KBC 2023| What is the main purpose of mixer trucks? KBC 2023, Check the answer to the question- What is the main purpose of mixer trucks? By Himani Budakoti - September 29, 2023 KBC 2023, Amitabh Bachchan. (Representative Image) KBC 2023, The options of the question – What is the main purpose of mixer trucks? A. Flattening roads B. Lifting heavy loads C. Mixing cement D. Digging The answer is C. Mixing cement.