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Question
93. Explain why it is permissible to pick up a load with wire rope block and tackle when the load is even heavier than the breaking strength of the wire rope.Answer
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10. Name at least four physical conditions that should disqualify an employee from serving in a fire brigade.
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68. Explain the principle of "closed circuit" operation of SCBA units.
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65. Describe the situation that is known to frequently result in a series of multiple fatalities, i.e., victim, then rescuer, then rescuer of the rescuer, etc. What standard (general name only) does OSHA cite in these situations(a) prior to 1993 and (b) after 1993?
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19. The U.S. annual fire death rate is approximately:
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a. pressure demand
b. sulfur dioxide reactor unit
c. chemical oxygen generating unit
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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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FLASH POINT: -40OF
BOILING POINT: 36.1OC
LEL: 1.5%
UEL: 7.8%
VAPOR DENSITY: 2.48
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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
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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