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

Halocarbon clean agents are effective fire extinguishing products due to what principal(s):
i. oxygen dilution
ii. heat extraction
iii. chemical combustion interruption
​
a. ii only
b. i and ii only
c. ii and iii only
d. i, ii, and iii

Solution | Posted 08/27/18

A 52 ft long by 22 ft wide by 10 ft tall space contains high value historic newspapers in pervious metal storage. If the space is to be kept at 72 deg F and has fixed structures of 194 cubic feet, what minimum quantity of FM-200 agent would be required to protect the space in a full flood application if the design concentration is 6.7%?
a. 340 lb
b. 364 lb
c. 437 lb
d. Other

Solution | Posted 08/24/18

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

Inergen (IG-541) is being used for protection of several rooms which contain highly valuable historic documents. If the fire type is considered Class A and the design concentration of Inergen is provided, determine the clean agent-air mixture density.
a. 1.15 kg/cu. m
b. 1.25 kg/cu. m
c. 1.28 kg/cu. m
d. 1.44 kg/cu. m

Solution | Posted 06/14/18

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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