Which statement about platform frame construction is false?

Which statement about platform frame construction is false?

• A. All three statements are true.
• B. Statement 2 is false (Platform frame is not primarily in unibody vehicles).
• C. Statement 1 is true, statement 2 is true, statement 3 is false.
• D. Statement 1 is true, statements 2 and 3 are false.

Answer: (B)

Platform frame construction describes how the vehicle’s structural backbone is formed—either as a separate frame (body-on-frame) or as a unified structure where the body and chassis share the load path (unibody). In practice, many modern vehicles use a unibody design, where a defined platform still serves as the underlying structural base, even though there isn’t a distinct, detachable frame. The statement claiming that platform frame is not primarily in unibody vehicles is not accurate because the platform concept often underpins unibody architectures as the common base for multiple models, with the structure integrated into the body rather than a separate frame. Therefore, that assertion is the false one. The other statements align with the general distinctions between the two approaches, describing how load paths and construction differ between body-on-frame and unibody designs.

Platform frame construction describes how the vehicle’s structural backbone is formed—either as a separate frame (body-on-frame) or as a unified structure where the body and chassis share the load path (unibody). In practice, many modern vehicles use a unibody design, where a defined platform still serves as the underlying structural base, even though there isn’t a distinct, detachable frame. The statement claiming that platform frame is not primarily in unibody vehicles is not accurate because the platform concept often underpins unibody architectures as the common base for multiple models, with the structure integrated into the body rather than a separate frame. Therefore, that assertion is the false one. The other statements align with the general distinctions between the two approaches, describing how load paths and construction differ between body-on-frame and unibody designs.