ISRO Scientist/Engineer — SC (CS/ECE/Mechanical) — Free Online Mock Test
ICRB · 80 Q in 90m. Discipline-specific (no GA section). +3/-1. Cut-off typically very high. · Official language: English & Hindi.
ISRO Scientist/Engineer exam at a glance
ISRO Scientist/Engineer full-length mock tests
Attempt 50 full-length ISRO Scientist/Engineer mock tests, each a distinct question set built on the real 80-question, 90-minute pattern — with instant scoring and section-wise analysis. The first 3 are free.
ISRO Scientist/Engineer key facts & eligibility
| Conducting body | Indian Space Research Organisation (ISRO), through the ISRO Centralised Recruitment Board (ICRB) |
|---|---|
| Official website | isro.gov.in ↗ |
| Mode | Recruitment for the entry-level Scientist/Engineer ‘SC’ post. Selection is by a written test (a computer-based objective paper of engineering and aptitude questions) followed by an interview for shortlisted candidates; the final merit is based on the written test and interview. |
| Frequency | As and when vacancies arise — ISRO/ICRB issues a notification for each recruitment cycle; there is no fixed annual date. |
| Scoring & marking | The written test is objective with negative marking; core-engineering questions carry the dominant weight, and shortlisted candidates proceed to an interview that, with the written score, decides the final merit. The exact pattern is set in each notification. |
| Language | English. |
Who is eligible for ISRO Scientist/Engineer?
A B.E./B.Tech (or equivalent) in the relevant engineering discipline with a strong first class (commonly a minimum aggregate around 65% or CGPA about 6.84/10), within the prescribed age limit (broadly up to 28 years for the general category, with category relaxations).
Last verified July 2026 against ISRO — Careers. Always confirm current details on the official website before you register.
ISRO Scientist/Engineer section breakdown
The ISRO Scientist/Engineer mock test on Wrexa Edge replicates the real exam's section structure — same names, same question count per section, same time limits. No inter-section breaks — the timer runs continuously.
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ISRO SC (80 Q)
ISRO Scientist/Engineer scoring & marking scheme
Strategy: ISRO Scientist/Engineer penalises wrong answers (-1 per mistake). Skip a question if you cannot eliminate at least 2 options — guessing blindly hurts your scaled score more than blanking.
Scale: ISRO Scientist (out of 240).
How ISRO Scientist/Engineer is conducted
- Mode
- Test format
- Backtracking
- Mark for review
ISRO Scientist/Engineer time strategy
With 80 questions in 90 minutes, you have about 68 seconds per question on average. Successful candidates aim for the following pacing on each section:
- ISRO SC (80 Q)
Wrexa Edge's analytics show your actual time-per-question after every mock so you can spot which sections you're losing time on.
ISRO Scientist/Engineer topics covered
Across the 50 Wrexa Edge variants of ISRO Scientist/Engineer, the following topics appear most often (sample distribution from one variant):
ISRO SC (80 Q)
- Physics — Energy · 4
- Physics — Circular Motion · 4
- Physics — Mechanics · 4
- Physics — Electricity · 3
- Physics — Waves · 3
- Statics — Beams · 2
- MoM — Material Properties · 2
- Physics — Electromagnetism · 2
ISRO Scientist/Engineer difficulty calibration
Elite tier. Elite-tier: among the toughest exams in its category. Most successful candidates prepare for 6-12+ months.
ICRB · 80 Q in 90m. Discipline-specific (no GA section). +3/-1. Cut-off typically very high. · Official language: English & Hindi.
Verified content — Wrexa Edge's ISRO Scientist/Engineer bank has been deeply curated with real exam-aligned content (estimated 100% syllabus coverage).
How Wrexa Edge prepares you for ISRO Scientist/Engineer
- Real test-day interface
- 50 distinct variants
- Detailed analytics
- Spaced repetition (Notebook)
- Optional proctoring
- Free to start
Expert take: what ISRO Scientist/Engineer really tests
ISRO Scientist/Engineer ‘SC’ recruitment is notification-based, with an objective written test dominated by core-engineering fundamentals for your discipline, then an interview — the two together setting the final merit. It is highly competitive against a tight age limit and strong marks requirement.
Preparation tips
- Build GATE-level core-engineering fundamentals — they carry the written test.
- Practise previous ISRO papers to learn the objective style and recurring topics.
- Manage the negative marking with accuracy, and prepare your projects for the interview.
Common mistakes to avoid
- Studying broadly without prioritising the high-weight core subjects for your branch.
- Ignoring interview preparation, which is half the final merit for shortlisted candidates.
ISRO Scientist/Engineer study plan
A phase-by-phase roadmap from your first concept to test-ready. Stretch or compress each phase to fit the time you have before your attempt.
- Build GATE-level fundamentals in your engineering discipline
- Prioritise high-weight core subjects (they dominate the written test)
- Start objective question practice with negative marking
- Drill previous ISRO papers to learn the objective style
- Improve accuracy to manage the negative marking
- Track and fix weak core topics
- Sit full timed mocks matched to the notification pattern
- Begin interview preparation (projects, fundamentals, ISRO awareness)
- Revise high-yield core topics
Where ISRO Scientist/Engineer can take you
A strong ISRO Scientist/Engineer result opens up these careers and higher-study paths:
- Scientist/Engineer at ISRO
- Space & defence R&D
- Prestigious public-sector role
- Discipline-aligned work
Best books & official prep for ISRO Scientist/Engineer
- Standard GATE-level textbooks for your discipline — Various
- ISRO Scientist/Engineer previous papers — Various
Official practice: Always work from the specific ICRB notification on isro.gov.in for the exact pattern and syllabus; build strong core-engineering fundamentals for your discipline, as they dominate the written test.
Previous-year papers: Previous ISRO Scientist/Engineer objective papers are widely available and closely reflect the exam.
Frequently asked questions
- What is the ISRO Scientist/Engineer exam pattern?
- ISRO Scientist/Engineer — SC (CS/ECE/Mechanical) contains 80 questions across 1 section: ISRO SC (80 Q). Total duration is 90 minutes (about 68 seconds per question).
- Does ISRO Scientist/Engineer have negative marking?
- Yes — ISRO Scientist/Engineer carries negative marking of -1 per wrong answer and 3 per correct answer. Skipping is safer than guessing blindly.
- How is ISRO Scientist/Engineer scored?
- Scaled score range: 0 to 240. ISRO Scientist (out of 240).
- How can I practise ISRO Scientist/Engineer online for free?
- Wrexa Edge gives you 3 free full-length ISRO Scientist/Engineer mock tests — with instant scoring, detailed explanations and analytics — plus 47 more with Pro. Start practising in under a minute, no card required.
- What is the difficulty level of ISRO Scientist/Engineer?
- ISRO Scientist/Engineer is rated Elite difficulty on Wrexa Edge. Elite-tier: among the toughest exams in its category. Most successful candidates prepare for 6-12+ months. ICRB · 80 Q in 90m. Discipline-specific (no GA section). +3/-1. Cut-off typically very high. · Official language: English & Hindi.
- How long is the ISRO Scientist/Engineer exam?
- ISRO Scientist/Engineer runs for 90 minutes total. On Wrexa Edge the timer is enforced exactly as on the real exam — including no inter-section breaks.
- What topics are covered in ISRO Scientist/Engineer?
- ISRO Scientist/Engineer is split into: ISRO SC (80 Q). Each section is timed and weighted separately. ICRB · 80 Q in 90m. Discipline-specific (no GA section). +3/-1. Cut-off typically very high. · Official language: English & Hindi.
- What tools or aids are allowed during ISRO Scientist/Engineer?
- No special tools are required.
- Is the ISRO Scientist/Engineer test adaptive?
- No — ISRO Scientist/Engineer is a fixed-form (linear) test. Every candidate sees the same number of questions per section.
- How many ISRO Scientist/Engineer mock tests does Wrexa Edge offer?
- Wrexa Edge generates 50 distinct ISRO Scientist/Engineer variants — each with different question content, not just shuffled options — the first 3 free for everyone and 47 more with Pro. That's 4000 unique practice questions in the real test-day interface.
- Is there a free ISRO Scientist/Engineer test series 2026?
- Yes. The Wrexa Edge ISRO Scientist/Engineer test series for 2026 gives you 3 free full-length mock tests (50 in total) plus subject-wise and topic-wise tests — instant scoring and detailed analysis, no card required.
- Are ISRO Scientist/Engineer previous year question–style papers included?
- Every ISRO Scientist/Engineer mock is modelled on the official exam pattern and the style of previous years' papers — the same 80-question structure, sections and marking — so your practice mirrors the real paper you'll sit.
- Which is the best free ISRO Scientist/Engineer mock test online?
- Wrexa Edge's ISRO Scientist/Engineer mock test replicates the real exam interface, timing and negative marking, with instant score, section-wise analysis and 50 fresh variants — a strong free choice for 2026 preparation.
- Can I take the ISRO Scientist/Engineer mock test on mobile?
- Yes. ISRO Scientist/Engineer mock tests run in any browser on mobile, tablet or desktop — no app or download needed. Start on your phone and your progress and analytics sync when you sign in.
- What is the ISRO Scientist/Engineer syllabus?
- The ISRO Scientist/Engineer syllabus maps to its 1 section: ISRO SC (80 Q). Wrexa Edge's mock tests cover the complete syllabus topic by topic — see the topics-covered breakdown above — so you practise every area at real exam difficulty.
- What is the eligibility for ISRO Scientist/Engineer?
- A B.E./B.Tech (or equivalent) in the relevant engineering discipline with a strong first class (commonly a minimum aggregate around 65% or CGPA about 6.84/10), within the prescribed age limit (broadly up to 28 years for the general category, with category relaxations). Wrexa Edge focuses on realistic ISRO Scientist/Engineer practice: 3 free full-length mocks in the exact exam pattern, ready whenever you are.
- When is the ISRO Scientist/Engineer exam and how should I prepare?
- Official ISRO Scientist/Engineer exam dates are announced by the conducting body for each cycle — check the latest notification for the current schedule. To be ready, follow a phased study plan and take full-length timed mocks; Wrexa Edge gives you 3 free ISRO Scientist/Engineer mocks with instant scoring so you can track your readiness week by week.
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