easy BACnet exam questions

Easy level questions

1. Q01

   BACnet relies on an object-oriented model: every device exposes Objects (e.g. Analog Input, Binary Output) that contain Properties (Present_Value, Object_Name, Description, etc.).

   TrueFalse

   1. Architecture· Objektorientiertes Modell· Easy

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   Correct answer

   True

   Learning tip

   The BACnet model is built from three building blocks: Objects (functional entities such as sensors, command points or schedules, with 60+ standardised types), Properties (attributes of an Object, e.g. Present_Value, Object_Name, Description, Status_Flags) and Services (operations performed on Objects, such as read, write or COV notification). This is markedly different from KNX, which uses Group Objects bound to Group Addresses with no comparable object-oriented hierarchy.

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2. Q02

   ReadProperty and WriteProperty are the most widely used BACnet services: they let a client (typically the BMS) read or write the value of a Property of a remote Object.

   TrueFalse

   2. Services· ReadProperty / WriteProperty· Easy

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   Correct answer

   True

   Learning tip

   ReadProperty (Service Choice 12) and WriteProperty (Service Choice 15) are the foundation of traditional BMS polling. The supervisor periodically queries each Object on every controller to refresh its point database. The pattern is simple but verbose on the wire and is increasingly replaced by ReadPropertyMultiple for batched reads and SubscribeCOV for change-driven updates.

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