Which component, located in the engine control compartment, shows the maximum speed for the movement of the train?

• A. Fixed Signal Indicator
• B. Cab Signal Indicator
• C. Indication
• D. Block Signal

Answer: (B)

The main idea here is that the train’s speed guidance comes from the cab signaling system. The component in the engine control compartment that shows the maximum speed allowed for the current block is the Cab Signal Indicator. It receives the cab signal from the track and displays the corresponding speed or speed category to the engineer, so you know the highest speed you may safely run in that block.

Fixed Signal Indicator would reflect the status of fixed track-side signals but not the specific speed for the block. Indication is too generic and doesn’t specify speed limits. Block Signal shows whether the block ahead is occupied, not the allowed speed.