NICET / CFPS Study Guide

A diesel-driven, split-case centrifugal fire pump has a rated capacity of 1500 GPM at a rated net pressure of 120 psi and a rated speed of 2100 RPM. During the annual flow test, the technician records the following raw field data at the 150% peak flow point (2250 GPM):

• Tested Pump Speed ($N_1$): 1980 RPM
• Measured Suction Pressure: 22 psi
• Measured Discharge Pressure: 92 psi

Tasks: Calculate the tested net pressure ($H_1$), the speed-corrected flow rate ($Q_2$), and the speed-corrected net pressure ($H_2$). If the manufacturer's nameplate net pressure at 150% flow is 78 psi, determine if this specific test point complies with the 95% performance threshold required by NFPA 25.

An inspector is conducting an annual site audit of a high-piled combustible storage warehouse protected by a wet-pipe sprinkler system. During the walk-through, the inspector notes the following conditions:

• Records show that quarterly waterflow alarm tests have been completed, but the records of these tests are only kept on file for 6 months.
• Several storage pallets are stacked such that the top of the storage is within 22 in. of the ceiling sprinklers.
• The post indicating valve (PIV) controlling the main yard supply was visually inspected last month, but records indicate it was last physically shut and re-opened 24 months ago.
• The annual main drain test was last conducted 14 months ago.

Task: Identify the specific NFPA 25 compliance deficiencies and describe the corrective actions required.

During a routine operational test of a dry-pipe sprinkler system, the technician notes that the water delivery time from the moment the dry-pipe valve trips to the discharge at the inspector's test connection has increased from 38 seconds (recorded during the original acceptance test) to 55 seconds. Additionally, the system's nitrogen generator has been turned off for maintenance, and the system has been pressurized with standard shop air for the past 4 months. The system's hydraulic calculations were originally approved using a Hazen-Williams friction coefficient of $C = 120$.

Tasks: Identify the mandatory actions required under NFPA 25 and discuss the hydraulic implications of these conditions.

An industrial process inside a closed concrete milling room generates combustible grain dust. During a safety audit, the inspector notes that grain dust is allowed to accumulate on elevated surfaces. The room is a fully enclosed concrete structure. Additionally, the process utilizes a Class IC flammable solvent with a flash point of 24°C (75°F) and a boiling point of 39°C (102°F).

Tasks: Using the Dust Explosion Pentagon, explain the structural and chemical conditions that could lead to a dust explosion in this room. Discuss how the Class IC solvent could serve as an ignition source, and explain natural gas hazards in the event of a ventilation system failure.

A design professional is reviewing the plans for a new, multi-story unsprinklered Educational building. The floor plate for the second story measures 60 ft wide by 180 ft long. The calculated total occupant load for this story is 240 people, and stairs serve as the primary means of egress.

• Calculate the minimum number of exits required for this story.
• Calculate the building's overall diagonal dimension and determine the minimum physical separation distance required between the exits.
• Determine the stair width, riser height, tread depth, and handrail height required to satisfy NFPA 101 egress stair criteria.
• Identify whether panic hardware is required on the exit doors.
• State the maximum travel distance, maximum dead-end corridor length, and maximum common path of travel permitted for this unsprinklered educational occupancy.

An architect is designing a high-rise office building and proposes using a decorative wood-veneer wall panel. The material is submitted for ASTM E84 testing, and the laboratory report lists the following results:

• Flame Spread Index (FSI): 20
• Smoke Developed Index (SDI): 480
• The building construction is classified as Type I (3-3-2).

• Explain what each digit in the Type I (3-3-2) classification represents structurally.
• Determine the ASTM E84 classification of the proposed wood-veneer panel.
• Evaluate whether this material is compliant for installation as an interior finish in a public exit stairway.