<div style='text-shadow: 0.08em 0.08em #000'>2011 North Central Regional Technician Team Exam (11-20)</div>

11. A regulator is an adjustable door or opening in a stopping used to control and adjust the quantity of airflow.

There is no difference.
"Caved" means ground that has fallen. "Caved tight" means ground that has fallen which allows no ventilation to pass.
"Caved" means ground that has fallen, but which allows a mine rescue team to pass through. "Caved tight" means ground that has fallen, but which is impassable by a mine rescue team.
None of the above.

There is no difference.
"Team line" means the line that connects team members to each other.  "Lifeline" means the short lines that are used to connect individual team members to the "team line."
"Lifeline" means the line that connects team members to each other.  "Team line" means the short lines that are used to connect individual team members to the "lifeline."
"Team line" means the communication line or cable that connects the team to the fresh air base.  "Lifeline" means the line that connects team members to each other.
None of the above.

14. A medium velocity vane type anemometer is used to measure ventilation through a heading that is 40 feet wide by 30 feet high. The anemometer reading is 105 feet, and the reading was taken over a period of 1 minute and 30 seconds. What is the airflow through the heading?

126,000 cfm
12,600 cfm
84,000 cfm
189,000 cfm
The correct airflow cannot be determined.

15. In the context of a mine rescue operation, a backup team refers to a fully equipped mine rescue team that is ready for deployment, but is held in reserve on surface in case the team that is underground requires immediate assistance.

16. In the context of first aid rendered by a first responder team, is checking for a medic alert bracelet or necklace part of a primary assessment, secondary assessment, or neither?

Primary assessment
Secondary assessment
Neither

17. For the technician team event at a MNM mine rescue contest, the team is required to conduct a stretcher weight-bearing test.

18. For the technician team event at a MNM mine rescue contest, what are the high and low alarm set points that are specified for the nitrogen dioxide (NO₂) sensor in a multi-gas meter?

6.0% and 3.0%.
6.5% and 3.5%.
6.5% and 3.0%.
5.0% and 3.0%.
none of the above

fuming sulfuric acid
a mixture of chalk and quicklime
a mixture of tin oxide and titanium dioxide
a mixture sodium bisulfite and dilute thioglycolic acid
none of the above

20. Upon entering an underground mine, a faint odor of rotten eggs is detected. What gas would be expected, where would it be expected to collect, and why is it important to measure?

Sulfur dioxide, near the floor, indicates a possible sulfide ore fire and/or sulfide dust explosion
Hydrogen sulfide, near the floor, indicates boiling in a lead-acid battery leading to possible battery explosion
Acetylene, near the roof, flammable and explosive gas
Hydrogen sulfide, near the floor, highly toxic gas
none of the above

•	Questions 1-10
•	Questions 11-20
•	Questions 21-30