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Quizzes > Science

FDNY s12 practice test: Citywide Standpipe System

Quick, free s12 practice exam with instant results and explanations.

Editorial: Review CompletedCreated By: Leslie Brown LindseyUpdated Aug 27, 2025
Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art illustration promoting a free FDNY S12 practice test on a teal background

This quiz helps you check your knowledge for the FDNY S-12 Citywide Standpipe System exam with realistic questions on valves, inspections, signage, and safety. See where you need review with instant scoring and brief explanations. Studying beyond S-12? Try the f-02 practice test, the flsd practice test, and the FDNY A-35 practice test.

Which NFPA standard primarily governs the installation of standpipe systems referenced by the FDNY S12 exam?
NFPA 25
NFPA 72
NFPA 14
NFPA 13R
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A Class I standpipe system is intended to provide hose connections for fire department use. Select the correct outlet size typically provided.
1-1/2 inch hose valves with adjustable fog nozzles
3 inch hose valves for industrial use
2-1/2 inch hose valves
1 inch garden-type hose reels
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In New York City, standpipe fire department connections on the exterior are commonly referred to as what?
Monitor inlets
Post indicator valves
Test headers
Siamese connections
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Automatic wet standpipe systems are characterized by which condition under normal operation?
Piping is filled with water and pressure is maintained
Piping is filled with air at supervisory pressure only
Piping is empty and manually supplied via FD connection only
Piping is dry and fills only when a fire pump starts
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The main purpose of pressure-reducing valves (PRVs) on standpipe hose outlets is to:
Limit outlet pressure to safe, usable levels
Prevent water hammer at the fire pump
Shut off flow automatically when hose is disconnected
Increase flow by reducing friction loss
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Standpipe valves serving stairwells should be located so that firefighters can access them while:
Protected within the stair enclosure
At street level only
Standing in the corridor for quick exit
On the roof for best gravity head
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NYC Fire Code generally requires standpipe systems in buildings exceeding which height threshold for high-rise classification?
75 feet above the lowest FD vehicle access
50 feet above grade
45 feet to top occupied floor
60 feet to roof deck
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Dry standpipe systems intended for manual supply by the fire department are described as:
Automatic-wet
Semiautomatic-wet
Preaction-dry
Manual-dry
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Which component prevents foreign matter from entering the siamese connection?
Orifice plate at the test header
Air release valve on the riser
Clappered caps or plugs with chains
Check valve at the fire pump suction
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When a PRV is field-set for a specific floor, its set pressure is based primarily on:
Expected inlet pressure at that outlet during fire-flow
Highest floor nozzle reaction limits
Static tank head only with pump off
Manufacturer default tag value
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Hydrostatic testing of standpipe risers during acceptance typically uses a test pressure of at least:
90 psi regardless of building height
50 psi for 30 minutes
25 psi if a pump is installed
200 psi or as required by code/specification
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For high-rise standpipes, the maximum outlet pressure at the 2-1/2 inch hose valve is commonly limited to approximately:
175 psi unless otherwise permitted by code
35 psi for safety
75 psi to protect hose
250 psi to maximize reach
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Semiautomatic standpipe systems require which action to deliver water to outlets?
Manual activation of a remote start device to initiate the pump or release valve
No action; they are always full and pressurized
FD must supply water through the test header
Air compressor must be shut down
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A zone control arrangement in a tall building standpipe system is primarily used to:
Allow sprinklers to drain separately
Provide foam proportioning to certain floors
Limit static pressures by dividing the riser into pressure zones
Connect multiple FDCs to a single riser
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Which scenario requires a standpipe impairment plan to be enacted immediately?
A faded FDC sign needs repainting
A hose nozzle is missing dust cap only
A riser control valve must be closed for repairs
A cabinet glass pane is cracked
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When two standpipe risers serve the same stair, cross-connection at certain levels is intended to:
Increase redundancy and equalize supply under impairment
Reduce need for PRVs
Allow draining through roof manifold
Provide foam through one riser
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A standpipe with automatic dry configuration uses which primary means to deliver water?
FD truck must always supply water
Manual filling from roof tank only
Automatic opening dry pipe or quick-fill valve upon demand
Continuous jockey pump circulation
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The required minimum residual outlet pressure at the topmost Class I standpipe outlet under flow is typically:
15 psi
40 psi
100 psi unless modified by local code/PRVs
250 psi
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When performing a standpipe flow test using pitot gauges, converting pitot pressure to flow assumes:
Static pressure equals dynamic pressure
Use of standard nozzle coefficients for the outlet device
Friction loss is zero
Water temperature dictates flow directly
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In tall buildings, series fire pumps (low-zone and high-zone) are used to:
Allow removal of gravity tanks
Manage pressures across multiple zones without exceeding component ratings
Eliminate need for PRVs entirely
Provide redundancy only, not pressure control
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Study Outcomes

  1. Understand Citywide Standpipe System Fundamentals -

    Summarize the purpose, types, and critical components of FDNY standpipe installations as covered in the s12 practice test.

  2. Interpret Standpipe System Diagrams -

    Analyze schematics and technical drawings from sample questions in the s12 practice exam to accurately identify piping layouts and riser locations.

  3. Apply FDNY and NFPA Code Requirements -

    Use applicable code standards to determine compliance for system design and installation scenarios presented in the s12 s13 fdny practice test.

  4. Calculate Water Flow and Pressure -

    Perform essential hydraulic calculations to assess water supply adequacy and pressure profiles in Citywide Standpipe setups.

  5. Evaluate Inspection and Testing Procedures -

    Demonstrate correct inspection, testing, and maintenance protocols to ensure standpipe readiness, drawing on sample FDNY S12 scenarios.

  6. Leverage Instant Feedback for Targeted Review -

    Interpret quiz results to pinpoint weak areas and integrate fdny s13 study material for focused exam preparation.

Cheat Sheet

  1. Standpipe Classifications and Hazard Groups -

    NFPA 14 and FDNY Fire Code 9.25 define Class I (2.5″ hose for firefighters), Class II (1.5″ hose for occupants), and Class III (combination) systems. The s12 practice exam often tests your ability to match hose sizes to hazard occupancies - use the mnemonic "1-2-3: Hose for pros, occupants, both" to memorize quickly. Classes are assigned based on occupancy risk, so cross-check with FDNY approved building classifications.

  2. Minimum Pressure and Flow Requirements -

    Under NFPA 14 and FDNY Fire Code 9.26, Class I standpipes require 500 gpm at the FDC with a minimum 100 psi at the most remote outlet. On a s12 practice exam, apply SP − FL = NP (Static − Friction = Net) to confirm you maintain 100 psi after friction loss. This approach helps ensure compliance with FDNY's 65 psi min for Class II outlet pressure too, so always cross-reference both values.

  3. Hose Connection Threads and Couplings -

    FDNY standpipe systems use 2.5″ NST (NH) threads per NFPA 1963 to ensure compatibility with fire department hoselines. A common s12 s13 fdny practice test question asks you to identify coupling types - remember "NH = National Hose" when you see 2.5″. Verify in FDNY's standard details for threads, gaskets, and swivel nuts to avoid mix-ups on exam day.

  4. Pump Discharge Pressure Calculations -

    To overcome elevation pressure losses, use the formula ΔP = 0.434 psi/ft × elevation in feet (e.g., 200 ft adds ~87 psi). The s12 fdny practice test often features scenarios like pumping to a 15th floor standpipe; calculate quickly by remembering 1 psi ≈ 2.31 ft of water. For precision, always reference the FDNY Engineering Bulletin on Pumper Operations (Hydraulics section).

  5. Inspection and Testing Frequencies -

    Per FDNY Fire Code 5.3.3 and NFPA 25, standpipe systems require monthly operational tests, annual hydrostatic tests, and five-year internal inspections. On an s12 practice exam, recall the mnemonic "MAY" (Monthly Ops, Annual Hydro, Quinque-ennial flow) to keep frequencies straight. Always consult FDNY's annual bulletins for any updated testing protocols or amendments.

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