11

What is carbon dioxide What is carbon dioxide (CO2)? (CO2)?

a. It is a colorless gas with a foul a. It is a colorless gas with a foul odor which is combustible.odor which is combustible.

b. It is a gas formed by the chemical b. It is a gas formed by the chemical combination of sulfur and oxygen.combination of sulfur and oxygen.

c. Carbon dioxide is a colorless, c. Carbon dioxide is a colorless, odorless, combustible gas.odorless, combustible gas.

d. Carbon dioxide is a colorless and d. Carbon dioxide is a colorless and odorless gas formed by the chemical odorless gas formed by the chemical combination of carbon and oxygen.combination of carbon and oxygen.

22

How is carbon dioxide formed How is carbon dioxide formed in a mine? in a mine?

a. By combustion, by breathing of a. By combustion, by breathing of miners and animals.miners and animals.

b. By the decay of vegetable b. By the decay of vegetable matter.matter.

c. By the oxidation of coal by c. By the oxidation of coal by chemical action of acid water on chemical action of acid water on carnonates.carnonates.

d. All the above.d. All the above.

33

What is a product of complete What is a product of complete combustion? combustion?

a. Carbon Monoxide.a. Carbon Monoxide. b. Hydrogen.b. Hydrogen. c. Nitrogen.c. Nitrogen. d. Carbon dioxide.d. Carbon dioxide.

44

What is the specific gravity of What is the specific gravity of carbon dioxide? carbon dioxide?

a. Five hundred fifty-five one-a. Five hundred fifty-five one-thousands (0.555).thousands (0.555).

b. One (1.000)b. One (1.000) c. Nine hundred sixty-five one-c. Nine hundred sixty-five one-

thousands (0.967).thousands (0.967). d. One and five hundred twenty-d. One and five hundred twenty-

nine one-thousands (1.529).nine one-thousands (1.529).

55

What is the weight of one (1) cubic What is the weight of one (1) cubic foot of carbon dioxide at 60 degrees foot of carbon dioxide at 60 degrees Fahrenheit and 30.00 inches mercury Fahrenheit and 30.00 inches mercury

pressure?pressure? a. Seven hundred sixty-five ten a. Seven hundred sixty-five ten

thousandths (0.765) pounds.thousandths (0.765) pounds. b. Eleven hundred seventy ten b. Eleven hundred seventy ten

thousandths (0.1170) pounds.thousandths (0.1170) pounds. c. Eight hundred forty-six ten c. Eight hundred forty-six ten

thousandths (0.846) pounds.thousandths (0.846) pounds. d. Four hundred twenty-four ten d. Four hundred twenty-four ten

thousandths (0.0424) pounds.thousandths (0.0424) pounds.

66

Is carbon dioxide Is carbon dioxide combustible? combustible?

a. Yes, it can explode at any a. Yes, it can explode at any temperature.temperature.

b. Yes, it can explode only at high b. Yes, it can explode only at high temperatures.temperatures.

c. No.c. No. d. Yes, but only at low d. Yes, but only at low

temperatures.temperatures.

77

Where might concentrated Where might concentrated accumulations of carbon dioxide accumulations of carbon dioxide

ordinarily be found?ordinarily be found? a. Near the roof.a. Near the roof. b. Near the floor, in inadequately b. Near the floor, in inadequately

ventilated places.ventilated places. c. Along the belt lines.c. Along the belt lines. d. In well ventilated places.d. In well ventilated places.

88

What effect does carbon What effect does carbon dioxide have upon life?dioxide have upon life?

a. Lung ventilation is decreased.a. Lung ventilation is decreased. b. It has no effect.b. It has no effect. c. Lung ventilation is increased as carbon c. Lung ventilation is increased as carbon

dioxide increases. When five percent dioxide increases. When five percent (5%) of carbon dioxide is present lung (5%) of carbon dioxide is present lung ventilation has increased three hundred ventilation has increased three hundred percent (300%) and breathing is percent (300%) and breathing is laborious and continued exposure is laborious and continued exposure is injurious.injurious.

d. It is extremely poisonous.d. It is extremely poisonous.

99

How is carbon dioxide How is carbon dioxide detected? detected?

a. By the galvanometer.a. By the galvanometer. b. By the iodine peroxide detector.b. By the iodine peroxide detector. c. By the photonic method.c. By the photonic method. d. Usually by a chemical analysis.d. Usually by a chemical analysis.

1010

What percent of carbon dioxide is What percent of carbon dioxide is given off by the body during given off by the body during

exhalation?exhalation? a. Approximately 2.6 to 6.6 percent.a. Approximately 2.6 to 6.6 percent. b. Approximately 26 to 66 percent.b. Approximately 26 to 66 percent. c. Approximately 16 to 20 percent.c. Approximately 16 to 20 percent. d. Approximately 1.6 to 2.0 percent.d. Approximately 1.6 to 2.0 percent.