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Government recruitment · space research scientist/engineer · ISRO

ISRO Scientist/Engineer (SC) Mock Tests, Syllabus & Complete Exam Guide

ISRO Recruitment for Scientist/Engineer 'SC' (Electronics, Mechanical, Computer Science & allied disciplines). Practise 35 full-length mock tests on the official pattern, drill every topic, and get the eligibility, syllabus, cut-off, rank and college details you need — all in one place.

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ISRO Scientist/Engineer (SC) at a glance

Sections
Discipline · Engg Maths · Aptitude · Science & Tech
Written test
Objective · representative 90 min pattern
Marking
+1 correct · 0 wrong (as modelled here)
Stages
Written test → Interview
ModeWritten test (objective) → Interview
FrequencyAs per ISRO vacancies (typically once a year)
LanguagesEnglish
By the ExamguruX Editorial TeamReviewed for pattern accuracy against ISROLast updated 2 September 2026

ISRO Scientist/Engineer (SC) full-length mock tests

Attempt 35 full-length ISRO Scientist/Engineer (SC) mock tests built on the official 52-question pattern. The first mock is free — every test comes with instant results and a step-by-step solution for each question.

ISRO Scientist/Engineer 'SC' Full Mock Test 01

Free
52 Qs · 52 marks90 min19.1K attemptsModerate
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ISRO Scientist/Engineer 'SC' Full Mock Test 02

52 Qs · 52 marks90 min23.1K attemptsHard
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ISRO Scientist/Engineer 'SC' Full Mock Test 03

52 Qs · 52 marks90 min27.2K attemptsModerate
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ISRO Scientist/Engineer 'SC' Full Mock Test 04

52 Qs · 52 marks90 min31.2K attemptsHard
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ISRO Scientist/Engineer 'SC' Full Mock Test 05

52 Qs · 52 marks90 min35.3K attemptsEasy
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ISRO Scientist/Engineer 'SC' Full Mock Test 06

52 Qs · 52 marks90 min39.3K attemptsHard
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ISRO Scientist/Engineer 'SC' Full Mock Test 07

52 Qs · 52 marks90 min43.4K attemptsEasy
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ISRO Scientist/Engineer 'SC' Full Mock Test 08

52 Qs · 52 marks90 min47.4K attemptsModerate
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ISRO Scientist/Engineer 'SC' Full Mock Test 09

52 Qs · 52 marks90 min51.5K attemptsEasy
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Unlock all ISRO Scientist/Engineer (SC) tests

Try the first full-length mock free. Get the complete ISRO Scientist/Engineer (SC) mock library, every topic test and all available languages for 3 months — a one-time ₹399 / 3 months.

ISRO Scientist/Engineer (SC) — full access

₹399/ 3 months
  • Every full-length mock test
  • All topic-wise tests, every subject
  • All available languages
  • Step-by-step solution for every question
  • Indicative marks-to-rank & cut-offs

Secure payment by Razorpay · one-time ₹399 for 3 months

ISRO Scientist/Engineer (SC) topic-wise tests & syllabus

120 topic tests across 4 subjects — a focused set of 15 tests for every topic in the ISRO Scientist/Engineer (SC) syllabus, tagged with approximate exam weightage so you practise where the marks are.

120 topic-wise tests · 15 per topic across 4 subjects. Pick a subject, expand a topic, and start drilling.

Thermodynamics & Fluid Mechanics — Test 01

12 Qs · 12 marks11 min124K attemptsModerate
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Thermodynamics & Fluid Mechanics — Test 02

12 Qs · 12 marks11 min153K attemptsEasy
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Thermodynamics & Fluid Mechanics — Test 03

20 Qs · 20 marks18 min181K attemptsHard
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Thermodynamics & Fluid Mechanics — Test 04

12 Qs · 12 marks11 min209K attemptsModerate
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Thermodynamics & Fluid Mechanics — Test 05

12 Qs · 12 marks11 min238K attemptsEasy
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Thermodynamics & Fluid Mechanics — Test 06

20 Qs · 20 marks18 min266K attemptsHard
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Thermodynamics & Fluid Mechanics — Test 07

12 Qs · 12 marks11 min295K attemptsModerate
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Thermodynamics & Fluid Mechanics — Test 08

12 Qs · 12 marks11 min22.9K attemptsEasy
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Thermodynamics & Fluid Mechanics — Test 09

20 Qs · 20 marks18 min51.2K attemptsHard
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Thermodynamics & Fluid Mechanics — Test 10

12 Qs · 12 marks11 min79.6K attemptsModerate
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Thermodynamics & Fluid Mechanics — Test 11

12 Qs · 12 marks11 min108K attemptsEasy
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Thermodynamics & Fluid Mechanics — Test 12

20 Qs · 20 marks18 min136K attemptsHard
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Thermodynamics & Fluid Mechanics — Test 13

12 Qs · 12 marks11 min165K attemptsModerate
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Thermodynamics & Fluid Mechanics — Test 14

12 Qs · 12 marks11 min193K attemptsEasy
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Thermodynamics & Fluid Mechanics — Test 15

20 Qs · 20 marks18 min221K attemptsHard
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ISRO Scientist/Engineer (SC) sample questions

A few real ISRO Scientist/Engineer (SC) questions with answers and step-by-step solutions, in the exact style of the full mock tests.

Core Engineering (Discipline)Sample 1

A heat engine operates between a source at 600 K and a sink at 300 K. What is the maximum (Carnot) efficiency it can achieve?

  • A.25%
  • B.50%
  • C.60%
  • D.75%

Solution: Carnot efficiency = 1 - Tsink/Tsource = 1 - 300/600 = 0.5, i.e. 50%.

Engineering MathematicsSample 2

The derivative of ln(x) with respect to x is:

  • A.1/x
  • B.x
  • C.ln x
  • D.e^x

Solution: d/dx(ln x) = 1/x.

Aptitude & ReasoningSample 3

In a written test of 200 marks, a candidate scores 65%. How many marks did the candidate get?

  • A.120
  • B.130
  • C.140
  • D.150

Solution: 65% of 200 = (65/100) x 200 = 130 marks.

General Science & TechnologySample 4

In ISRO's launch-vehicle fleet, PSLV stands for:

  • A.Polar Satellite Launch Vehicle
  • B.Payload Space Launch Vehicle
  • C.Primary Satellite Launch Vehicle
  • D.Planetary Satellite Launch Vehicle

Solution: PSLV is the Polar Satellite Launch Vehicle, ISRO's reliable workhorse rocket.

About the ISRO Scientist/Engineer (SC) exam

A national recruitment exam that selects Scientists/Engineers in the 'SC' grade for the Indian Space Research Organisation and its centres, hiring BE/BTech graduates into India's space programme across Electronics, Mechanical, Computer Science and allied engineering disciplines.

What is the ISRO Scientist/Engineer 'SC' exam?

The ISRO Scientist/Engineer 'SC' recruitment is the Indian Space Research Organisation's entry-level exam for hiring engineering graduates as Scientists/Engineers in the 'SC' grade. It brings BE/BTech graduates from disciplines such as Electronics, Mechanical and Computer Science into India's space programme, placing successful candidates at ISRO centres that build launch vehicles, satellites and ground systems. Because it offers a prestigious research career at Pay Level 10, it draws a very large number of applicants each cycle.

The selection has two parts: an objective written test in the candidate's engineering discipline, and an interview for those who clear the written stage. The written test focuses on core engineering fundamentals along with engineering mathematics, aptitude and general science and technology; final merit is decided by the interview among shortlisted candidates. Because the written paper is competitive and (in the actual exam) carries negative marking, accuracy on discipline fundamentals is what gets you shortlisted.

How to clear ISRO Scientist/Engineer 'SC'

The written test rewards strong command of undergraduate engineering fundamentals in your discipline — thermodynamics, circuits and Ohm's law, strength of materials, digital logic and control systems basics — so revise core theory until standard problems are quick and automatic. Engineering Mathematics (calculus, matrices, differential equations, probability and Laplace transforms) is high-return and stable across disciplines, so keep it sharp.

Aptitude and reasoning reward speed on percentages, ratios, time-speed-distance and logical puzzles, while General Science & Technology rewards awareness of India's space programme — launch vehicles such as PSLV and GSLV, cryogenic engines, satellites and orbits, and missions like Chandrayaan, Mangalyaan and Aditya-L1 — alongside general physics and chemistry. Because the real exam has negative marking, attempt with discipline, and take full-length timed mocks to build the pacing the paper demands before you sit the interview stage.

ISRO Scientist/Engineer (SC) eligibility & exam pattern

Check whether you meet the ISRO Scientist/Engineer (SC) eligibility criteria and understand exactly how the paper is structured and marked before you plan your preparation.

Eligibility criteria

Nationality
Indian citizen (with the usual provisions for certain other categories as specified by ISRO).
Qualification
BE/BTech or equivalent in the notified engineering discipline (e.g. Electronics, Mechanical, Computer Science) with the minimum aggregate marks specified in the notification.
Age
Generally up to 28 years as on the cut-off date, with age relaxation for reserved categories per government norms.
Academic performance
A minimum first-class (typically 65% or CGPA 6.84/10) in the qualifying degree is usually required.
Selection
Shortlisting through the written test followed by an interview; final merit is based on interview performance.
Attempts
No fixed limit on the number of attempts as long as you meet the age and eligibility criteria.

Exam pattern & marking

SubjectQuestionsMarks
Core Engineering (Discipline)Thermodynamics, Ohm's law, stress/strain, digital logic, control systems basicsDiscipline-basedMajor weight
Engineering MathematicsCalculus, matrices, differential equations, probability, LaplaceIncludedScoring
Aptitude & ReasoningQuantitative aptitude and logical reasoningIncludedScoring
General Science & TechnologySpace technology (PSLV/GSLV, cryogenic engines, satellites, Chandrayaan/Mangalyaan, remote sensing) plus general physics/chemistryIncludedScoring
TotalNaN100

The ISRO Scientist/Engineer 'SC' written test is an objective examination set in the candidate's engineering discipline, with the actual exam carrying negative marking for wrong answers. Candidates who clear the written test are shortlisted for an interview, and final selection is decided on interview performance among those shortlisted. The pattern presented on ExamguruX is representative: a 90-minute paper of 100 marks blending Core Engineering (discipline fundamentals), Engineering Mathematics, Aptitude & Reasoning and General Science & Technology with a space-technology flavour. On ExamguruX, each question is scored +1 for a correct answer with 0 for a wrong answer, and every question has a worked solution so you learn from each attempt.

Duration: 90 minutes (written test — representative).

How to prepare for ISRO Scientist/Engineer (SC)

A fresher-friendly ISRO Scientist/Engineer (SC) roadmap — understand the paper first, follow a month-by-month plan, build a weekly routine and peak with reviewed full-length mocks.

Beginner-friendly roadmap

Your ISRO Scientist/Engineer (SC) plan: first day to exam day

Start with the paper structure, build concepts in layers, then use timed practice and review to turn preparation into a repeatable score.

Coverage4 subjects
Exam clock90 minutes (written test — representative)
MarkingThe ISRO Scientist/Engineer 'SC' written test is an objective examination set in the candidate's engineering discipline, with the actual exam carrying negative marking for wrong answers. Candidates who clear the written test are shortlisted for an interview, and final selection is decided on interview performance among those shortlisted. The pattern presented on ExamguruX is representative: a 90-minute paper of 100 marks blending Core Engineering (discipline fundamentals), Engineering Mathematics, Aptitude & Reasoning and General Science & Technology with a space-technology flavour. On ExamguruX, each question is scored +1 for a correct answer with 0 for a wrong answer, and every question has a worked solution so you learn from each attempt.

The first 12 weeks

A plan a fresher can actually follow

  1. Month 1

    Understand the paper and build your base

    Read the official pattern first, then make a realistic subject map for 4 subjects. Begin with Core Engineering (Discipline), Engineering Mathematics, Aptitude & Reasoning. Focus on concepts before speed.

    Take one diagnostic topic test. Its purpose is to find gaps, not to judge your score.
  2. Month 2

    Finish the core syllabus through practice

    Cover the remaining syllabus, including General Science & Technology, while revising Month 1 every week. Move from untimed questions to short timed sets.

    Keep a single error log: concept missed, why it happened and the correct method.
  3. Month 3

    Build exam temperament with mocks

    Use the real exam time limit (90 minutes (written test — representative)) in full-length practice. Review every mock longer than it took to attempt it; the review is where improvement happens.

    Turn each weak area from your error log into a 30–45 minute repair session.

Your repeatable week

The study loop that makes revision stick

  1. 1
    Learn

    Read one focused concept block and make a short revision sheet.

  2. 2
    Solve

    Immediately answer topic questions; do not wait until you have ‘finished’ the syllabus.

  3. 3
    Review

    Log mistakes by concept, not just by score. Revisit them after 2–3 days.

  4. 4
    Simulate

    Use a timed section or mock to practise decisions under the clock.

Mock-test ladder

Don’t start with a full mock every day

  • Month 1: topic tests after each completed concept.
  • Month 2: one timed sectional test each week, plus error-log revision.
  • Month 3: one or two full mocks weekly under the real 90 minutes (written test — representative) clock.

ISRO Scientist/Engineer (SC)-specific priorities

What to focus on as you move through the plan

  1. 1

    Master your discipline fundamentals

    Core Engineering carries the most weight. Drill thermodynamics, Ohm's law and circuits, stress/strain, digital logic and control-systems basics until standard problems are fast and automatic.

  2. 2

    Keep Engineering Mathematics sharp

    Calculus, matrices, differential equations, probability and Laplace transforms are stable, high-return topics across disciplines. Revise formulae and practise standard problems regularly.

  3. 3

    Build speed in Aptitude & Reasoning

    Practise percentage, ratio, time-speed-distance, averages, number series and logical puzzles so you can secure quick, accurate marks under time pressure.

  4. 4

    Follow India's space programme

    General Science & Technology rewards awareness of PSLV/GSLV, cryogenic engines, satellites and orbits, and missions like Chandrayaan, Mangalyaan, NavIC and Aditya-L1, plus general physics and chemistry.

  5. 5

    Respect the negative marking

    The actual written test penalises wrong answers, so avoid blind guessing. Attempt when you can eliminate to a confident choice and leave questions you genuinely can't judge.

  6. 6

    Prepare for the interview early

    The written test only shortlists you; final merit is the interview. Revise your discipline in depth and be ready to discuss projects, fundamentals and your interest in space technology.

Final 7 days

Revise your short notes and error log; do not begin major new topics.

Take only the number of mocks you can properly review; protect sleep and routine.

Confirm the official admit-card instructions, reporting time, centre and permitted items.

Want personal support?

Request an online trainer for your ISRO Scientist/Engineer (SC) preparation.

Get help with your study plan, difficult concepts and mock-test review, subject to trainer availability.

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ISRO 'SC' scoring & selection

Use this practice benchmark to understand score ranges, qualifying cut-offs and the selection stages for ISRO Scientist/Engineer (SC). The conducting authority sets official merit and appointments.

ISRO Scientist/Engineer (SC) marks vs. rank

Score rangeStageWhat it takes
Written: high accuracyWrittenClear the cutoff comfortably to be shortlisted for interview
Discipline strengthCoreCommand of core engineering fundamentals is decisive
Interview performanceInterviewFinal merit is decided by the interview
Balanced sectionsOverallNo weak section; Maths + Aptitude carry reliable marks
Steady mock scoresReadinessConsistent timed-mock performance predicts shortlisting

Indicative stage requirements

Written test (shortlisting)Decisive

Indicative marks: Clears you into the interview stage

InterviewFinal merit

Indicative marks: Final selection is based on interview performance

First-class degreeQualifying

Indicative marks: Typically 65% or CGPA 6.84/10 in the qualifying degree

Reserved categoriesRelaxed

Indicative marks: Age and eligibility relaxations per government norms

Centre allotmentNeed-based

Indicative marks: Depends on discipline, merit and vacancies

The ISRO Scientist/Engineer 'SC' pattern here — a two-stage written-test-plus-interview process and a representative 90-minute, 100-mark objective paper across Core Engineering, Engineering Mathematics, Aptitude & Reasoning and General Science & Technology, scored +1/0 on ExamguruX — is a representative model for practice, not the official blueprint. Exact vacancies, disciplines, marks, negative-marking scheme, dates, pay and postings change each recruitment cycle; always confirm current specifics in the official ISRO notification at isro.gov.in.

Career outcomes through ISRO Scientist/Engineer 'SC'

ISRO recruits Scientists/Engineers in the 'SC' grade into centres and units spread across the country; where you are posted depends on your discipline, merit, vacancies and organisational need. The guide below shows the kind of posts, pay and centres associated with this recruitment — actual vacancies and postings change with every recruitment cycle.

Centre / UnitLocationRoleIndicative requirement
Vikram Sarabhai Space Centre (VSSC)ThiruvananthapuramScientist/Engineer 'SC' · Pay Level 10Merit & vacancy based
Space Applications Centre (SAC)AhmedabadScientist/Engineer 'SC' · Pay Level 10Merit & vacancy based
U R Rao Satellite Centre (URSC)BengaluruScientist/Engineer 'SC' · Pay Level 10Merit & vacancy based
Liquid Propulsion Systems Centre (LPSC)Valiamala / BengaluruScientist/Engineer 'SC' · Pay Level 10Merit & vacancy based
Satish Dhawan Space Centre (SDSC SHAR)SriharikotaScientist/Engineer 'SC' · Pay Level 10Merit & vacancy based
ISRO Telemetry, Tracking & Command Network (ISTRAC)BengaluruScientist/Engineer 'SC' · Pay Level 10Merit & vacancy based
National Remote Sensing Centre (NRSC)HyderabadScientist/Engineer 'SC' · Pay Level 10Merit & vacancy based
ISRO Headquarters / UnitsBengaluruScientist/Engineer 'SC' · Pay Level 10Merit & vacancy based

A representative view of centres and selection routes linked to ISRO Scientist/Engineer (SC). Confirm vacancies, stages and final appointments in the current official notice.

ISRO Scientist/Engineer (SC) important dates

The typical ISRO Scientist/Engineer (SC) recruitment timeline, from notification to result and document verification. Dates are tentative until the official notice is released.

  1. Notification & apply

    As per ISRO vacancies (varies by cycle)

  2. Written test

    Typically a few weeks after applications close

  3. Written result / shortlist

    A few weeks after the exam

  4. Interview

    Usually a couple of months after the written result

  5. Final result

    After interviews and document verification

  6. Joining

    As per ISRO's requirement and offer

ISRO Scientist/Engineer (SC) — frequently asked questions

Quick, reliable answers to the questions ISRO Scientist/Engineer (SC) aspirants ask most.

What is the ISRO Scientist/Engineer 'SC' selection process?

Two stages: an objective written test in your engineering discipline, followed by an interview for shortlisted candidates. Final selection is based on interview performance among those who clear the written test.

What is the ISRO 'SC' exam pattern?

The written test is objective and discipline-based, with negative marking in the actual exam. The pattern modelled here is representative: a 90-minute, 100-mark paper blending Core Engineering (discipline), Engineering Mathematics, Aptitude & Reasoning and General Science & Technology.

Is there negative marking in the ISRO 'SC' written test?

Yes, the actual written test penalises wrong answers, so blind guessing is costly. On ExamguruX the mocks are scored +1 for a correct answer and 0 for a wrong answer, with a worked solution for every question.

What is the eligibility for ISRO Scientist/Engineer 'SC'?

You typically need a BE/BTech (or equivalent) in the notified discipline with a first-class aggregate (usually 65% or CGPA 6.84/10) and to be within the age limit (generally up to 28 years, with relaxations for reserved categories).

Which centres recruit through ISRO 'SC'?

ISRO centres and units such as VSSC (Thiruvananthapuram), SAC (Ahmedabad), URSC (Bengaluru), LPSC, SDSC SHAR (Sriharikota), ISTRAC and NRSC. Posting depends on your discipline, merit and vacancies, at Pay Level 10.

How should I use these mock tests?

Take full-length timed mocks to build speed and section balance across discipline fundamentals, engineering maths, aptitude and science & technology, and review the solution for every question. Use the topic tests to drill each section until it becomes a reliable source of marks before the interview stage.

Start your ISRO Scientist/Engineer (SC) preparation today

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Devaseelan

Devaseelan

Cleared NEET