Jawaban:

1. A train can consist of a combination of one or more locomotives and attached railroad cars, or a self-propelled multiple unit (or occasionally a single powered coach, called a railcar). Trains can also be hauled by horses, pulled by a cable, or run downhill by gravity.

2. The most popular items for trains to transport include:

- Bulk cargo like iron ore or coal.

- Containerization carrying shipping containers.

- Special cargo like cars or steel plates, which are not suitable for containers or bulk.

3. Ahopper car (US) or hopper wagon (UIC) is a type of railroad freight car used to transport loose bulk commodities such as coal, ore, grain, and track ballast. Two main types of hopper car exist: covered hopper cars, which are equipped with a roof, and open hopper cars, which do not have a roof.

4. A passenger train is a train used to transport people along a railroad line. These trains may consist of unpowered passenger railroad cars (also known as coaches or carriages) hauled by one or more locomotives, or may be self-propelled; self propelled passenger trains are known as multiple units or railcars.

5. Types of Trains

High speed trains. Source: Flickr. ...

Inter-city trains. Inter-city trains generally mean trains traveling long distances connecting metropolitan areas. ...

Commuter/regional trains. Caltrain locomotives (Source) ...

Rapid transit. ...

Light rail. ...

Modern streetcar. ...

General rail characteristics matrix.