Final answer:
The largest concentration of railroad shops was indeed located in Altoona, PA.
Step-by-step explanation:
The statement is true.
The largest concentration of railroad shops was indeed located in Altoona, PA. Altoona was home to the Pennsylvania Railroad and its main repair facility. The location was chosen because it was centrally located on the mainline between Philadelphia and Pittsburgh, making it convenient for repairs and maintenance. Altoona also had the advantage of being situated in a valley, providing a natural route for the railway.