NMDC Maintenance Assistant Syllabus and Exam Pattern 2025

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The National Mineral Development Corporation (NMDC) has released the NMDC Maintenance Assistant syllabus 2025 for the written exam. Along with it, the notification also contains details regarding the NMDC Maintenance Assistant exam pattern. The aspirants for the post of NMDC Maintenance Assistant are advised to check the syllabus and exam pattern while preparing for the exam. Thorough understanding of the syllabus will guide them through their preparation so that the aspirants can cover all the topics.

The candidates should be thorough with each section or subject included in the NMDC Maintenance Assistant syllabus to avoid missing out on any topic.
The candidates will be selected based on two rounds which will be including a written test and a Trade test.
The candidates should also make sure that they prepare all the topics according to the post they are applying for.

To know more about the NMDC Maintenance Assistant syllabus 2025 and exam pattern, read on.

Download the NMDC Maintenance Assistant Syllabus PDF 2025 Here!

NMDC Maintenance Assistant Exam Pattern 2025

The NMDC will select the candidates based on their performances in two stages of the examination. These are the written test and trade test. The candidates aspiring for the post of NMDC Maintenance Assistant (Mech. And Elect.) will have to undergo the written test consisting of Part I and Part II. The written examination will be divided into the same parts for both posts. The candidates can follow the below given NMDC Maintenance Assistant exam pattern to go ahead with their preparations.

Written Exam

The maximum marks for the examination are 100.
The candidates who will qualify in the written exam shall be called for the Trade test.
There is no negative marking in the exam.

Part	Subject	Marks
Part I	Subject Knowledge (on specific trade)	30 marks
Part II	General Knowledge	50 marks
Part II	Numerical and Reasoning Ability	20 marks

NDMC Trade Test

Candidates clearing the written exam will be called in for a Trade Test. This test will be conducted for 100 marks. Candidates will be called in the ratio 1:3. The test will be qualifying in nature.

Check the category-wise NMDC Maintenance Assistant Cut Off Marks here.

NMDC Maintenance Assistant 2025 Syllabus

The NMDC Maintenance Assistant syllabus 2025 consists of three subjects i.e. general knowledge, Numerical & Reasoning ability, and Subject Knowledge of specific trade. The candidates are advised to properly go through the exam syllabus to make sure that their preparation goes in the right direction. In the following table, the subjects and their syllabus are provided.

Subject	Syllabus
Part I - Subject Knowledge (on specific trade)
Subject Knowledge (Mechanical Engineering)	Hand & Power Tools Systems of Measurement Fasteners Cutting tools Limits, Fits & Tolerances Drilling machine Taps and Dies Sheet Metal Welding processes Introduction to Hydraulics & Pneumatics Introduction to Engine Diesel Engine Components Valves & Valve Trains Engine Assembly Need for Cooling systems Basic cooling system components Need for lubrication system Intake & exhaust systems Intake system components Exhaust system components Diesel Fuel Systems Diesel fuel system components Electronic Diesel control Marine & Stationary Engine Emission Control Troubleshooting Prepare a profile with appropriate accuracy as per drawing Manufacture different hand tools by forging and heat treat the same Manufacture simple sheet metal items and join by soldering Join MS sheet by riveting Join mechanical components/metal parts by Arc welding Cut and join M.S. parts with Gas welding Repair and assemble simple machine parts from the blueprint and rectify faults of assembly Join MS sheets by Gas welding in different positions Weld different types of MS pipe joints by SMAW
Subject Knowledge (Electrical Engineering)	Implementation in the shop floor of the various safety measures Visit different sections of the Institute Demonstration on elementary first aid Artificial Respiration Demonstration of Trade hand tools Identification of simple types- screws, nuts & bolts, chassis, clamps, rivets etc. Use, care & maintenance of various hand tools Practice in soldering Measurement of Resistant and Measurement of specific Resistant Routine care & Maintenance of Batteries Types of drills description & drilling machines, proper use, care and maintenance Description of taps & dies, types in rivets & riveted joints Use of thread gauge Connection of Calling Bell, Buzzer, Alarms, Electric Iron, Heater, Light Rewinding /assembly of different electrical appliances Study, maintenance and repair of domestic equipment –Electric Kettle, Heater /Immersion Heater, Hot Plate, Geyser, Washing machine, Cooking range, Pump set.
Part II
Numerical Ability	Relationship Concepts Arithmetical Reasoning Decision-Making Space Visualization Verbal & Figure Classification Analysis & Judgment Coding-Decoding Similarities & Differences Problem-Solving Analogies Directions Arithmetical Number Series Figural Series Discrimination Visual Memory Data Sufficiency
Reasoning Ability	Puzzles Data Interpretation Analytical Reasoning Verbal Reasoning Non-Verbal Reasoning Logical Reasoning Data Sufficiency
General Knowledge	Botany Indian Parliament Inventions in the World Basic Computer Physics Famous Days & Dates Indian Economy Geography Famous Books & Authors Zoology Environment Sports Indian Politics Indian Culture Chemistry Indian History

Check the NMDC Maintenance Assistant Eligibility Criteria before applying for the exam.

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NMDC Maintenance Assistant 2025: Preparation Strategy

To succeed in qualifying for the examinations, the candidates must prepare a strategy to give adequate time to all the topics in the NMDC Maintenance Assistant syllabus. The candidates can follow the guidelines below to prepare for the examinations.

The candidates should try to attempt as many previous year’s question papers to get an idea about the question distribution in the paper.
The candidates can also take up mock tests to boost their skills.
They must give proper time to their studies and should prepare a timetable.
The candidates should give specific attention to the technical subjects of their trade.
They must also thoroughly go through the exam pattern and syllabus so that they do not miss out on any important topic.

Go through more NMDC Maintenance Assistant Preparation Tips here.

NMDC Maintenance Assistant Exam 2025: Books for Preparation

The selection of the best books for the NMDC Maintenance Assistant syllabus preparation is of utmost importance. The candidates should only go for the books that cover all the topics of the syllabus. They may download the PDFs of the books available online to help them carry the study material anywhere with them to ensure a quick revision. The following books can be referred to by the candidates to ace their examinations.

Subject	Books	Publisher/ Author	Description
Electrical	NMDC Maintenance Assistant (Mechanical and Electrical)	Sura Books Pvt. ltd.	It contains an examination scheme of Numerical Ability Reasoning Ability Technical I. Electrical & Electronics Engineering II. Electronics & Communication Engineering III. Mechanical Engineering IV. Civil Engineering
Electrical	Maintenance of Electrical Equipment	M.A. Chaudhary	An apt book for all the topics of electrical maintenance.
Mechanical	Handbook for Mechanical Maintenance Engineers	Jnyani R. Mahato	It is the most updated guide to learn mechanical maintenance.
General Knowledge	General Knowledge	Arihant	It covers the general knowledge, history, geography and current affairs.
General Knowledge	General Knowledge	Lucent	It contains general questions about Indian politics, economics, history and geography.
Reasoning	Analytical Reasoning	M.K.Pandey	It contains effective study material for reasoning based examinations.
Reasoning	Verbal and Non-verbal Reasoning	Dr. R.S. Aggarwal	It has the latest trends and patterns related to logic and reasoning.

Get the list of best NMDC Maintenance Assistant Books here.

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Latest NMDC Maintenance Assistant Updates

Last updated: Jun 12, 2025

-> NMDC recruitment 2025 application form has been released at the official website.

-> The NMDC recruitment 2025 notification has been released for the Maintenance Assistant.

-> A total of 446 vacancies are announced for Maintenance Assistant recruitment.

-> Candidates can fill NMDC recruitment 2025 form till June 14.

-> The selection of the candidates depends on two stages, which are the Written Test and Trade Test.

-> The selected candidates for Maintenance Assistant will get an NMDC Maintenance Assistant Salary of Rs. 18,000 to Rs. 31,850.

-> Candidates appearing in the exam can refer to the NMDC Maintenance Assistant syllabus and exam pattern.

NMDC Maintenance Assistant Syllabus and Exam Pattern 2025 FAQs

Where can I find the NMDC Maintenance Assistant exam pattern?

The NMDC Maintenance Assistant exam pattern 2025 is mentioned in the official notification released by NMDC on its official website.

What are the selection criteria for the NMDC Maintenance Assistant post?

The candidates will be selected based on their performance of two stages which are a written test and a trade test.

Is the syllabus the same for every trade under the NMDC Maintenance Assistant post?

The syllabus is the same for every trade however part I of the question paper will be varying as per the trade.

How many marks does each stage of the examination carry?

The written exam will be divided into 2 parts and will carry 100 marks. The Trade test will carry 100 marks.

What to do after I have given the written test for NMDC Maintenance Assistant exam?

After the written exam, you can prepare for the trade test. However, you must keep checking the results for the written exam as you will be called for the trade test only if you qualify for the written test.

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