Engineering, 21.01.2021 22:10 Lewis5442
Fire Extinguishers Test (true or false)
53. Never play with the extinguishers so they will remain charged for
emergencies.
54. Before you use an extinguisher check what kind it is.
55. Class A - wood, paper, trash, etc...
56. Class B - flammable liquids such as paints and finishes.
57. Class C - electrical fires.
58. ABC extinguishers should be safe for all type fires.
59. Water on flammable liquids will spread the fire since it floats on the water.
60. Water on electrical is a shocking choice.
Portable Drill Test
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At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.
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An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature
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Fire Extinguishers Test (true or false)
53. Never play with the extinguishers so they will remain c...
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