Science Bowl

GENERAL SCIENCE

General Science - 15

GENR-92; Multiple Choice:  Electric power is less expensive at night because: 

w)  more hydroelectric generation is brought on line at night. 
x)  there is less demand at night.
y)  pollution control is less stringent at night.
z)  power plants are more efficient at night.

ANSWER:  X -- THERE IS LESS DEMAND AT NIGHT.

GENR-92; Short Answer:  Name THREE TECHNIQUES for removing particulates from flue
gas produced from the combustion of coal?

ANSWER:

(1) ELECTROSTATIC PRECIPITATION (ESP)

(2) FABRIC FILTER OR BAGHOUSE
(3) WET SCRUBBERS
(4) MECHANICAL COLLECTORS OR CYCLONES

GENR-92; Short Answer:  Name TWO sorbents which are used in conventional wet scrubbing
processes to remove SO2 produced by combusting coal. 

ANSWER:    (1) LIME

(2) LIMESTONE
(3) SODIUM SULFITE OR NaCO3 OR NaOH

GENR-92; Short Answer:  Name THREE gaseous components produced when coal is
combusted.

ANSWER:    (1) CO2

(2) SO2
(3) NOX
(4) H2O

GENR-92; Multiple Choice:  Electricity generated by coal-fired power plants i the United States
in 1990 was approximately what percentage of the entire electricity produced by all sources of
power production?

w)  10 percent
x)  25 percent
y)  55 percent
z)  90 percent

ANSWER:  Y -- 55 PERCENT