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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! 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 10/24/19
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
If Element A is a 45-minute interior door, B is a corridor, C is a 2-hour rated stair, and D is a non-rated exterior door, which element identified would be considered an exit?  a. 45-minute Interior Door A b. Corridor B c. 2-hour Rated Stair d. Non-Rated Exterior Door Solution | Posted 10/15/19
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
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 10/10/19
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
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?  a. 48 psi b. 56 psi c. 64 psi d. 71 psi Solution | Posted 10/08/19
A high-rise building is to use a pressurized tank (half air-half water) to supply automatic sprinkler systems. If hydraulic calculations determine that 55 psi is required to supply the sprinkler system, what tank pressure is required? a. 55 psi b. 95 psi c. 125 psi d. 140 psi Solution | Posted 10/07/19
What is the greatest allowed spacing among all pipe sizes between hangers for CPVC pipe in fire sprinkler systems? a. 6'-0" b. 9'-0" c. 10'-0" d. 12'-0" Solution | Posted 10/04/19
Chlorine and Methyl Bromide are examples of what International Hazard Class and Division? a. Class 1 Division 1.4 b. Class 2 Division 2.3 c. Class 4 Division 4.2 d. Class 6 Division 6.1 Solution | Posted 10/03/19
A fire department connection may be installed by any of the following arrangements except: a. Between the supply control valve and the system control valves for multiple sprinkler systems b. Attached to underground system piping, between the supply control valve (at the main tap) and the system control valves (inside the building) c. Attached to main pipe on a system (on the system side of the system control valve) for a single wet system d. Attached to the main service between the utility tap and the entry into a fire pump room Solution | Posted 10/02/19  A project site is connected to a water tank through an equivalent 650 feet of 6-inch schedule 10 pipe (c-factor of 140). If the water tank is 165 feet above the project site, the fire flow available at the project site is most nearly: a. 1,300 gpm b. 2,100 gpm c. 2,400 gpm d. 8,700 gpm Solution | Posted 10/01/19
Which of the following agents are not used for metal fires containing magnesium? a. Boron Trifluoride b. Boron Trichloride c. Argon d. Nitrogen Solution | Posted 09/30/19
An equivalency is being developed for a building with unprotected steel W24x76 columns. Determine the fire endurance time (in minutes) for one of these columns W24x76 columns have an approximate flange and web thickness of 0.68 inches, and a flange width of 8.99 inches. a. 4.3 minutes b. 7.8 minutes c. 9.7 minutes d. 55.3 minutes Solution | Posted 09/27/19
A cotton production facility has areas of the production where fibers are considered easily ignitable. Which of the following trucks is not permitted in these areas? a. Diesel Type DY b. Electric Type EE c. Diesel Type DS d. Electric Type EX Solution | Posted 09/26/19
Which of the following is typically not considered obstructed construction for fire sprinkler design? a. concrete tees with solid members 5 inch wide and 2 ft tall b. heavy timber construction with 4 inch solid wood beams c. beam and girder construction with 6 inch steel beams 6 ft apart d. panel construction with panels under 300 sqft Solution | Posted 09/25/19
A 2 inch main drain (considered smooth opening) is opened to full drain capacity for a system with a pressure of 95 PSI. Approximately how much water (in gpm) will the drain flow assuming no friction loss? a. 420 gpm b. 925 gpm c. 1165 gpm d. 1460 gpm Solution | Posted 09/24/19
A stair is 59 inches wide, with a handrail on one side with a centerline of 1.5 inches from the edge of the stair. The other side of the stair is a wall. For the purposes of calculating a specific flow, what is the effective width of the stair? a. 47 in. b. 48 in. c. 53 in. d. 59 in. Solution | Posted 09/23/19
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