1. 1 What is carbon monoxide (CO)? a. It is a colorless, odorless, tasteless, inert gas. a. It is a colorless, odorless, tasteless, inert gas. b. It is a colorless, odorless, tasteless, combustible and poisonous gas. b. It is a colorless, odorless, tasteless, combustible and poisonous gas. c. It is a colorless, combustible gas with a disagreeable odor. c. It is a colorless, combustible gas with a disagreeable odor. d. It is a colorless, odorless, tasteless gas supporting combustion. d. It is a colorless, odorless, tasteless gas supporting combustion.

2. 2 How can carbon monoxide be detected? a. With a flame lamp and CO2 tubes. a. With a flame lamp and CO2 tubes. b. With a flame lamp and SO2 detectors. b. With a flame lamp and SO2 detectors. c. By carbon monoxide detectors and by chemical analysis. c. By carbon monoxide detectors and by chemical analysis. d. With a CO2 tester or small bird. d. With a CO2 tester or small bird.

3. 3 What is the source of carbon monoxide? a. It is the result of inadequate ventilation. a. It is the result of inadequate ventilation. b. It is produced as a result of the use of explosives. b. It is produced as a result of the use of explosives. c. It is the product of incomplete combustion (combustion with insufficient oxygen). c. It is the product of incomplete combustion (combustion with insufficient oxygen). d. It is produced when batteries are charged. d. It is produced when batteries are charged.

4. 4 When is carbon monoxide most likely to be found in mines? a. When the barometric pressure falls. a. When the barometric pressure falls. b. When there is a mine fire or after an explosion. b. When there is a mine fire or after an explosion. c. When the barometric pressure rises. c. When the barometric pressure rises. d. When ventilation is less than required by law. d. When ventilation is less than required by law.

5. 5 What is afterdamp? a. The atmosphere deficient in oxygen. a. The atmosphere deficient in oxygen. b. The atmosphere containing carbon monoxide and oxygen. b. The atmosphere containing carbon monoxide and oxygen. c. The atmosphere following an explosion containing carbon dioxide, carbon monoxide, decreased oxygen, nitrogen, hydrogen and smoke. c. The atmosphere following an explosion containing carbon dioxide, carbon monoxide, decreased oxygen, nitrogen, hydrogen and smoke. d. The atmosphere containing sulfur dioxide. d. The atmosphere containing sulfur dioxide.

6. 6 What kind of engines produce carbon monoxide? a. Steam engines. a. Steam engines. b. Electric engines. b. Electric engines. c. Diesel engines. c. Diesel engines. d. Internal combustion engines. d. Internal combustion engines.

7. 7 What is the principal poisonous gas produced by explosives? a. Ammonia nitrate. a. Ammonia nitrate. b. Carbon monoxide. b. Carbon monoxide. c. Nitrogen peroxide. c. Nitrogen peroxide. d. Carbon dioxide. d. Carbon dioxide.

8. 8 What effect does carbon monoxide have on life? a. It is extremely poisonous. a. It is extremely poisonous. b. It supports life and combustion. b. It supports life and combustion. c. It has no effect. c. It has no effect. d. It increased lung ventilation. d. It increased lung ventilation.

9. 9 How does carbon monoxide cause injury to life? a. By preventing breathing. a. By preventing breathing. b. By corroding the lung. b. By corroding the lung. c. By combining with the hemoglobin of the blood and excluding oxygen. c. By combining with the hemoglobin of the blood and excluding oxygen. d. By clotting the blood. d. By clotting the blood.

10. 10 What percentage of carbon monoxide will produce symptoms in several hours? a. Four hundredths of one percent (0.04%). a. Four hundredths of one percent (0.04%). b. Eight hundredths to twelve hundredths of one percent (0.08% to 0.12%). b. Eight hundredths to twelve hundredths of one percent (0.08% to 0.12%). c. Two tenths to three tenths of one percent (.2% to 0.3%). c. Two tenths to three tenths of one percent (.2% to 0.3%). d. Two hundredths of one percent (.02%). d. Two hundredths of one percent (.02%).

11. 11 What percentage of carbon monoxide will produce discomfort in two or three hours? a. Two hundredths of one percent (0.02%). a. Two hundredths of one percent (0.02%). b. Four hundredths of one percent (0.04%) b. Four hundredths of one percent (0.04%) c. Eight hundredths to twelve hundredths of one percent (0.08% to 0.12%). c. Eight hundredths to twelve hundredths of one percent (0.08% to 0.12%). d. Two tenths to three tenths of one percent (0.2% to 0.3%). d. Two tenths to three tenths of one percent (0.2% to 0.3%).

12. 12 What percentage of carbon monoxide will produce a tendency to stagger in one and one-half (1-1/2) hours? a. Two hundredths of one percent (0.02%). a. Two hundredths of one percent (0.02%). b. Two tenths to three tenths of one percent (0.2% to 0.3%). b. Two tenths to three tenths of one percent (0.2% to 0.3%). c. Eight tenths to twenty hundredths of one percent (0.8% to 0.020%). c. Eight tenths to twenty hundredths of one percent (0.8% to 0.020%). d. Eight to twelve hundredths of one percent (.08% - 0.12%) or 800 to 1,200 ppm. d. Eight to twelve hundredths of one percent (.08% - 0.12%) or 800 to 1,200 ppm.

13. 13 What percentage of carbon monoxide will produce symptoms of unconsciousness in thirty (30) minutes? a. Twenty to thirty hundredths of percent (0.20% - 0.30%). a. Twenty to thirty hundredths of percent (0.20% - 0.30%). b. One percent (1.00%). b. One percent (1.00%). c. Thirty hundredths to fifty hundredths percent (0.30% to 0.50%). c. Thirty hundredths to fifty hundredths percent (0.30% to 0.50%). d. Five hundredths of one percent (0.05%). d. Five hundredths of one percent (0.05%).

14. 14 How much greater affinity does hemoglobin have for carbon monoxide than for oxygen? a. About five hundred (500) times. a. About five hundred (500) times. b. About three hundred (300) times. b. About three hundred (300) times. c. About two hundred (200) times. c. About two hundred (200) times. d. About one thousand (1,000) times. d. About one thousand (1,000) times.

15. 15 Why are small quantities of carbon monoxide injurious? a. Because it is not easily thrown off and accumulates in the blood. a. Because it is not easily thrown off and accumulates in the blood. b. It immediately coagulates the blood. b. It immediately coagulates the blood. c. Because it accumulates in the lungs. c. Because it accumulates in the lungs. d. It partially paralyzes the action of breathing. d. It partially paralyzes the action of breathing.

16. 16 What is the specific gravity of carbon monoxide? a. Nine hundred sixty-seven thousandths (0.967). a. Nine hundred sixty-seven thousandths (0.967). b. One and five hundred twenty-nine thousandths (1.529). b. One and five hundred twenty-nine thousandths (1.529). c. Five hundred fifty-five thousandths (0.555). c. Five hundred fifty-five thousandths (0.555). d. One (1.00). d. One (1.00).

17. 17 What is the weight of one (1) cubit foot of carbon monoxide at 60 degrees Fahrenheit and 30.00 inches of mercury pressure? a. Seven hundred sixty-five ten thousandths of one pound (0.0765). a. Seven hundred sixty-five ten thousandths of one pound (0.0765). b. Seven hundred forty ten thousandths of one pound (0.0740). b. Seven hundred forty ten thousandths of one pound (0.0740). c. Four hundred twenty-four ten thousandths of one pound (0.0424). c. Four hundred twenty-four ten thousandths of one pound (0.0424). d. Eleven hundred seventy ten thousandths of one pound (0.1170). d. Eleven hundred seventy ten thousandths of one pound (0.1170).