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Use Alpert's Correlation to determine the maximum temperature (in degrees Celsius) of a ceiling jet at a point 1.3 meters (horizontally) from a 1.8 MW fire which burns within a 2.2 m tall room. Assume an ambient temperature of 22 deg C. a. 25 deg C b. 78 deg C c. 326 deg C d. 384 deg C Solution | Posted 09/18/20
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A liquid storage tank rupture results in a fire containing an open 45 gallon (130 kg) tank containing animal fat. Using gross heat of combustion, estimate the time it would take to burn the remaining fuel without interruption if the tank is half filled and the fire is approximately 2.45 MW. a. 1.2 seconds b. 11 minutes c. 18 minutes d. 17.6 hours Solution | Posted 08/13/20
An atrium houses furniture in varying arrangements at the floor level, of which heat transfer is a primary concern between combustible objects. Determine the rate of convective heat transfer (in kW) between a 31 sqft section of wood-faced wall at 22 deg C with an effective heat transfer coefficient of 0.54 kW/m^2K and a burning surface at 425 deg C. a. 218 kW b. 627 kW c. 6746 kW d. 7115 kW Solution | Posted 08/07/20
Of the following substances, which would have the greatest total heat output for the same amount of mass? a. ethane b. methanol c. toulene d. acetone Solution | Posted 07/24/20
The essence of the fire process is an exothermic reaction which releases heat and other products. Oxidation which takes place with reactants in the gas phase, as opposed to the solids phase, results primarily in what kind of combustion? a. flaming b. smoldering c. detonation d. backdraft Solution | Posted 07/23/20
Use Alpert's Correlation to determine the maximum temperature (in degress Celsius) of a ceiling jet at a point 1.3 meters (horizontally) from a 1.8 MW fire which burns within a 2.2 m tall room. Assume an ambient temperature of 22 deg C. a. 25 deg C b. 78 deg C c. 326 deg C d. 384 deg C Solution | Posted 10/22/19
White Oak wood having a density of 450, moisture-content of 25% is exposed to a standard fire (ASTM E119) test for 2 hours. What is the expected char depth most nearly? a. 1 mm b. 64 mm c. 72 mm d. 224 mm Solution | Posted 08/13/19
In preparation for the PE Exam, the fire dynamics content is my weakest subject. I am looking to take some classes on fire dynamics, do you have any suggestions?
Posted anonymously for discussion. Discuss This | Submit Your Question | Subscribe The amount of energy required to raise the temperature of 1 kg of fluid by 1 deg C is: a. Conduction Coefficient b. Enthalpy c. Entropy d. Specific Heat Solution | Posted 07/23/19
Of the following substances, which would have the greatest total heat output for the same amount of mass? a. ethane b. methanol c. toulene d. vinyl acetate Solution | Posted 07/18/19
A secondary containment tank is constructed to handle overflow from fuel in a storage area. If a 540 kW/m fire occurs from the fuel in the trench, determine most nearly the flame height. a. 1.1 m b. 2.3 m c. 4.6 m d. 11 m Solution | Posted 06/28/19
Use Alpert's Correlation to determine the maximum temperature (in degrees Celsius) of a ceiling jet at a point 1.3 meters (horizontally) from a 1.8 MW fire which burns within a 2.2 m tall room. Assume an ambient temperature of 22 deg C. a. 25 deg C b. 78 deg C c. 326 deg C d. 384 deg C Solution | Posted 06/27/19
The temperature where the vapor pressure of a liquid is the same as the surrounding atmospheric pressure is which of the following? a. boiling point b. fire point c. flash point d. lower flammability limit Solution | Posted 07/05/18
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