11

What is sulfur dioxide What is sulfur dioxide (SO2)?(SO2)?

a. A colorless, suffocating, irritating, a. A colorless, suffocating, irritating, poisonous gas.poisonous gas.

b. A colorless, odorless, combustible b. A colorless, odorless, combustible gas.gas.

c. A noncombustible, poisonous gas.c. A noncombustible, poisonous gas. d. A combustible, nonpoisonous d. A combustible, nonpoisonous

gas.gas.

22

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

a. By burning coal containing pyrites a. By burning coal containing pyrites or by the firing of black powder.or by the firing of black powder.

b. By decomposing hydrogen b. By decomposing hydrogen compounds.compounds.

c. By burning coal not containing c. By burning coal not containing pyrites or by the firing of nitrates.pyrites or by the firing of nitrates.

d. By decomposing nitrogen d. By decomposing nitrogen compounds.compounds.

33

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

a. One and five hundred twenty-a. One and five hundred twenty-nine one-thousandths (1.529).nine one-thousandths (1.529).

b. Two and two hundred sixty-three b. Two and two hundred sixty-three one-thousandths (2.263).one-thousandths (2.263).

c. Five hundred fifty-five one-c. Five hundred fifty-five one-thousandths (0.555).thousandths (0.555).

d. Nine hundred sixty-seven one-d. Nine hundred sixty-seven one-thousandths (0.967).thousandths (0.967).

44

What is the weight of a cubic foot of What is the weight of a cubic foot of sulfur dioxide at 60 degree sulfur dioxide at 60 degree

Fahrenheit and 30.00 inches of Fahrenheit and 30.00 inches of mercury pressure?mercury pressure?

a. Seven hundred sixty-five ten a. Seven hundred sixty-five ten thousandths (0.0765) pounds.thousandths (0.0765) pounds.

b. Eleven hundred seventy ten b. Eleven hundred seventy ten thousandths (0.1170) pounds.thousandths (0.1170) pounds.

c. Twelve hundred seventeen ten c. Twelve hundred seventeen ten thousandths (0.1217) pounds.thousandths (0.1217) pounds.

d. Seventeen hundred thirty-three d. Seventeen hundred thirty-three ten thousandths (0.1733) pound.ten thousandths (0.1733) pound.

55

What is the particular danger What is the particular danger of sulfur dioxide?of sulfur dioxide?

a. It is extremely combustible.a. It is extremely combustible. b. It caused oxygen deficiency.b. It caused oxygen deficiency. c. It is extremely poisonous even in c. It is extremely poisonous even in

small amounts.small amounts. d. It may cause coal dust d. It may cause coal dust

explosions.explosions.

66

How is sulfur dioxide How is sulfur dioxide detected? detected?

a. By chemical analysis.a. By chemical analysis. b. By the sense of smell and its b. By the sense of smell and its

effect on the air passages.effect on the air passages. c. By the use of litmus paper.c. By the use of litmus paper. d. By its pale yellow color.d. By its pale yellow color.

77

What is the first effect on a What is the first effect on a person exposed to sulfur person exposed to sulfur

dioxide?dioxide? a. It is extremely irritating and a. It is extremely irritating and

suffocating and is intolerable to suffocating and is intolerable to breathe.breathe.

b. Lung ventilation is increased.b. Lung ventilation is increased. c. It has the odor of rotten eggs.c. It has the odor of rotten eggs. d. The eyes water.d. The eyes water.

88

Is sulfur dioxide Is sulfur dioxide combustible? combustible?

a. Yes, extremely combustible.a. Yes, extremely combustible. b. Only when present with carbon b. Only when present with carbon

dioxide.dioxide. c. No, it is incombustible.c. No, it is incombustible. d. Only when present with methane.d. Only when present with methane.