easy KNX Basic exam questions
KNX Basic Certification mock exam questions selected at easy level. Ideal for warming up before the exam or revisiting the fundamentals.
Easy level questions
Q01
The KNX standard is internationally standardised under the reference ISO/IEC 14543-3.TrueFalse1. System Overview· Normung· EasyCorrect answerTrueLearning tipKNX is standardised by ISO/IEC 14543-3 (Information technology — Home Electronic System (HES) Architecture). It is also covered at European level by the EN 50090 series and at Chinese level by GB/Z 20965. This multi-level recognition is one reason KNX is positioned as a vendor-neutral open standard.
Q02
The four communication media supported by KNX are TP, IP, RF and PL.TrueFalse1. System Overview· Übertragungsmedien· EasyCorrect answerTrueLearning tipKNX supports four physical media: TP (twisted-pair, the reference bus), IP (Ethernet/Wi-Fi via tunnelling or routing), RF (radio at 868 MHz) and PL (Powerline at 110 kHz over the mains). In practice TP and IP dominate today, while PL110 has seen very limited deployment in new installations since around 2010.
Q03
What is the main carrier frequency used by KNX RF in Europe?- A.433.92 MHz
- B.868.3 MHz
- C.2.4 GHz
- D.5.8 GHz
4. KNX RF· Physikalische Schicht· EasyCorrect answerB — 868.3 MHzLearning tipKNX RF operates in the European ISM band at 868.3 MHz, which is lightly used and licence-free. The encoding is Manchester at a nominal rate of 16.384 kbit/s. Choice A (433 MHz) is used by other low-power systems (some remote controls, weather stations). Choice C (2.4 GHz) is the Wi-Fi/Zigbee/Bluetooth band. Choice D (5.8 GHz) is a higher Wi-Fi band, unrelated to KNX RF.
Source: Wikipedia EN — KNX (RF section)Q04
What is the electrical classification of the KNX TP bus power supply?- A.230 V AC
- B.12 V DC
- C.30 V DC SELV
- D.48 V DC PoE
5. TP Installation· Busspannung· EasyCorrect answerC — 30 V DC SELVLearning tipThe KNX TP bus is powered at 30 V DC SELV (Safety Extra Low Voltage). This voltage simultaneously powers the low-consumption devices and carries the differential telegrams superimposed on the DC level. Choice A (230 V AC) is the mains voltage, not the bus. Choice B (12 V DC) is too low and not a KNX value. Choice D (48 V DC PoE) is an Ethernet-related standard with no KNX TP equivalent. The SELV classification permits routing in the same conduit as other low-voltage cables.
Q05
Which notation is used in ETS for a Group Address in the 3-level structure?- A.Area.Line.Device (e.g. 1.2.3)
- B.Main/Middle/Sub (e.g. 1/2/3)
- C.Group/Subgroup (e.g. 1/3)
- D.Hex (e.g. 0x102003)
6. ETS Project Design· Gruppenadressen· EasyCorrect answerB — Main/Middle/Sub (e.g. 1/2/3)Learning tipGroup Addresses in the 3-level structure use the notation Main/Middle/Sub, for example 1/2/3. Choice A uses the dot separator, which is reserved for individual addresses — a classic exam trap. Choice C corresponds to the 2-level structure (Main/Sub, e.g. 1/3), not the 3-level one. Choice D is not a KNX format at all.
Q06
The KNX Basic theoretical exam is open-book: candidates may consult their PDF or paper course documentation during the test.TrueFalse10. Exam Meta· Prüfungsregeln· EasyCorrect answerTrueLearning tipTrue. The official KNX Basic Course exam regulations explicitly allow candidates to use the course handbook and personal notes during the theoretical part, on paper or in printed PDF form. The intent is to assess comprehension of the concepts rather than memorisation of figures such as the maximum number of devices per line or DPT identifiers. Training centres are expected to enforce the no-communication rule, but the documentation itself is fair game.