소방설비기사 실기 수리계산

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About this app

Do not rely on apps to memorize the mathematical calculations and past exam questions for the Fire Protection Engineer (Mechanical Field) practical exam. This app allows you to directly input formulas into a calculator and visually learn the process of how the answer is derived.

It is not as simple as just entering values. For every calculation, it displays the formula → value substitution → answer exactly as it appears in the exam, and even includes the justification for which fire safety standards (NFPC/NFTC) clause the formula originated from.

■ 23 Types of Hydraulic Calculations Appearing in the Practical Exam

• Indoor/Outdoor Nozzle Discharge Rate Q = 0.653D²√(10P)

• Pump Total Head H = h₁+h₂+h₃+Converted Head by Water Pressure

• Pump (Motor) Power P = 0.163QH/η × K

• Water Source Capacity Q = N × q × t

• Hasen-Williams Piping Friction Loss

• Sprinkler K-Factor Discharge Rate Q = K√(10P)

• Fire Water Tank Storage Capacity, Pressure Tank Required Pressure

• Foam Fire Extinguishing Agent (Concentrate, Aqueous Solution, Water Source), CO₂ Surface Fire Agent Quantity

• Living Room Smoke Control Discharge Emission, Continuity Equation Flow Rate, Pipe Diameter Selection

• Connecting Water Supply Discharge Rate, Battery Capacity

• CO₂ Deep Fire, Halon 1301, Powder Agent Quantity (Total Discharge)

• CO₂ Local Discharge Agent Quantity (Area Formula) 13 kg/m² · Volumetric formula Q = 8 − 6 (a/A))

• Number of sprinkler heads (square) · Spacing of rectangular heads

• 1/3 of the effective water volume of the rooftop tank, pump performance test judgment value

■ Solutions applicable in the exam room

• Not just showing the answer, but providing the formula → substitution → 3-line solution exactly as is

• Fire safety standards (NFPC/NFTC) provisions indicating the basis for each calculation

• Conditions such as water pressure, concentration, and reference area can be selected directly via dropdown

■ Ideal for studying

• 100% offline — anywhere, such as subways or study rooms

• Screen off prevention (the screen does not turn off while solving problems)

• No account required. Calculation data does not leave the phone. No ads.

■ One-time payment

The free version provides the solution process for 5 types: water volume, total head, pump power, water source, and Hazen-Williams. The Pro version unlocks all 23 types for life with a single payment.

No subscription. No ads. No features will be removed later.

This app is for educational reference only. Actual design and construction must comply with the latest fire safety standards (NFPC/NFTC) and undergo supervision verification.

What’s new

Stability and reliability improvements.