Environmental Engineering Reference
In-Depth Information
D.
To filter ultraviolet radiation in the stratosphere
E.
To filter ultraviolet radiation in the troposphere
Questions 7-9 refer to the following information.
A CFL bulb using 25 watts of energy is expected to last 10,000 hours. The 100-watt incandescent bulb is
expected to last 1,000 hours. Assume electricity costs 10ยข/kWh.
7.
How much will it cost to operate the CFL over its expected lifetime?
A.
$25
B.
$250
C.
$2,500
D.
$25,000
E.
$250,000
8.
How much will it cost to operate the incandescent bulb over its expected lifetime?
A.
$1
B.
$10
C.
$100
D.
$1,000
E.
$10,000
9.
What is the expected savings in operating costs between the CFL and the incandescent bulb over the ex-
pected life of the CFL bulb?
A.
The incandescent bulb will save $15 over the CFL bulb.
B.
The CFL bulb will save $15 over the incandescent bulb.
C.
The incandescent bulb will save $75 over the CFL bulb.
D.
The CFL bulb will save $75 over the incandescent bulb.
E.
The cost will be the same.
10.
The type of treatment for sewage coming from a house is dependent upon the location of the house and
its access to a municipal treatment system. If a house in the United States is located far from a treatment
system, what form of sewage treatment would it most likely have?
A.
Primary treatment
B.
Secondary treatment
C.
Tertiary treatment
D.
Septic system
E.
No treatment
11.
All the following are considered forms of noise pollution EXCEPT:
A.
Airports
B.
Freeways/highways
C.
Rock concerts
D.
Telephones
E.
Lawnmowers
12.
Which type of plate boundary is the mid-Atlantic ridge?
