DC Fire Sprinkler study plan

Define the four hazard/occupancy classifications used for sprinkler design and state the density-area basis each implies

Sketch a tree, grid, and loop layout for the same rectangular floor and label where cross mains, branch lines, and feed mains run in each

Compute the number of sprinklers on a branch line and total heads for a 120 ft by 80 ft ordinary hazard area at a stated maximum spacing

Explain how sprinkler spacing, protection area per head, and minimum operating pressure interact when you tighten layout

Walk through a hydraulic calculation by hand for a single branch line, converting pressure to flow and back using the discharge coefficient relationship

Identify when a pipe schedule method is allowed instead of full hydraulic calculation and list the limits that void it

Size mains and branch lines for a given remote-area demand using velocity and friction-loss reasoning

Locate the hydraulically most remote area on a gridded layout and justify the choice in writing

Compare wet, dry, pre-action, and deluge systems on actuation logic, piping condition, and where each is mandated or prohibited

List the acceptance criteria for sprinkler heads by temperature rating, response type, and orientation, and match each to a service condition

Describe valve types (alarm check, dry pipe, deluge, pre-action) and state the trim and gauges each requires

Explain the role of the backflow preventer, waterflow switch, and inspector's test connection in a riser assembly

Sequence a riser installation from rough-in to final connection and name the inspection point at each step

State hanger and bracing spacing rules for different pipe sizes and explain sway bracing for feed and cross mains

Identify clearance requirements between sprinklers and obstructions such as ducts, soffits, and storage

Describe the acceptance test sequence for a new system: hydrostatic, flow, and alarm tests, with pass criteria

Plan a hydrostatic test for a multi-zone system, specifying test pressure, duration, and how to isolate zones

Explain antifreeze and dry-pipe specifics: solution concentration limits, air pressure settings, and slope requirements

Describe corrosion mitigation choices for dry and pre-action piping and when nitrogen or dry air is used

Outline coordination steps with other trades to avoid conflicts between sprinkler mains and ductwork or structure

Build a monthly and annual ITM task list distinguishing owner-performed checks from contractor-performed tests

Explain main drain flow test procedure and how to interpret static and residual pressure readings against supply curves

Describe trip testing of dry pipe and pre-action valves including what constitutes a passing trip time

List the conditions that require a sprinkler head replacement or a system impairment tag

Summarize the impairment and hot work procedures that apply when a sprinkler system is out of service, including notification and fire watch

Map each major ITM frequency to its governing standard so you can cite the source without looking it up

Identify which code edition and local amendments govern design and inspection in the District of Columbia

List the licensing and business requirements a sprinkler contractor and fitter must satisfy in DC

Re-solve two missed calculation problems from weeks 1-2 under timed conditions

Answer a mixed set of code and ITM questions without notes and score them

Review every flagged weak area and write a one-line correction for each

Run one full-length timed practice block under exam conditions