​A trench is built to handle overflow of heavy oil from a common garage workspace area to a containment tank. Determine the flame height (in meters) for an open linear fire (130 kW/m) within this trench.
a. 0.44 m
b. 0.87 m
c. 2.2 m
d. 25.7 m

Solution | Posted 07/09/19

Solution | Posted 06/25/19

Solution | Posted 06/12/19

Solution | Posted 06/07/19

Have you had AHJ’s request FPE seals on hood fire suppression systems often? It’s in the letter of UFC 3-600-01 (this is a US military project) but has not come up before for us. 

Do you have an opinion on what needs to happen if the system (or the majority of it) is factory installed in the hood? Can it be treated as part of the UL listed assembly?

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There's a jurisdiction that is considering requiring "Fire Fighter Air Replenishment System" or as I understand it a standpipe-for-air system. Has anyone designed these systems?

The International Fire Code (Appendix L) provides requirements for the system - my only concern is the size and storage of pressurized oxygen tanks either in or near the stairwells and the potentially increased hazard they could be in a fire.

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There's many code contingencies that depend on a fully-sprinklered building. If a room within a fully-sprinklered building is protected with a clean agent system (per NFPA 2001) and sprinklers are omitted from that room, does the building still meet the criteria to be considered fully protected and qualify for the numerous code contingencies?

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A foam system is being used to protect for spilled methanol within a dike of a tank 1,120 square meters (12,055 sqft). What foam proportion would be recommended?

Is there an advantage between a balance pressure pump proportioning system or an in-line balance pressure pump proportioning system?

The system is being designed under NFPA 11, 16, and 30.

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A control area exists within a fully-sprinklered paint manufacturing facility. Current storage of Class IB and IC liquids total 100 gallons. If these and new Class IB and IC liquids are moved into approved liquid storage cabinets, how much more volume is permitted to be stored above the current 100 gallons?
a. 20 gallons
b. 140 gallons
c. 380 gallons
d. 480 gallons

Solution | Posted 09/28/18

Hydrogen gas will combust at which of the following percent volumetric concentrations in air?
i. 2.5%
ii. 35%
iii. 65%
iv. 85%
​
a. ii and iii
b. iii and iv
c. ii, iii, and iv
d. i, ii, iii, and iv

Solution | Posted 09/17/18

What is the foam friction loss (in head per 100 ft) and flow velocity for a 4:1 expansion foam flowing 130 gpm in a 2-1/2" schedule 40 pipe (with a c-factor of 100) most nearly?
a. 4.5 ft head/100 ft pipe and 4.75 ft/s
b. 8 ft head/100 ft pipe and 4.75 ft/s
c. 10 ft head/100 ft pipe and 4.5 ft/s
d. 30 ft head/100 ft pipe and 5.5 ft/s"

Solution | Posted 09/13/18

Which of the following agents has the highest required extinguishing concentration for a UL Class A design fire?
a. HFC-125
b. HFC-227ea
c. FK-5-1-12
d. All agents require the same density

Solution | Posted 08/20/18

Which of the following extinguishers would not be suitable for a fire containing oil-based paints, solvents, alcohols, and lacquers?
a. AFFF
b. carbon dioxide
c. potassium chloride
d. wet chemical

Solution | Posted 07/19/18

What is the difference between malleable and cast iron? Is there a preference between the two for use in sprinkler or clean agent system fittings?

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We have about 5 kitchen hoods in a restaurant, all connected to Ansul systems, then tying into a Halton pollution control unit. Halton is stating we need a fire protection system inside the ductwork within 15’ from it's unit. Who typically designs this system and would it be another Ansul system? The fire protection engineer of record only does water...

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