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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 09/19/19
For a performance-based design, a fire protection consultant makes an assumption that the production rate of carbon monoxide for a modeled fire package is equal to the highest production rate of each of the component fuels. This assumption would be considered:
a. explicit safety factor
b. implied safety factor
c. total safety factor
d. no safety factor
Solution | Posted 09/17/19
The worst expected symptoms for humans when concentration of carbon monoxide reaches 1600 parts per million is which of the following:
a. no adverse effects for up to 8 hours of exposure
b. dizziness after 45 minutes of exposure
c. nausea, headache, and dizziness after 20 minutes of exposure
d. unconsciousness and danger of death after 10-15 minutes of exposure
Solution | Posted 09/16/19
A theater has aisles serving its main seating area. One of the aisles has a stair 49 inches wide, with a wall and handrail on one side and fixed seating on the other. If the handrail has a center-line of 4 inches from the wall, what is the effective width of the stair?
a. 35.5 in.
b. 41.5 in.
c. 43 in.
d. 45 in.
Solution | Posted 09/11/19
A new building is to have a wet pipe fire sprinkler system connected to an existing city main. Which of the following tests is not required by NFPA 13 for the fire sprinkler system or underground service?
a. flushing test
b. hydrostatic test
c. main drain test
d. water delivery test
Solution | Posted 09/10/19
A new-construction high-rise is being installed. Where a vertical trash chute has openings into a room on each floor, which of the following is not required?
a. The room must not be greater than 400 square feet (37 square meters)
b. The chute can be no greater than 24 square feet (2.2 square meters)
c. The room may only be used for storage
d. The room must have automatic sprinklers
Solution | Posted 09/05/19
A four-story low-rise senior retirement living facility is being designed without the need for health support services. Which of the following areas, which each serve the entire floor level, does not require a minimum of one-hour fire resistance rating?
a. A 300 sqft laundry room
b. A 50 sqft trash room
c. A 100 sqft storage room
d. All of the above
Solution | Posted 09/03/19
Consider the following fire hydrant flow tests conducted at the same elevation:
Test A: 75 psi Static, 60 psi Residual at 1,200 gpm
Test B: 65 psi Static, 60 psi Residual at 1,800 gpm
Test C: 70 psi Static, 45 psi Residual at 1,200 gpm
Which of the following is true?
a. Test A would provide better pressure than Test B for a 1,500 sqft Light Hazard sprinkler system.
b. Test A would provide better pressure than Test B for a 3,000 sqft ESFR sprinkler system.
c. Test B would always provide better pressure than Test C for any type fire sprinkler system.
d. Both a and c.
Solution | Posted 08/28/19
In which of the following scenarios is neither explosion protection nor suppression system required?
a. Flammable paint warehouse mixing rooms where open transfer of paint occurs
b. Dust ventilator equipment where the dust density can be above its lower flammability limit
c. Mechanical room where service equipment is subject to explosion
d. All of the above require either explosion protection or suppression systems
Solution | Posted 08/27/19
An warehouse facility is seeking to store cartoned Level 3 aerosol products on pallets. If the storage height is 10 feet in height with a 23 foot ceiling, what minimum k-factor must be provided for the ceiling-level sprinklers protecting this area?
Solution | Posted 08/23/19
An open, unobstructed space connects an entry level lobby with a balcony on the level above in a fully sprinklered residential building while separated from the remainder of the building with a smoke barrier. If the space only has low hazard contents and meets egress requirements, what type of space does it qualify as?
b. Communicating Space
c. Convenience Opening
d. Two-Story Opening with Partial Enclosure
Solution | Posted 08/21/19
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 08/16/19
Determine the required thrust block volume (in cubic feet) for a 45-degree elbow serving a wet 6-inch schedule 10 pipe in sandy silt with a 50% safety factor added. The water within the pipe has a maximum pressure of 140 psi and the block material has a density of 150 pounds per cubic foot.
a. 28 cubic feet
b. 31 cubic feet
c. 44 cubic feet
d. 63 cubic feet
Solution | Posted 08/14/19
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