SLB determines the limits of block section and ________. A. Block Section B. Station Section C. Station Limit D. None of these

The correct answer is: A. Block Section

A block section is a section of track that is controlled by a single signal. The SLB (Signalling Locomotive Block) determines the limits of the block section and ensures that only one train is in the block section at a time. This prevents collisions between trains.

The other options are incorrect because they do not accurately describe the function of the SLB.

• Option B, Station Section, is incorrect because the SLB does not determine the limits of the station section. The station section is a section of track that includes the station and the approach tracks. The limits of the station section are determined by the station signals.
• Option C, Station Limit, is incorrect because the SLB does not determine the station limit. The station limit is the point at which the station section ends and the block section begins. The station limit is determined by the station signals.
• Option D, None of these, is incorrect because the SLB does determine the limits of the block section.