Question

Name two major units of locomotives​

Answer 1

Answer:

The Indian Railways primarily operates fleet of electric and diesel locomotives,

Explanation:

Answer 2

Answer:

Ease

Whether out of necessity to replace the locomotive due to failure, or for reason of needing to maintain the power unit, it is relatively easy to replace the locomotive with another, while not removing the entire train from service.

Maximum utilization of power cars

Separate locomotives facilitate movement of costly motive power assets as needed; thereby avoiding the expense associated with tied up or idle power resources.

Flexibility

Large locomotives can substitute for small locomotives when more power is required, for example, where grades are steeper. As needed, a locomotive can be used for either freight duties, or passenger service.

Obsolescence cycles

Separating motive power from payload-hauling cars enables replacement of one without affecting the other. To illustrate, locomotives might become obsolete when their associated cars are not, and vice versa.

Safety

In an accident, the locomotive may act as a buffer zone to the rest of the train. Depending on the obstacle encountered on the rail line, the heavier mass of a locomotive is less likely to deviate from its normal course. In the event of fire, it might be safer, for example, with diesel locomotives.

Noise

A single source of tractive power (i.e., motors in one place), is quieter than multiple operational power units, where one or more motors are located under every carriage. The noise problem is particularly noticeable in diesel multiple units.

Saves time

The motive power accompanies the cars to be hauled and consequently there is a saving in time.

Maintenance

It may be easier to maintain one power unit than multiple engines/motors. Especially for steam locomotives but also for other types, maintenance facilities can be very dirty environments and it is advantageous not to have to take passenger accommodation into the same depot. This was one reason for the demise of the GWR steam railmotors.

Explanation: