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With ISRO Telemetry Tracking and Command Network (ISTRAC) inviting online applications under Advertisement No. ISTRAC:02:2026 for Technical Assistant, Scientific Assistant, Library Assistant, Technician-B, Draughtsman-B, and Cook-A posts, thousands of candidates are now searching for the best ISRO ISTRAC mock test 2026 series to crack the Written Test/Computer Based Test (CBT).
Since the selection process is entirely CBT and skill-test based with no interview stage for most posts, practicing with high-quality mock tests is the single most important step toward qualifying. This blog covers everything you need to know about ISTRAC mock tests 2026 — exam pattern, marking scheme, subject-wise strategy, and how to make the most of mock test practice before the actual exam.
ISRO 2026 Technical Assistant Previous Year Question Paper PDF Download
| Subject | Free PDF |
|---|---|
| Mechanical Engineering | |
| Electrical Engineering | |
| Electronics Engineering | |
| Civil Engineering |
ISRO 2026 Technician-B Previous Year Question Papers PDF Download
1: Between the period of 1858-1947, how many Viceroys ruled over India?
| Technician-B Trade | Download Link (PDF) |
|---|---|
| Technician-B Photographer / Digital Photographer (2016) | |
| Technician-B Turner (2016) | |
| Technician-B Plumber (2016) | |
| Technician-B Motor Vehicle Mechanic (2016) | |
| Technician-B Diesel Mechanic (2016) | |
| Technician-B Carpenter (2016) | |
| Technician-B Grinder (2016) | |
| Technician-B Electroplating (2016) | |
| Technician-B AC & Refrigeration (2016) | |
| Technician-B Electrical (2016) | |
| Technician-B Fitter (2016) | |
| Technician-B Electronics Mechanic | |
| Technician-B Refrigeration & AC | |
| Technician-B Plumber | |
| Technician-B Mason | |
| Technician-B Grinder | |
| Technician-B Fitter |
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Join NowISRO ISTRAC Recruitment 2026 Overview – Details Here!
| Particulars | Details |
|---|---|
| Organisation | ISRO Telemetry Tracking and Command Network (ISTRAC), Bengaluru |
| Advertisement No. | ISTRAC:02:2026 |
| Notification Date | 27 June 2026 |
| Recruitment Year | 2026 |
| Name of Posts | Technical Assistant, Scientific Assistant, Library Assistant-A, Technician-B, Draughtsman-B, Cook-A |
| Mode of Application | Online Only |
| Application Start Date | 27 June 2026 (10:00 AM) |
| Application Last Date | 20 July 2026 (11:55 PM) |
| Official Website | www.isro.gov.in / www.istrac.gov.in |
| Job Location | Bengaluru, Lucknow, Shriharikota, Sri Vijayapuram (A&N Islands), Thiruvananthapuram, and other ISRO/DOS Centres across India |
| Posting | Selected candidates are liable to be posted anywhere in India based on organisational requirements |
| Nature of Posts | Temporary, but likely to continue |
| Selection Process | Written Test and Skill Test/Trade Test (where applicable) |
| Pay Level | As per the respective post under the 7th Central Pay Commission (7th CPC) |
| Who Can Apply | Eligible Indian Citizens meeting the prescribed educational and age criteria |
| Application Fee | As per the official notification (post/category-wise, if applicable) |
| Notification Status | Released |
| Apply Mode | Online through the official ISRO/ISTRAC recruitment portal |
Exam Dates to Remember While Planning ISTRAC Mock Test 2026 Practice
| Event | Date |
|---|---|
| Application Start Date | 27.06.2026 (10:00 AM) |
| Application Last Date | 20.07.2026 (11:55 PM) |
| Cut-off Date for Age, Qualification & Experience | 20.07.2026 |
| Written Test / CBT | To be notified (Conducted in Bengaluru or other cities across India) |
| Skill Test | To be notified (Conducted only in Bengaluru for shortlisted candidates) |
ISRO ISTRAC Mock Test 2026 – Attempt Link Here!
The ISTRAC written test/CBT follows a curriculum-based syllabus with a strict negative marking scheme of +1 for every correct answer and -0.33 for every wrong answer. This negative marking format makes accuracy far more valuable than guesswork, and mock tests are the only reliable way to build the discipline needed to avoid silly errors under time pressure. Since the exam is objective (MCQ-based) and time-bound — 80 questions in 1.5 hours for Technical Assistant, Scientific Assistant, Library Assistant, Technician-B and Draughtsman-B posts, and 60 questions in 1.5 hours for Cook-A — regular mock test practice helps candidates learn to pace themselves, question by question, without running out of time.
| Mock Test Name | Free |
|---|---|
| ISRO ISTRAC Technical Assistant Mock Test 2026 | |
| ISRO ISTRAC Scientific Assistant Mock Test 2026 | |
| ISRO ISTRAC Technician-B (Electronics Mechanic) Mock Test 2026 | |
| ISRO ISTRAC Technician-B (Carpenter) Mock Test 2026 | |
| ISRO ISTRAC Draughtsman-B (Civil) Mock Test 2026 | |
| ISRO ISTRAC Draughtsman-B (Mechanical) Mock Test 2026 | |
| ISRO ISTRAC Library Assistant-A Mock Test 2026 | |
| ISRO ISTRAC Cook-A Mock Test 2026 |
Prepare for Kerala PSC Technical Exams with Entri
സർക്കാർ ജോലി എന്ന സ്വപ്നം ഇനി സ്വപ്നം മാത്രമല്ല! Join Kerala's Top-rated PSC Coaching Programs
Join NowISRO ISTRAC 2026 Syllabus & Exam Pattern – Topics, Marks
Candidates can choose to attempt the Written Test/CBT in either Hindi or English. It is advisable to practice mock tests in the same language you plan to choose on the exam day to build familiarity with technical terminology.
ISRO ISTRAC Syllabus 2026 PDF Download
| Post Category | No. of Questions | Duration | Marking Scheme | Skill Test |
|---|---|---|---|---|
| Technical Assistant, Scientific Assistant, Library Assistant-A | 80 MCQs | 1.5 Hours | +1 / -0.33 | 100 Marks (Qualifying) |
| Technician-B, Draughtsman-B | 80 MCQs | 1.5 Hours | +1 / -0.33 | 100 Marks (Qualifying) |
| Cook-A | 60 MCQs | 1.5 Hours | +1 / -0.33 | 100 Marks (60 Required to Qualify) |
Pass Marks You Need to Target in ISRO ISTRAC Mock Test 2026
Before starting your mock test practice, it helps to know the actual cut-off you’re preparing for:
- Unreserved (UR) candidates: 32 out of 80 marks in the written test/CBT, and 50 out of 100 in the skill test
- Reserved category candidates (only where the post is reserved): 24 out of 80 marks in the written test/CBT, and 40 out of 100 in the skill test
- Cook-A candidates: 60 out of 100 marks required in the skill test, with no relaxation for any category
However, since shortlisting for the skill test happens in a 1:5 ratio (minimum 10 candidates) based on written test performance, simply clearing the minimum cut-off isn’t enough — candidates should aim to mock-test themselves toward the top percentile score, not just the passing mark, to secure a skill test call.
ISRO ISTRAC Mock Test 2026 – Subject-Wise Mock Test Strategy by Post
| Post | Mock Test Focus Areas |
|---|---|
| Technician-B (Electronics Mechanic & Carpenter)Draughtsman-B (Civil & Mechanical) | Since eligibility is based on ITI/NCVT trade certification, mock tests should primarily cover:
Trade Theory Workshop Calculation & Science Engineering Drawing Basics Safety Practices relevant to the respective trade (Electronics Mechanic, Carpenter, Draughtsman Civil, or Draughtsman Mechanical) General Awareness• Basic Numerical Ability & Reasoning commonly asked in ITI-level competitive exams |
| Technical Assistant (Electronics & Mechanical) | Since the post requires a First Class Diploma in the respective discipline, mock tests should focus on diploma-level technical subjects
Electronics Basic Electronics Communication Systems Digital Electronics Measurement Instruments Mechanical: Engineering Mechanics Thermodynamics• Engineering Materials Manufacturing Processes |
| Scientific Assistant (Computer Science & Mathematics) | Since eligibility requires a First Class B.Sc. in the relevant subject, mock tests should cover:
Computer Science: Programming Fundamentals Data Structures Computer Networks Operating Systems Database Management SystemsMathematics: Calculus• Algebra Statistics Numerical Methods |
| Library Assistant-A | Mock tests should include:
Library Classification Systems Cataloguing Rules Information Science Fundamentals Computer Literacy Basics These topics align with the educational qualification and the required computer literacy skill test. |
| Cook-A | While the written test focuses on General Knowledge and Basic Aptitude, preparation should also include practical skill development. Mock preparation should combine:
MCQ Practice Hands-on Cooking Practice Institutional/Canteen-scale Food Preparation Skills This aligns with the requirement of 5 years of professional cooking experience. |
How to Use ISRO ISTRAC 2026 Mock Tests on Entri App
- Download and install the Entri App, then sign in using your mobile number.
- Search for ISRO ISTRAC 2026 or navigate to the relevant exam category.
- Open the Practice section from the bottom menu.
- Select the ISRO ISTRAC Mock Test for your post.
- Choose the available mock test and tap Start Test.
- Attempt the test within the allotted time and submit your responses.
- Review your score, accuracy, and detailed performance analysis in the Analytics section.
- Reattempt mock tests regularly to improve speed, accuracy, and exam readiness before the actual examination.
Skill Test Preparation Alongside ISRO ISTRAC 2026 Mock Tests
It’s important to remember that clearing the written test/CBT mock benchmark is only half the journey — the skill test is purely go/no-go (pass/fail) in nature for most posts, and is conducted only in Bengaluru for shortlisted candidates. Alongside MCQ mock tests, candidates should also practice trade-specific practical skills (for Technician-B, Draughtsman-B), computer literacy tasks (for Library Assistant-A and technical posts), and job-relevant practical demonstrations (for Cook-A) well in advance of the CBT results.
