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A manufacturing facility's campus water supply is fed from a 125-foot tall open atmosphere water tank. A site fire pump is located 5 feet above grade and is flowing at its rated capacity of 35 psi at 1000 gpm with 18 psi loss in the total pipe network, what will the pressure be at the pump discharge if the discharge pipe is 4 inches in diameter?  Solution | Posted 10/08/20
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A chemical processing plant has an explosive release in one of the mixing areas, causing a fireball that at 16 meters and a radial distance of 24 meters causes a radiant heat exposure of 6.2 (kW/sq.m.)^4/3-min. What is the expected burn effect for workers with exposed skin? a. Minor irritation b. 1st Degree burn / severe skin pain c. 2nd Degree burn d. 3rd degree (full thickness) burn Solution | Posted 07/27/20
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
A stair is being designed as pressurized as part of a smoke control plan. A single door gap below a 4 foot wide door has a 0.35 inch tall door gap where the pressure differential between the two sides of the door are 0.1 in. w.g.. Assuming a flow coefficient of 0.7 and normal atmospheric conditions, what is the volumetric flow rate of air through the gap? a. 33 cfm b. 73 cfm c. 104 cfm d. 148 cfm Solution | Posted 07/21/20
At what frequency shall a preaction sprinkler system valve be trip tested with the control valve fully open? a. annually b. every 3 years c. every 5 years d. every 10 years Solution | Posted 07/20/20
A new-construction church is to contain a main sanctuary and stage, complete commercial kitchen with lounge seating area, and a connected enclosed parking garage. What is the most hazardous fire sprinkler occupancy for this facility? a. Light Hazard b. Ordinary Hazard Group 1 c. Ordinary Hazard Group 2 d. Extra Hazard Group 1 Solution | Posted 07/17/20
Determine the flow (in gpm) through a residential sidewall K4.2 sprinkler at 10.1 psi. a. 13 gpm b. 18 gpm c. 21 gpm d. 42 gpm Solution | Posted 07/16/20
Which of the following arrangements is not permitted for a new prison, under NFPA standards? a. Sprinkler Protected, Type II (222) Construction, High-Rise Building b. Sprinkler Protected, Type II (000) Construction, 3-Story Building c. Sprinkler Protected, Type IV (2HH) Construction, 2-Story Building d. Sprinkler Protected, Type V (000) Construction, 1-Story Building Solution | Posted 07/15/20
A portion of a home-improvement store has K11.2 ceiling-only sprinkler protection above double row racks. The owner is looking to store bagged charcoal (without any impregnated ignition fluid or plastic wrap) atop reinforced plastic pallets in this area. What would the commodity classification be for this arrangement if no plastics are intermixed? a. Class II b. Class III c. Class IV d. Group A Plastic Solution | Posted 07/14/20
Extinguishment of fire by cooling the solid or liquid combustible is effective primarily because: a. the cooling prevents production of combustible vapors b. the cooling interrupts the chain reaction c. the cooling surface will condense moisture from the air, pre-wetting surfaces d. all of the above Solution | Posted 07/13/20
Who is responsible for coordinating the inspection, testing, and maintenance activities of water-based fire suppression systems? a. monitoring company b. owner c. insurer d. inspecting contractor Solution | Posted 07/10/20
A hospital's patient tower has an an exit access corridor with 1/2 hour partition fire resistance rating on the first level. If the interior architect would like to provide side transoms (narrow windows) along the side of the doors that lead to the exit access corridor, what fire resistance rating must the transoms have? a. 1/3 hour b. 1/2 hour c. 3/4 hour d. 1-hour Solution | Posted 07/09/20
A 4-inch schedule 40 main is routed parallel in-between two beams and requires a trapeze hanger. The main is 2 ft. from one beam and 8.5 ft. from the other for a total span of 10.5 ft. What is the smallest schedule 10 pipe diameter capable of supporting this main as a trapeze hanger? a. 2-inch b. 2-1/2 inch c. 3 inch d. 3-1/2 inch Solution | Posted 07/08/20
Today starts the free daily PE sample questions along with the daily forum emails. Taking the PE Exam this fall? Great, be sure to check out the other resources around the site (PE Prep Guide, Prep Series, & the new PE Roadmap). Not taking the PE Exam? Congratulations, you have the summer all to yourself. Kick your feet up, sit back, and enjoy a steady dose of questions to test your knowledge for fun. If the relationship below describes the growth phases of fire, what point does the arrow indicate? a. ignition b. ceiling jet creation c. flashover d. growth  Solution | Posted 07/07/20
Just wanted to wish each of you taking the PE Exam tomorrow all the best of luck.
I've enjoyed putting together these daily questions, the prep guide, and the online prep series and I very much hope that they've been helpful for you! If you ever have any comments or feedback, feel free to shoot them my way at joe@meyerfire.com. Thanks for subscribing, commenting, and being a part of the community here. All the best in knocking this exam out tomorrow! Determine the flow (in gpm) through an extended coverage pendent K16.8 sprinkler at 85 psi. a. 52 gpm b. 155 gpm c. 348 gpm d. 1428 gpm Solution | Posted 10/23/19
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
Determine the visibility (in meters) for a light reflecting exit sign with smoke that is produced by pyrolysis of plastic. Assume the smoke has a mass concentration of 0.09 grams per cubic meter. a. 4.4 m b. 7.6 m c. 11.7 m d. 20.2 m Solution | Posted 10/21/19
The activation time (in seconds) of a standard response (RTI of 85 m^1/2s^1/2), Ordinary Temperature (65 deg C) heat detector within a room that has an initial temperature of 22 deg C and exposed to a ceiling plume at 78 deg C traveling at 2.3 m/s is most nearly? a. 10 s b. 36 s c. 54 s d. 82 s Solution | Posted 10/18/19
Which of the following occupancies have no difference in maximum permitted travel distance for sprinklered versus unsprinklered buildings? a. Existing Day Care b. Residential Lodging c. Existing Mercantile d. New Business Solution | Posted 10/17/19
Which of the following types of pipe would require the most hangers for the same length of 1-1/2" pipe? a. CPVC b. Copper Tube c. Steel other than Threaded Lightwall d. Threaded Lightwall Steel Solution | Posted 10/16/19
An oil field site has a potential for detonation of an equivalent of 180 lb of TNT at its main plant. Determine most nearly the minimum distance where an adjacent oil storage tank would rupture at this energy. a. 50 ft. b. 80 ft. c. 100 ft. d. 150 ft. Solution | Posted 10/14/19
Which of the following would be considered a typical fire load for a bedroom? a. 0.4 - 0.8 lb/sqft b. 3.2 - 5.5 lb/sqft c. 11 - 14 lb/sqft d. 43 - 48 lb/sqft Solution | Posted 10/11/19
A fire pump's speed is altered from 1760 to 1800 rpm. What is the new head if the original was 120 ft? a. 115 ft. b. 123 ft. c. 126 ft. d. 128 ft. Solution | Posted 10/09/19
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