Question bank – chief loco Inspector -Diesel Part – 6

23-02-2019
What kinds of electric multiple units does IR operate?
June 21, 2019

The Mumbai region with 1.5kV DC traction has several models of EMUs, classified from WCU-1 through WCU-15 (and beyond??). Most models have DC traction motors with rheostatic control (resistance banks to vary the input power supply). DC EMUs are also used on the Lonavala-Pune section. Information on the precise differences among various older EMU

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What does the term “multiple unit” or “MU” mean, and what is an EMU or DMU?
June 21, 2019

There are two senses of the phrase "multiple unit" to be distinguished. Two or more regular locomotives may be coupled together for greater hauling capacity. In such a cases the locos are said to be operating as multiple units, or to be "MU'ed together" (US terminology: "lash-up"). ये भी पढ़े - योगासन का

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What are the technical specifications for the various loco classes?
June 21, 2019

The section on diesel and electric loco specifications has information on most diesel and electric locomotives of IR, and includes figures on power, max. speed, serial numbers, etc. The information is drawn mostly from Jal Daboo's book, with updates and additions from IRFCA members. Also see the section on additional electric loco specifications

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Steam Locomotive Classes – Introduction
June 21, 2019

This FAQ section was not meant to be a comprehensive list of features or history of locomotive classes. Some classes have been selected for railfan interest, and in the case of locos that are restricted to certain areas, information on where they may be seen today has been provided. Detailed information on dimensions and operating figures, makers'

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Locomotive – What does ‘Bo-Bo’ or ‘Co-Co’ mean?
June 20, 2019

Diesel and electric locos' wheel arrangements are described using a system where the axles of a loco are counted, with powered axles being described using letters and the unpowered axles (if any) indicated by digits. A set of two independently powered axles on a bogie is indicated by ‘Bo’, and a set of three independently powered axles on a

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Locomotive – What do the notations such as ‘2-4-2’ mean?
June 20, 2019

Traditionally, steam locomotives have been classified by their wheel arrangements. The system most widely used was the Whyte system. In this, the loco's leading non-powered wheels, the (usually coupled) driving wheels, and the trailing non-powered wheels are indicated separately. Indian practice (following the UK) was to count wheels and not just

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