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Question 1
Which particle has the highest ionising power per unit path length among the common types of nuclear radiation?
Correct Answer:
Alpha particle
Question 2
In a nuclear fission chain reaction in a thermal reactor, which material most commonly serves as the moderator?
Correct Answer:
Heavy water or light water
Question 3
The SI unit of radioactivity (activity) is:
Correct Answer:
Becquerel (Bq)
Question 4
India's indigenous Pressurised Heavy Water Reactors (PHWRs) use which combination of fuel and moderator/coolant?
Correct Answer:
Natural uranium fuel with heavy water moderator and coolant
Question 5
What is the primary purpose of control rods in a thermal nuclear reactor?
Correct Answer:
Absorb excess neutrons to regulate or shut down the chain reaction
Question 1
Exam overview

About this Exam

Prepare with the BARC OCES DGFS Practice Questions - BARC Scientific Officer (OCES DGFS) Online Screening Examination Exam practice quiz. This question bank includes 100 questions covering nuclear, number, unit, reactor, and radiation. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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BARC OCES DGFS Practice Questions - BARC Scientific Officer (OCES DGFS) Online Screening Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on nuclear, number, unit, reactor, and radiation. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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