NEIEP Mechanics Practice Exam

How are the ends of the rails designed to be connected together?

1. They are welded

2. They have a tongue and groove

3. They are bolted together

4. They are simply laid end to end

The correct answer is: They have a tongue and groove

The connections between the ends of railway rails are often designed using a method involving a tongue and groove system. This design allows for the rails to fit together snugly, providing stability and strength to the track. The tongue and groove configuration aids in the alignment of the rails, which is crucial for maintaining the integrity of the track over time, especially under the stress from passing trains. This type of connection can help reduce the likelihood of rail misalignment, which is essential for safe and efficient train operation. Utilizing a tongue and groove design also allows for some movement due to thermal expansion and contraction, while still ensuring the rails remain securely in place. This flexibility is important in regions where temperature changes can cause the rails to expand or contract significantly.