2022 Southeast Regional Mine Rescue Contest
Written Exam – Metal

Name:____________________________
Team:_____________________________
Draw #:_____________ Position #:______

1.	The purpose of mine ventilation is to provide a ____________ of air sufficient to disperse and remove harmful gases, dust, smoke, and fumes, and to provide adequate oxygen.
a.	Current
b.	Mass
c.	Volume (3-24)
d.	Flow

2.	If the weight of a gas you’re testing for is lighter than normal air, you’ll know to test for it within ______ inches of the roof.
a.	24
b.	10
c.	14 
d.	12 (2-2)

3.	Sulfur dioxide has a specific gravity of _____________ .
a.	2.2538
b.	2.2638 (2-2)
c.	2.2422
d.	BR549

4.	It’s much easier for concentrations of explosive gases to build up when the barometric pressure is ___________.
a.	Low
b.	Medium 
c.	High (2-2)
d.	Cold

5.	Breathing air containing 5 percent carbon dioxide increases respiration ______ percent, causing difficult breathing.
a.	300 (2-8)
b.	400
c.	500
d.	600

6.	For example, the TLV for carbon monoxide (CO) is relatively low—50 PPM (or .005 percent). This means that the most CO you can be exposed to over an 8-hour daily period without harmful effects is ________ of one percent.
a.	1/300
b.	1/100
c.	1/200 (2-4).
d.	2/4

7.	If you wear your SCBA in petroleum-based fumes for prolonged or successive periods, the fumes can eventually ____________ its rubber parts so that the apparatus no longer provides you with adequate protection
a.	Deteriorate
b.	Permeate (2-4)
c.	Ruin
d.	Destroy

8.	Propane has a specific gravity of __________ .
a.	1.0493
b.	2.0100
c.	1.5486
d.	1.5625 (2-11)

9.	A mixture of carbon dioxide, nitrogen, and air make up ______________ .
a.	Afterdamp
b.	Stinkdamp
c.	Blackdamp (2-16)
d.	Firedamp

10.	A mixture of carbon monoxide and air make up ________________ . 
a.	Blackdamp
b.	Whitedamp (2-15)
c.	Afterdamp
d.	Firedamp

11.	The particles in __________ are usually soot or carbon, and tar-like substances such as hydrocarbons.
a.	Gases
b.	Toxins
c.	Smoke (2-15)
d.	Exhausts
12.	Mines having little overburden may have surface cracks, a ____________ fan is used so that any air that leaks through the cracks will leak away from the mine, not into the mine.
a.	Booster
b.	Intake
c.	Exhaust
d.	Blower (3-24)

13.	In order to get the air to flow from the intake to the return, the return air must be at a __________ pressure than the intake.
a.	Lower (3-24)
b.	Higher
c.	Equal
d.	Different

14.	The smoke tube is a device that emits a smoke cloud which floats along with the air current to show the direction of the airflow and the approximate ________ of the airflow.
a.	Current 
b.	Speed 
c.	Velocity (3-36)
d.	Reading

15.	Sometimes, ___________ are stationed at the fresh air base to carry messages from the fresh air base to the command center in the event of a communication breakdown.
a.	Helpers
b.	Assistants
c.	Runners (4-55)
d.	Members

16.	To advance the fresh air base, the team will have to __________ a new air lock at the site of the new fresh air base and put up any additional temporary bulkheads in parallel entries that are needed to seal off the area at that point so that fresh air can be advanced.
a.	Build (4-55)
b.	Erect
c.	Create
d.	Prepare

17.	For rescue work, you will also wear a metal ring on your mine belt so you can hook onto a linkline, and it is common practice for everyone to wear a _____________ .
a.	Rescuer
b.	Underwear
c.	Watch (4-59)
d.	5-11 Jacket

18.	Just before the team begins to travel inby the Fresh Air Base, the __________________ should be sure to write down the time of departure.
a.	Fresh air base attendant
b.	Team captain (4-64)
c.	Fresh air base coordinator
d.	Map man

19.	Wheeled extinguishers can weigh from _____ to 350 pounds.
a.	50
b.	75 (5-88)
c.	80
d.	100
20.	Ventilation should always be continued through the mine during a fire in order to carry explosive gases and ____________ away from the fire area and to direct the smoke, heat, and flames away from the team.
a.	Toxins
b.	Air
c.	Distillates (5-95)
d.	Oxygen

21.	If the fire begins to back up against the intake air in search of oxygen, you can put up a _____________ brattice (or hurdle brattice) from side to side leaving an open space at the top.
a.	Partial
b.	Temporary
c.	Curtain
d.	Transverse (5-97)

22.	Working in a hot and/or steamy atmosphere will tend to make you more exhausted than normal and cause additional ___________ on your system, especially if you’re working hard. 
a.	Strain
b.	Heat
c.	Stress (5-99)
d.	Drainage

23.	Miners who barricade themselves into an area will usually try to leave ____________ of where they are barricaded to aid rescuers in finding them.
a.	Clues
b.	Indications (6-116)
c.	Examples
d.	Signs

24.	The safest ____________ for getting survivors out is usually to advance fresh air to the barricade by the quickest means possible.
a.	Way 
b.	Process 
c.	Technique 
d.	Procedure (6-117)

25.	The advantage of _________________ ventilation is that gas conditions can be carefully controlled, and the operation can be halted at any point in which conditions become hazardous.
a.	Direct
b.	Progressive (7-122)
c.	Staged
d.	Controlled

26.	Power is usually restored _________________ by an electrician as the ventilation is advanced.
a.	Directly
b.	Automatically
c.	Progressively (7-127)
d.	Passively

27.	What are some preconditions for opening a sealed fire area?
a.	The oxygen content of the atmosphere in the sealed area should be low enough so that an explosion is impossible.
b.	There should be no carbon monoxide, indicating that the fire is out.
c.	The sealed area should have cooled enough so that the fire is not rekindled when the area is re-ventilated.
d.	All the above. (7-123)
28.	If they are available, ___________________, which are spring-loaded expandable metal rods, can be used instead of posts to erect temporary bulkheads.
a.	Paint poles
b.	Extendorods
c.	Pogo sticks (3-42)
d.	Loading poles

29.	When survivors are located, the ____________, time, and date should be marked on the team’s map and marked on the side in the passageway where they were found.
a.	Condition
b.	Blood type
c.	Location (6-117)
d.	Name

30.	It is often recommended that all possible electrical conductors (track, pipe, wires, etc.) be __________ so that the affected area beyond the fresh air base is isolated from any possible stray or direct current. 
a.	Cut
b.	Disconnected
c.	Severed (4-53)
d.	Isolated