Which of the following items would be used to check DBG on a T-rail installation?

The bayonet gauge is specifically designed for checking the debounce ground rail (DBG) on T-rail installations. This tool allows for precise measurement of the rail height and alignment, which are critical factors in ensuring that the elevator operates smoothly and safely. In T-rail setups, maintaining the correct distance and alignment is essential for proper elevator function.

The bayonet gauge provides a straightforward method to assess these dimensions quickly and effectively, making it an essential tool for elevator technicians and maintenance workers when dealing with rail installations. This tool’s unique design facilitates accurate measurements, ensuring the integrity of the installation is maintained.

Other tools, such as laser levels, measuring tapes, and calipers, while useful in various measurement tasks, do not specifically cater to the unique requirements for checking the DBG in T-rail systems. Laser levels are typically used for leveling surfaces, measuring tapes for standard lengths, and calipers for precise internal or external measurements, which do not align with the specific needs of rail height and overall alignment checks in this context.