS ✔✔$15.00/MMBTU (conversions)
Home heating is the sinlge highest energy expense for a household. T/F - ANS
✔✔true
natural materials like stone and bricks are not good insulation materials T/F - ANS
✔✔true
when using a fire place, most of the heated air is lost through the chimney. T/F -
ANS ✔✔true
HDD is used to estimate the amount of energy required for residential space
heating during a cool season. T/F - ANS ✔✔true
What does the R-value of thermal insulation depend on?
A. type of material
B. thickness
C. density
D. all of the above - ANS ✔✔D (all of the above)
what is the process in which heat is transferred through electromagnetic
radiation? - ANS ✔✔radiation
what is the typical cost of natural gas per million BTUs? - ANS ✔✔5
, to calculate the heating degree days for a particular days, the day's outside
temperature is calculated by? - ANS ✔✔adding the low and high temperatures
and then dividing by 2
most of the synthetic insulation products are very _____ insulation materials -
ANS ✔✔effective
The R-value of a composite wall is calculated by ______ the effective R-values of
each of the layers of the wall - ANS ✔✔adding
heat in the room moves with the arm currents from warmer areas to cooler areas
due to? - ANS ✔✔convection
Heating _____ days is a measure of heating requirement at a particular location -
ANS ✔✔degree
conduction is a process by which energy is conducted down the rod as the ____ of
one molecule are passed to the next - ANS ✔✔vibrations
average cost of electricity in the US is $0/08 per kWh. This is the same as $80 per?
- ANS ✔✔mwh
what is the most common fuel for home heating in the US? - ANS ✔✔natural
gas
most of the energy used at home is used for? - ANS ✔✔heating
material
which of the following provides the most insulation?
A. 6 inches of cellulose
B. 6 inches of fiberglass
C. 6 inches of common brick - ANS ✔✔A (cellulose)
you are warmed by the sun. This is an example of heat transfer by _____ - ANS
✔✔radiation
On cloudless nights, heat escapes from our planet and goes into space. What is
this due to? - ANS ✔✔radiation
What is the process by which energy is transferred by the bulk motion of fluids? -
ANS ✔✔convection
Oil is sold in a particular region at $1.10/gal and natural gas at $11.47 per MCF.
Given that the oil has a hearing value of 140,000 BTUs/gal and natural gas of 1
MMBtu/MCF, which fuel is cheaper to use? - ANS ✔✔Oil
in state college the average outside temperature during the month of January
was 40F. Calculate HDD for January. - ANS ✔✔775 (HDD= base-average x #days)
How many degree days are accumulated in a 7 day period where the average
outside temperature is 30F? - ANS ✔✔245 (HDD= (65-30)x7)
,Natural gas is sold in the US at $1.50 per CCF. What is the cost of heating per
MMBTU? 1 MCF = 1,000 Cu. Ft and has 1,000,000 BTU; 1 CCF = 100 Cu. Ft and has
100,000 BTU - ANS ✔✔$15.00/MMBTU (conversions)
Home heating is the sinlge highest energy expense for a household. T/F - ANS
✔✔true
natural materials like stone and bricks are not good insulation materials T/F - ANS
✔✔true
when using a fire place, most of the heated air is lost through the chimney. T/F -
ANS ✔✔true
HDD is used to estimate the amount of energy required for residential space
heating during a cool season. T/F - ANS ✔✔true
What does the R-value of thermal insulation depend on?
A. type of material
B. thickness
C. density
D. all of the above - ANS ✔✔D (all of the above)
what is the process in which heat is transferred through electromagnetic
radiation? - ANS ✔✔radiation
what is the typical cost of natural gas per million BTUs? - ANS ✔✔5
, to calculate the heating degree days for a particular days, the day's outside
temperature is calculated by? - ANS ✔✔adding the low and high temperatures
and then dividing by 2
most of the synthetic insulation products are very _____ insulation materials -
ANS ✔✔effective
The R-value of a composite wall is calculated by ______ the effective R-values of
each of the layers of the wall - ANS ✔✔adding
heat in the room moves with the arm currents from warmer areas to cooler areas
due to? - ANS ✔✔convection
Heating _____ days is a measure of heating requirement at a particular location -
ANS ✔✔degree
conduction is a process by which energy is conducted down the rod as the ____ of
one molecule are passed to the next - ANS ✔✔vibrations
average cost of electricity in the US is $0/08 per kWh. This is the same as $80 per?
- ANS ✔✔mwh
what is the most common fuel for home heating in the US? - ANS ✔✔natural
gas
most of the energy used at home is used for? - ANS ✔✔heating
