**Show all calculations and use an EXCEL spreadsheet**

**1. -** You are hired by an industry that owns a building with a floor area of 6 m by 10 m and a ceiling height of 4 m. The walls, floor, and ceiling are concrete 15 cm thick. Gasoline is spilled on the floor and ignites due to a worker casually lighting a cigarette. The building has a door which is 1.2 m wide by 2.5 m high.

(a) What is the energy release rate at flashover (MW)?

(b) What is the maximum area of spill (m^{2}) if flashover is to be prevented?

Note: Perform your calculations 10 minutes after ignition and use combustion efficiency of 0.7.

**2 .- **A room has dimensions of 20 m by 20 m by 3.05 m high. A fire develops in the room with a constant energy release rate of 900 kW. Compute the time (sec) that it will take the smoke layer to be 1.5 m from the floor for two conditions: (a) when leakage areas are located at floor level; and (b) when the leakage is at roof level.

**3. - **A closed room is 5 m high and contains a fire with a plume mass flow rate of 5 kg/s at a height of 2.5 m and an upper layer temperature of 400^{o}C. There is an opening at floor level 1 m wide and 2.5 m high. Your assignment is to find the required ceiling ventilation area if the smoke is not to come closer than 2.5 m from the floor.

Subject | Science |

Due By (Pacific Time) | 07/23/2014 07:00 pm |

Tutor | Rating |
---|---|

pallavi Chat Now! |
out of 1971 reviews More.. |

amosmm Chat Now! |
out of 766 reviews More.. |

PhyzKyd Chat Now! |
out of 1164 reviews More.. |

rajdeep77 Chat Now! |
out of 721 reviews More.. |

sctys Chat Now! |
out of 1600 reviews More.. |

sharadgreen Chat Now! |
out of 770 reviews More.. |

topnotcher Chat Now! |
out of 766 reviews More.. |

XXXIAO Chat Now! |
out of 680 reviews More.. |