CSIR NAL MTS Answer Key 2026: Provisional Key & Objection Window

CSIR NAL MTS Answer Key 2026 Released

The Council of Scientific and Industrial Research (CSIR) through its constituent laboratory, CSIR-National Aerospace Laboratories (NAL), Bengaluru, has released the provisional answer key for the Multi-Tasking Staff (MTS) written examination. The examination was conducted on 31 October 2026, and the provisional answer key along with the question booklet was published on the same day. This release brings relief to thousands of candidates who appeared for the MTS recruitment under Advertisement No. 11/2026. The answer key is available in a comprehensive 66-page PDF that includes the question booklet in Hindi, English, and Kannada, followed by the provisional answers for all 150 questions. Candidates can now cross-check their responses and estimate their scores. The objection window is open from 1 November to 5 November 2026, up to 5:00 PM, allowing candidates to challenge any discrepancies in the provisional answers. This article provides a detailed overview of the CSIR NAL MTS Answer Key 2026, including steps to download, objection procedures, and other essential information.

About Council of Scientific and Industrial Research (CSIR)

The Council of Scientific and Industrial Research (CSIR) is India's premier national research and development organization, operating under the Ministry of Science and Technology. CSIR-NAL, located in Bengaluru, is one of its leading laboratories specializing in aerospace research and development. The MTS recruitment is aimed at filling support staff positions across various departments. The written examination for MTS is designed to assess candidates on General Intelligence, Quantitative Aptitude, General Awareness, and English Language. The provisional answer key is a crucial document that provides transparency in the selection process. It allows candidates to verify their answers and raise objections if they find any errors. The key is provisional, meaning it is subject to change based on valid objections. The final answer key will be published after the objection window closes and all representations are reviewed. This article will guide you through every aspect of the CSIR NAL MTS Answer Key 2026, ensuring you have all the necessary information at your fingertips.

CSIR NAL MTS Answer & Objection Window

The provisional answer key for CSIR NAL MTS 2026 was released on 31 October 2026, the same day as the written examination. The key is available in a single PDF that contains the question booklet in three languages—Hindi, English, and Kannada—along with the provisional answers. The document spans 66 pages, with the answer key table located on the final page. Candidates can download the PDF from the official CSIR-NAL website. The objection window is a critical period for candidates to challenge any incorrect answers. It opens on 1 November 2026 and closes on 5 November 2026 at 5:00 PM. Objections must be submitted via email only, to the designated address, with supporting documentary evidence. The official notification does not specify any objection fee, and submissions through other modes will not be accepted. Candidates are advised to carefully review the answer key and submit any objections within the stipulated time frame.

Key Details of CSIR NAL MTS Answer Key 2026

Section-wise Distribution of Questions

The written examination consisted of 150 multiple-choice questions divided into four sections. The table below provides a breakdown of the sections and the number of questions in each.

PDF Structure and Page Details

The official PDF is a comprehensive document that includes the question booklet in three languages and the provisional answer key. The table below outlines the page numbers and their contents to help candidates navigate the PDF efficiently.

How to Challenge Answer Key

If you find any discrepancy in the provisional answer key, you have the right to challenge it. The objection process is straightforward but must be followed precisely. Here are the steps to raise objections against the CSIR NAL MTS Answer Key 2026:

1. Download the official provisional answer key PDF from the CSIR-NAL website.
2. Identify the question number(s) for which you believe the answer is incorrect.
3. Prepare a clear representation explaining why the published answer is wrong, citing reliable sources or references.
4. Attach documentary evidence (e.g., textbook excerpts, official references) supporting your claim.
5. Compose an email addressed to the designated email ID (provided in the official notification).
6. Use the exact subject line as prescribed in the notification (e.g., "Objection against Provisional Answer Key for MTS Exam 2026").
7. Send the email before 5:00 PM on 5 November 2026.
8. Keep a copy of the sent email and attachments for your records.

Note: Objections submitted through any other mode (post, courier, in-person, or to a different email address) will not be entertained. Ensure your objection is precise and well-supported to facilitate a fair review.

Step-by-Step Download Guide

Downloading the CSIR NAL MTS Answer Key 2026 is a simple process. Follow these steps to access the PDF:

1. Visit the official CSIR-NAL website at nal.res.in.
2. Navigate to the "Recruitment" or "Latest Announcements" section.
3. Look for the notification titled "Publishing Question booklet and Provisional Answers key notification" under Advertisement No. 11/2026.
4. Click on the link to open the PDF.
5. Download the 66-page PDF to your device.
6. Open the PDF using a compatible reader.
7. Scroll to page 66 to view the provisional answer key table.
8. Compare your answers with the key and note any discrepancies.
9. Save the PDF for future reference.

Alternatively, you can use the direct link provided in the table below.

Official Key Download Link

For quick access, here are the direct links to download the CSIR NAL MTS Answer Key 2026 and other relevant resources:

Ensure you download the PDF from the official website only to avoid any discrepancies.

Sample Answers from Provisional Key

The provisional answer key contains answers for all 150 questions. Below is a sample of the first ten answers from the General Intelligence section for reference. For the complete key, please refer to page 66 of the official PDF.

How to Calculate Marks Using the Answer Key

After downloading the answer key, candidates can estimate their scores by following these steps:

1. Compare your marked answers with the provisional answers.
2. Count the number of correct answers.
3. Count the number of incorrect answers.
4. Count the number of unanswered questions.
5. Apply the marking scheme: typically, each correct answer awards 1 mark, and there may be a negative marking of 0.25 or 0.33 for incorrect answers. However, the official notification does not specify the exact marking scheme. Candidates are advised to refer to the examination instructions or the recruitment advertisement for details.
6. Calculate your estimated score using the formula: (Correct × Marks per correct) - (Incorrect × Negative marks).

Note: The answer key is provisional, and the final score may vary after objections are resolved.

Final Answer Key and Result

The current answer key is provisional. After the objection window closes on 5 November 2026, CSIR-NAL will review all valid objections and may revise the answer key if necessary. The final answer key will be published on the official website. The result for the MTS written examination will be declared after the final answer key is released. Candidates are advised to regularly check the CSIR-NAL website and their registered email for updates. The dates for the final answer key and result have not been announced yet.

Important Dates

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