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Question
10. Name at least four physical conditions that should disqualify an employee from serving in a fire brigade.Answer
This answer is hidden. It contains 73 characters.
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a. They might not hear the fire alarm.
b. Excessive heat might worsen their condition.
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68. Explain the principle of "closed circuit" operation of SCBA units.
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19. The U.S. annual fire death rate is approximately:
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52. Which of the following types of supplied air respirators might explode if immersed in water?
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51. Which of the following modes of air line respirator is most dependent upon fit for its effectiveness?
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47. The air line respirator derives its name froma. its use by the airlines in emergency losses of cabin pressureb. its ability to purify air in the air linec. its ability to supply atmosphere through an air lined. the fact that not only inhaled air but also exhaled air is transported through an air line
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24. Because they are likely to leak, dust masks are not as popular as other respirators.a. trueb. false
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21. Dust masks are not approved for particulates.a. trueb. false
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18. A gas mask is more effective than a cartridge respirator in an oxygen-deficient atmosphere.a. trueb. false
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6. What alternative is permitted to qualify an air-purifying device to be approved for a toxic substance that has no warning properties?
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4. Explain the chemical process (name ingredients) that generates oxygen for closed circuit SCBA equipment.
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91. Explain how liquid surface area affects the requirement for automatic extinguishment facilities for dip tanks.
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FLASH POINT: -40OF
BOILING POINT: 36.1OC
LEL: 1.5%
UEL: 7.8%
VAPOR DENSITY: 2.48
Q:
79. Calculate the amount of general exhaust ventilation (in room changes per hour) needed to control (prevent explosion) a general release of gasoline vapors of 4 cubic feet per minute in a room that measures 12'x 15'x 10'. State any necessary assumptions. Gasoline has the following characteristics:
FLASH POINT: -40OF
BOILING POINT: 36.1OC
LEL: 1.5%
UEL: 7.8%
VAPOR DENSITY: 2.48
Q:
75 If the temperature of a liquid is too low for a fire to be sustained on the top of the liquid, then you know thata. the temperature is below the flash point but above the firepointb. the temperature is below the firepoint but above the flash pointc. the temperature is below both the flash point and the firepointd. the temperature is below the firepointe. b and d abovef. none of the above
Q:
73 The temperature at which a fire on the top of a flammable liquid is sustained is called.
a. firepoint
b. flash point
c. LEL
d. UEL