deck_3558893 Flashcards
1
Q
- During extremely heavy work, the body uses lpm of oxygen.a) .5 to 1b) .75 to 1c) 2 to 3 d) 4 to 5
A
c) 2 to 3
2
Q
- Dead air space is commonly used for refuge stations in potash mines. When determining the appropriate dead air space per occupant, what is the upper design limit for carbon dioxide? % ppma) 2% 20,000b) 3% 3,000c) 4% 4,000d) 3% 30,000 e) 2% 2,000
A
d) 3% 30,000
3
Q
- Fill in the following values for the gas mixture assuming that gas “X” was evenly distributed when it was introduced into the air.Gas “X” = 25% Oxygen = Nitrogen = a) 13.5,55.7b) 14.3,56.4c) 15.7,58.5 d) 17.1,32.3
A
c) 15.7,58.5
4
Q
- Toxicity of a gas depends on what?a) the physical propertiesb) the concentration and specific gravityc) exposure time and concentration
A
c) exposure time and concentration
5
Q
- Stratification of gases underground may occur due to :a) dilutionb) inadequate ventilation c) presence of waterd) gases of similar density
A
b) inadequate ventilation
6
Q
Hydrostatic pressure determines the of the cylinder.a) maximum pressureb) negative pressurec) elastic expansiond) exploding limit
A
c) elastic expansion
7
Q
Oxygen cylinders are hydrostatically tested at: a) 3000 psib) 3300 psic) 4000 psid) 4400 psi
A
d) 4400 psi
8
Q
Self-contained open circuit breathing apparatus may use the following gas? a) liquid oxygenb) chemically produced oxygenc) compressed pure breathing aird) compressed industrial grade oxygen
A
c) compressed pure breathing air
9
Q
- When wearing a mask or breathing apparatus, you should breathe? a) fast and shallowb) fast and deepc) slow and shallowd) slow and deep
A
d) slow and deep
10
Q
- The lubricant mixture that can be safely used in an oxygen booster pump is?a) 4 parts glycerin to 1 part waterb) 1 part glycol to 4 parts waterc) 1 part glycerin to 4 parts waterd) 1 part glycol to 4 parts watere) none of these mixture scan be used
A
c) 1 part glycerin to 4 parts water
11
Q
- Oil or grease on a high-pressure oxygen connection could:a) burst into flamesb) explodec) gum up connectiond) none of the above
A
b) explode
12
Q
- Self-contained closed circuit breathing apparatus may use the following gases EXCEPT:a) compressed oxygenb) liquid oxygenc) chemically produced oxygend) compressed pure breathing air
A
d) compressed pure breathing air
13
Q
One of the most important functions of any closed circuit, self-contained breathing apparatus is the elimination of?a) CO2 b) NO2 c) COd) CL
A
a) CO2
14
Q
- Do not store rubber, neoprene or silicone parts undera) high pressureb) fluorescent lights c) waterd) dark conditions
A
b) fluorescent lights
15
Q
Oxygen in rescue apparatus must contain oxygen, no and not more than2% a) 96%, carbon dioxide,nitrogenb) 98%, carbon monoxide,nitrogenc) 98%, hydrogen,nitrogen d) 99%, hydrogen, carbon dioxide
A
c) 98%, hydrogen,nitrogen
16
Q
- All compressed oxygen gas cylinders over cm in diameter must be hydrostically tested every years.a) 30,6b) 30,5c) 5,5 d) 5,4
A
c) 5,5
17
Q
Which of the following does NOT meet the requirements of an underground ventilation system?a) sufficient air movement throughout the mine to prevent the formation of pockets of stale, stagnant airb) sufficient airflow to remove dust from the mine c) sufficient fresh air to limit air pollution from all sourcesd) lower air temperature and humidity
A
b) sufficient airflow to remove dust from the mine
18
Q
- Which of the following is not an auxiliary ventilation category?a) quantity controlb) temperature-humidity controlc) pressure controld) quality control
A
c) pressure control
19
Q
- Pressure losses can be attributed to:a) abrupt changes in airflow direction changesb) leakage lossesc) restricted openingsd) all of the above
A
d) all of the above
20
Q
- You have airflow of 500 fpm in a drift of 15 ft. x 10 ft. What is your volume?a) 7,500 cfmb) 75,000 cfmc) 750 cfm d) 750,000 cfm
A
b) 75,000 cfm
21
Q
- An anemometer is used to measure velocity of meters per minute.a) 10 to 60b) 20 to 100c) 40 to 610 d) 60 to 720
A
c) 40 to 610
22
Q
- A ventilation regulator is an artificial resistance installed in a split.a) low resistance b) high resistancec) high volume d) low volume
A
a) low resistance
23
Q
- Surface fans supplying fresh air to the mine as well as surface exhaust fans are:a) low pressure, high volumeb) high pressure, high volume c) low pressure, low volume d) high pressure, low volume
A
a) low pressure, high volume
24
Q
- Air speeds of up to are not uncommon in Saskatchewan mines.a) 22 kph or 13 mph b) 25 kph or 15 mphc) 30 kph or 18 mphd) 32 kph or 19 mph
A
a) 22 kph or 13 mph
25
Q
- To indicate that an extinguisher is safe to use live electricity, it will have a “C” in circle of what colour?a) yellowb) blue c) redd) green
A
b) blue
26
Q
- What stage are you at when you have a free-burning phase fire? a) 1st b) 2nd c) 3rdd) 4th
A
b) 2nd
27
Q
- If hydrogen and oxygen combine, what is produced?a) white smokeb) black smokec) toxic gasd) water vapour
A
d) water vapour
28
Q
- Which of the following is NOT a good reason for unsealing a mine fire?a) oxygen level is low enough to eliminate possibility of explosionb) pressure on fire seal has dissipated c) carbon monoxide level has been reduced to a safe leveld) temperature has cooled well below point of ignition
A
b) pressure on fire seal has dissipated
29
Q
- Frostbite is possible when there is skin contact with this extinguishing agent.a) waterb) dry chemicalc) carbon dioxide d) dry powder
A
c) carbon dioxide
30
Q
- About % of all fire deaths are unexplained by carbon monoxide or other clear causes.a) 10 b) 20c) 30d) 40
A
a) 10
31
Q
- Mine rescue teams may encounter a phenomenon called when working in dense smoke.a) initial orientationb) spatial disorientation c) limited visibilityd) sensitivity deprivation
A
b) spatial disorientation
32
Q
- T or F If a mine rescue teams retraces its steps; route markers should be cancelled.
A
TRUE
33
Q
- In temperatures of approximately 450 C (1100 F)dry bulb reading and 380 C(1100 F) wet bulb reading, the mount of time spent under oxygen may have to be reduced to minutes.a) 10 b) 20c) 30d) 60
A
b) 20
34
Q
- It is necessary to mine openings so no unauthorised persons enter the area and may be exposed to toxic gases.a) measureb) check and guard c) observed) cover
A
b) check and guard
35
Q
- When marking route of travel with spray paint or chalk, an arrow should be drawn:a) on the right wall b) on the left wall c) on the groundd) pointing in the direction the team is advancing
A
a) on the right wall
36
Q
- Which horn signal is not correct?a) one-stopb) two-advancec) three-retreatd) four-rest
A
d) four-rest
37
Q
- The most common type of permanent roof support is the:a) postb) timber setc) cribd) roof bolt
A
d) roof bolt
38
Q
- Timber supports are called:a) temporary roof supports b) conventional roof supports c) contemporary supportsd) permanent roof supports
A
b) conventional roof supports
39
Q
- T or F. Mine rescue teams should never alter ventilation systems without direct orders from the control centre, unless the effects are known and all the people in the mine are accounted for.
A
TRUE
40
Q
- Which of the following is not a good reason for sounding the back during a rescue mission?a) when visibility does not permit visual checksb) slabs of roof or backs are found are found on the floorc) when backs have been subjected to extreme heatd) after erecting a safety seal e) the team intends to erect a seal, line brattice, or post.
A
d) after erecting a safety seal
41
Q
- If the spare cylinder carried by the team has to be used in one of the SCBAs, the team musta) replace the cylinder and continueb) return to the fresh air base c) use the manual booster after installationd) check the pressure in the cylinder before installing
A
b) return to the fresh air base
42
Q
- Which is not a proper guideline when using vehicles during a rescue mission?a) captain and vice captain should drive the vehicles b) distance between vehicles should be as short as possiblec) contact by radios, horns,lights and hand signalsd) at least 2 persons on each vehicle
A
a) captain and vice captain should drive the vehicles
43
Q
- is the result of an injury where air gets into the chest cavity. a) penetrating chest wound b) paradoxical chest movement c) pneumothorax d) flail chest
A
c) pneumothorax
44
Q
- Before opening a fire seal a(n) must be installed.a) square setb) miner’s sealc) extinguisherd) air lock
A
d) air lock
45
Q
- The inhalator consists of a litre capacity oxygen cylinder capable of delivering at least litres per minute.a) 300,10 b) 200,12c) 200,10d) 300,15
A
a) 300,10
46
Q
- When the team encounters a body on a mission, who outside of the control centre must be notified?a) general managerb) regulatory agenciesc) media d) head office
A
b) regulatory agencies
47
Q
- The accuracy of colorimetric tubes is typically (+ or-)a) 75%b) 25%c) 50%d) 30%
A
b) 25%
48
Q
With the large size of some mines, it could take a long time for products of combustion to flow throughout the ventilation circuit. For example: a gas might need to travel from a downcast shaft to the up cast shaft in a potash mine. a) 10 to 30 secondsb) 30 to 50 minutesc) 1 to 2 hoursd) 2 to 4 hours
A
d) 2 to 4 hours
49
Q
- On class B fires, Foray is approximately times as effective as sodium bicarbonate based agent.a) 2b) 3c) 2 ½ d) 1 ½
A
d) 1 ½
50
Q
- The manually operated, single stage, double acting plunger pump, Drager oxygen booster pump model UH 2-T, has a maximum charging pressure of p.s.i.a) 2732b) 2946c) 3234d) 3593
A
c) 3234
51
Q
- A secondary mechanism of extinguishment is the fact that water is converted to steam and undergoes a fold increase in volume.a) 1000b) 1400c) 1700 d) 2100
A
c) 1700
52
Q
- The captain says that filter self-rescuers are one time use units. The vice-captain says that these units are for escape purposes only. Who is right? a) captainb) vice-captainc) both d) neither is right
A
c) both
53
Q
- Composite wrap oxygen tanks must be hydrostatically tested every years.a) 3b) 4 c) 5d) 6
A
c) 5
54
Q
- Electronic gas detectors have limitations. Typically these detectors function at the ranges of gas concentrations.a) lowerb) middlec) higher
A
a) lower
55
Q
- The primary method for determining if a filter self rescuer is absorbing CO is by:a) tasteb) smellc) temperature d) weight
A
c) temperature
56
Q
- The stimulus that causes us to breathe is controlled by the amount of gas in the blood.a) oxygenb) carbon dioxide c) nitrogend) carbon monoxide
A
b) carbon dioxide
57
Q
- In a class B fire rating, if an expert fire fighter can extinguish a 50 square foot pan, what size pan would a non-expert be expected to extinguish?a) 20 square foot pan b) 5 square foot panc) 30 square foot pand) 10 square foot pan
A
a) 20 square foot pan
58
Q
- A casualty with a fractured neck should be transported:a) with neck,head and body immobilized on a spine boardb) with the head to one side in case vomiting occursc) only after proper splints have been appliedd) in the most comfortable position for the casualty
A
a) with neck,head and body immobilized on a spine board
59
Q
- When a mine rescue team passes through a door or ventilation stopping,it must be restored to its positiona) closedb) openc) lockedd) original
A
d) original
60
Q
- When attempting to rescue miners trapped behind a seal barricade or door, it is desirable to the area first.a) scaleb) ventilatec) explored) secure
A
b) ventilate
61
Q
- When fighting a fire, cooling is a method of reducing the temperature of the fuel below the temperature.a) ignitionb) combustionc) flamed) smouldering
A
a) ignition
62
Q
- What is the definition of FIRE?a) an oxidation of material causing it to decayb) instantaneous oxidation leading to combustion of a carbonaceous materialc) a rapid oxidation of material with the simultaneous release of heat and light energyd) instantaneous oxidation of a gas created by pyrolysis of a heated material
A
c) a rapid oxidation of material with the simultaneous release of heat and light energy
63
Q
- Mine rescue is:a) the practised response to a mine emergency that prevents normal operation of the mineb) the practised response to a mine emergency that endangers property and continued operation of the minec) the practised response to a mine emergency that endangers life, property and continued operation of the mined) the practised response to a mine emergency that improves life, property and continued operation of the mine.
A
c) the practised response to a mine emergency that endangers life, property and continued operation of the mine
64
Q
- occurs when combustion heat is not sufficiently dissipated.a) spontaneous combustionb) smouldering mode c) flaming combustiond) spontaneous ignition
A
d) spontaneous ignition
65
Q
- Which of the following signs and symptoms may indicate a flail chest?a) breathing is normal and regularb) part of the chest wall does not rise and fall with the rest of the rib cagec) the casualty desires a drink of waterd) the casualty has a large open chest wound
A
b) part of the chest wall does not rise and fall with the rest of the rib cage
66
Q
- There are no fires conducted specifically for Class firesa) ab) bc) cd) d
A
c) c
67
Q
- Which of the following statements best define shock?a) not enough control of body functionsb) a loss of consciousnessc) not enough circulation to body tissuesd) a loss of body fluids
A
c) not enough circulation to body tissues
68
Q
- Which of the following conditions should have first aid priority?a) unconsciousnessb) severe bleedingc) shockd) stopped bleeding
A
a) unconsciousness
69
Q
- What should be done with a dry chemical extinguisher shortly after use?a) rechargeb) notify your foremanc) blow down the extinguisherd) put it back on the rack
A
c) blow down the extinguisher
70
Q
- The priority in treating an unconscious casualty is to:a) check for bleedingb) transport to a medical facilityc) open the airwayd) place in the recovery position
A
c) open the airway
71
Q
- Water fog can reduce the temperature of a fire from:a) 1000oC to 150oCb) 982 oC to 93oCc) 1300 oC to 200 oCd) 900 oC to 75 oC
A
b) 982 oC to 93oC
72
Q
- What is the minimum oxygen content required in Saskatchewan mines? a) 20.94%b) 19.5%c) 19%d) 18.5%
A
b) 19.5%
73
Q
- At what percentage of oxygen would you begin to lose consciousness? a) 17%b) 16%c) 6%-10%d) 12%-16%
A
c) 6%-10%
74
Q
- The TLV-TWA of phosgene is: a) 1.0 ppmb) 0.1 ppmc) 0.01 ppmd) .0001 ppm
A
b) 0.1 ppm
75
Q
- As little as of hydrogen sulfide can be detected by sense of smella) .03 ppmb) .0003 ppmc) .003 ppmd) .00003 ppm
A
c) .003 ppm
76
Q
- At 1500 ppm-10,000 ppm of NH3 will cause: a) nasal irritation after several hoursb) upper respiratory irritation after 30 minutesc) immediate upper respiratory irritationd) coughing, chest pain, and pulmonary edema – potentially fatal
A
d) coughing, chest pain, and pulmonary edema – potentially fatal
77
Q
- Which of the following statements about H2S is NOT true? a) produced when sulfur compounds decomposeb) may be released from methane feeders in mines with methanec) described as sweetish and bleach-liked) created when acid mine water corrodes metallic sulfides
A
c) described as sweetish and bleach-like
78
Q
- What properties apply to acetylene? a) has an odor similar to rotten eggsb) explosive range of 2.5%-93% in normal airc) has an odourant added to make the gas easier to smelld) will not burn or explode
A
b) explosive range of 2.5%-93% in normal air
79
Q
- According to MSHA,how much area is required per person to maintain an upper limit of 3% CO2 after 8 hours in an enclosed space? a) 2.5 to 3 m3b) 3.5 to 4.5 m3c) 4.5 to 5.5 m3d) 5.7 to 6.2 m3
A
d) 5.7 to 6.2 m3
80
Q
- Blood is composed of red and white cells carried in almost colorless liquid called: a) hemoglobinb) plasmac) oxygend) adrenaline
A
b) plasma
81
Q
- At what percentage of oxygen will a person begin to breathe faster and deeper? a) 20%b) 18%c) 17%d) 15%
A
c) 17%
82
Q
- Oxygen is: a) explosiveb) a product of incomplete combustionc) necessary for combustiond) toxic in high levels
A
c) necessary for combustion
83
Q
- Carbon monoxide readily bonds to , which reduces the blood’s oxygen carrying ability.a) plasmab) red blood cellsc) hemoglobind) white blood cells
A
c) hemoglobin
84
Q
- High concentrations of CO may be partially responsible for the event known as: a) smotheringb) asphyxiationc) backdraftd) detonation
A
c) backdraft
85
Q
- Carbon monoxide’s explosive range is: a) 4.3%-46%b) 16%-25%c) 12.5%-46%d) 12.5%-74%
A
d) 12.5%-74%
86
Q
- Nitrogen dioxide is dangerous for even a short time when the air contains? a) .01%b) .03%c) .05%d) .07%
A
a) .01%
87
Q
- The explosive range of hydrogen is: a) 12.5%-74.2%b) 4.3%-45.5%c) 2.5%-80%d) 4%-75%
A
d) 4%-75%
88
Q
- Carbon monoxide can be produced by: a) decomposition of organic materialb) human respirationc) mine fires and explosionsd) inflow of water
A
c) mine fires and explosions
89
Q
- Breathing small amounts of nitrogen dioxide will: a) irritate your nose and throatb) paralyze your sense of smellc) render a person unconsciousd) cause tightness in the chest
A
a) irritate your nose and throat
90
Q
- At 1600 ppm of CO, death can occur in hours. a) .5b) 1c) 2d) 3
A
c) 2
91
Q
- Which is not a true statement about NH3 ? a) used as chemical feed stock for fertilizer productionb) For processing of uranium into yellow cakec) Used in air cooling units in some minesd) Used in potable water treatment
A
d) Used in potable water treatment
92
Q
NO2 is produced: a) by electrical arc and oxy-gas weldingb) after blasting operationsc) in pools of waterd) whenever a volatile chlorine compound is heated
A
b) after blasting operations
93
Q
- Which of the following gases will not burn or explode? a) methaneb) phosgenec) carbon monoxided) hydrogen sulfide
A
b) phosgene
94
Q
- An atmosphere is almost instantly fatal when the oxygen content drops to? a) 16%b) 15%c) 12%-16%d) 10%-12%e) less than 6%
A
e) less than 6%
95
Q
- This gas will paralyze the sense of smell in high concentrationsa) sulfur dioxideb) nitrogen dioxidec) oxides of nitrogend) hydrogen sulfide
A
d) hydrogen sulfide
96
Q
- NO2 is detectable by sense of smell at:a) .01 ppm-.3 ppmb) .04 ppm-5 ppmc) .02 ppm-1 ppmd) .03 ppm-.08 ppm
A
b) .04 ppm-5 ppm
97
Q
- Which of the following gas(s) may produce fatal pulmonary symptoms 3-30 hours after exposure?a) sulfur dioxideb) nitrogen dioxidec) hydrogen sulfided) ammonia
A
b) nitrogen dioxide
98
Q
- A CO concentration of .04% for 2-3 hours can:a) cause headachesb) kill you c) cause unconsciousnessd) cause nausea
A
C) cause headaches
99
Q
- Elevated levels of CO2 can be produced by: a) water inflow and cave insb) combustion and blasting operationsc) human respiration in well ventilated areasd) by incomplete combustion of carbon materials
A
b) combustion and blasting operations
100
Q
- At what concentration of CO2 will unconsciousness occur after a few minutes?a) 2%-4%b) 3%-5%c) 5%-8%d) 7%-10%
A
d) 7%-10%
