Sanitärmeister/in HFP cheat sheet
Sanitärmeister/in HFP · Keep the key ideas within reach.
Potable supply, hydraulics, hot water and hygiene
Separate static pressure, flow performance and actual hydraulic losses.
Protect potable water against the actual cross-connection hazard.
Coordinate hygiene, thermal expansion and scald protection using current criteria.
Suitable materials and documented commissioning matter beyond clear appearance.
Drainage, venting, backwater and maintainable water routes
Trace flow, pressure, geometry and access through the complete drainage system.
A trap seal and venting serve connected but distinct functions.
Air-admittance valves do not provide every positive-pressure vent function.
Backwater, lifting and special drainage need their actual design and maintenance basis.
Water heating, heating circuits and gas-system coordination
Distinguish potable, heating and energy-transfer circuits.
Combustion air, flue performance and CO hazards require actual competent verification.
Regulation, shutoff, expansion and overpressure protection have distinct functions.
Written concepts do not authorize gas, electrical or commissioning work.
Engineering models, drawings, evidence and project decisions
State the system boundary and assumptions before calculation.
Units, sign conventions and uncertainty are part of the answer.
Verification against a specification differs from validation for an intended use.
Drawings need a declared convention and controlled revision.
Classroom models do not authorize physical operation or structural approval.
Construction planning, safe boundaries, inspections and controlled changes
Clarify actual responsibility, approved drawings and change authority.
Hazards require task-specific controls, not one universal PPE recipe.
Inspect concealed requirements before they become inaccessible.
Separate net quantities, stated allowances and unresolved handover issues.
Finance and accounting
Profit and cash differ because of credit, stock and capital spending.
Break-even = fixed costs ÷ unit contribution; contribution funds fixed costs and profit.
Gearing formulas vary; use the debt and capital definitions supplied in the exercise.
Payback ignores later cash flows; NPV discounts all cash flows.
Liquidity ratios need interpretation, not just calculation.
Operations management
Capacity utilisation = actual output ÷ maximum output × 100.
Break-even = fixed costs ÷ contribution per unit; margin of safety = current sales − break-even.
JIT cuts holding costs but raises supply-chain vulnerability.
TQM is preventive and company-wide; quality control is inspection-based.
Critical path is the longest route through the network and sets project duration.