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100+ Free Befähigungsprüfung Gas- und Sanitärtechnik Practice Questions
Befähigungsprüfung für das reglementierte Gewerbe Gas- und Sanitärtechnik (Österreich) practice questions are available now; exam metadata is being verified.
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Key Facts: Befähigungsprüfung Gas- und Sanitärtechnik Exam
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The Austrian Befähigungsprüfung Gas- und Sanitärtechnik (NQR Level 6) is a multi-part modular examination administered by the WKO Meisterprüfungsstellen. Passing requires at least Grade 4 (Genügend) on a 1–5 scale across all modules. Since Jan 1, 2024, exam fees are 100% federally funded for the first two attempts. The curriculum spans Drinking Water Hygiene & Sizing (25%), Gas Installations & Safety Testing (25%), Building Drainage & Separators (20%), Barrier-Free Sanitary Design (15%), and Trade Law, Contracts & Costing (15%). This bank offers 100 English-language practice MCQs preserving Austrian technical and statutory standards.
Sample Befähigungsprüfung Gas- und Sanitärtechnik Practice Questions
Try these sample questions to test your Befähigungsprüfung Gas- und Sanitärtechnik exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1According to ÖNORM B 5019, what is the mandatory minimum hot water temperature at the outlet of a central potable water storage heater (Speicheraustritt) during standard operation?
A.50 °C
B.55 °C
C.60 °C
D.65 °C
Explanation: Under ÖNORM B 5019 (hygienic planning, execution, and operation of drinking water heating systems), central water heaters must maintain a continuous water temperature of at least 60 °C at the storage outlet (Speicheraustritt) to effectively inhibit Legionella pneumophila proliferation.
2Under ÖNORM B 5019, what is the minimum permissible water temperature in the circulation return pipe (Zirkulationsrücklauf) when re-entering the water heater?
A.45 °C
B.50 °C
C.55 °C
D.60 °C
Explanation: ÖNORM B 5019 mandates that the water temperature in the circulation system must not drop by more than 5 K between the water heater outlet (60 °C) and the circulation return entrance, establishing a strict minimum return temperature of 55 °C.
3According to ÖNORM B 5019 and the Austrian Drinking Water Ordinance (Trinkwasserverordnung), what is the maximum permissible cold drinking water (PWC) temperature at any draw-off fixture after 30 seconds of flow?
A.15 °C
B.20 °C
C.25 °C
D.30 °C
Explanation: Cold drinking water (PWC) must be kept below 25 °C under all operational conditions pursuant to ÖNORM B 5019 and TWV, with a target temperature below 20 °C to prevent microbiological growth and bio-film formation.
4What does the '3-Liter-Regel' (3-liter rule) in ÖNORM B 5019 dictate regarding domestic hot water installations?
A.Water storage tanks must be drained by at least 3 liters every morning before use.
B.If the pipe volume between the water heater/circulation line and any tapping point exceeds 3 liters, a circulation pipe or trace heating is mandatory.
C.The maximum flow rate at any washbasin tap must not exceed 3 liters per minute.
D.Circulation pumps must have a minimum volumetric displacement of 3 liters per second.
Explanation: The 3-Liter-Regel in ÖNORM B 5019 states that if the internal water volume in the pipework between the water heater outlet (or circulation loop) and the furthest draw-off point exceeds 3 liters, an active circulation system (Zirkulationsleitung) or self-regulating electric trace heating (Begleitheizung) must be installed to prevent stagnation and thermal degradation.
5When carrying out thermal disinfection (Thermische Desinfektion) of a contaminated hot water system under ÖNORM B 5019, what minimum temperature must be reached at each tapping point, and for how long must it flow?
A.60 °C for at least 10 minutes
B.65 °C for at least 5 minutes
C.70 °C for at least 3 minutes
D.80 °C for at least 30 seconds
Explanation: ÖNORM B 5019 specifies that thermal disinfection requires the water temperature at every individual draw-off point to reach at least 70 °C and be flushed continuously for a minimum duration of 3 minutes while taking anti-scalding precautions.
6Under ÖNORM EN 1717, what type of backflow prevention device is required as a minimum standard when connecting potable water to a central heating system containing toxic chemical corrosion inhibitors (Fluid Category 4)?
A.Check valve (Typ EA / Rückflussverhinderer)
B.Non-controllable backflow preventer with different pressure zones (Systemtrenner Typ CA)
C.Controllable backflow preventer with reduced pressure zone (Systemtrenner Typ BA)
D.Pipe interrupter (Typ DB / Rohrbelüfter)
Explanation: Fluid Category 4 encompasses fluids presenting a human health hazard due to toxic, carcinogenic, or radioactive substances (e.g. heating water with chemical inhibitors/antifreeze). ÖNORM EN 1717 requires a controllable backflow preventer with a reduced pressure zone (Systemtrenner Typ BA) featuring an intermediate atmospheric discharge.
7According to ÖNORM EN 1717, what protective measure is mandatory when supplying drinking water to installations handling Fluid Category 5 (e.g. rainwater harvesting tanks, livestock watering troughs, or sewage sumps)?
A.Double check valve (Typ EC)
B.Systemtrenner Typ BA with test cocks
C.Unrestricted air gap (Freier Auslauf Typ AA or AB)
D.Pressure vacuum breaker (Typ DC)
Explanation: Fluid Category 5 presents severe microbiological and pathogen hazards (bacteria, viruses). Mechanical backflow preventers like Type BA are NOT permitted for Category 5; only an unrestricted physical air gap (Freier Auslauf Typ AA or Typ AB) provides safe separation under ÖNORM EN 1717.
8If laboratory water analysis in a commercial property reveals a Legionella concentration exceeding 10,000 CFU/100 ml (KBE/100 ml), what immediate statutory action is mandated under ÖNORM B 5019?
A.Re-test the water after 3 months without operational modifications.
B.Issue an immediate showering ban (Duschverbot), notify the public health officer (Amtsarzt), and initiate technical hazard analysis and remediation.
C.Lower the water heater thermostat to 45 °C to slow down bacterial metabolism.
D.Permanently shut down and demolish the entire plumbing installation.
Explanation: A concentration > 10,000 CFU/100 ml represents an extremely high contamination level ('extrem hohe Kontamination') under ÖNORM B 5019. It mandates an immediate ban on showering (due to aerosol inhalation risk), formal reporting to the local health authority (Amtsarzt / Bezirksverwaltungsbehörde), and immediate technical remediation.
9In the hydraulic dimensioning of potable water distribution pipes under ÖNORM EN 806-3 and ÖNORM B 2531, why is the design peak flow rate (Spitzendurchfluss Vs) lower than the total sum of all individual fixture calculation flows (Summendurchfluss VR)?
A.Because pipes experience friction losses that reduce flow rates.
B.Because probability calculation accounts for the non-simultaneous usage of tapping fixtures in real operation.
C.Because pressure reducing valves throttle 50% of the incoming municipal water flow.
D.Because water expands when heated, reducing total volumetric demand.
Explanation: The peak flow rate (Vs) is calculated using statistical simultaneity curves (Gleichzeitigkeitskurven) because in standard building operations, it is statistically improbable that all installed water fixtures will be opened at full flow at the exact same second.
10To prevent excessive flow noise, cavitation, and water hammer in domestic drinking water installations, what is the maximum recommended flow velocity (Fließgeschwindigkeit) in main distribution pipes under ÖNORM EN 806-3?
A.0.5 m/s
B.2.0 m/s
C.4.5 m/s
D.7.0 m/s
Explanation: ÖNORM EN 806-3 and ÖNORM B 2531 recommend a maximum flow velocity of 2.0 m/s in main distribution pipes and risers (up to 2.5 m/s in short individual connection lines) to prevent acoustic disturbances, erosion corrosion, and hydraulic water hammer.
About the Befähigungsprüfung Gas- und Sanitärtechnik Practice Questions
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