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- Question
A nuclear reactor is said to have become 'critical' when
Options- A. it stops due to malfunctioning
- B. it starts emitting dangerous radioactive radiations
- C. it is shut down to avoid explosion
- D. it is ready to produce controlled energy
- Correct Answer
- it is ready to produce controlled energy
ExplanationTo produce controlled energy i.e energy at a controlled or steady rate, the number of fissions per second must be controlled and maintained at that rate. Excess neutrons should be absorbed by control roads like cadmium.
- 1. The obscuring of one celestial body by another, particularly that of the sun or a planetary satellite
Options- A. elliptic
- B. ecliptic
- C. eclipse
- D. None of the above Discuss
- 2. First Indian to make a speech in Hindi before the UN General Assembly is
Options- A. Moraji Desai
- B. A.B. Vajpayee
- C. Lal Bahadur Shastri
- D. Lal Krishna Advani Discuss
- 3. Ben kingsley is associated with which of the following fields?
Options- A. Politics
- B. Social Service
- C. Sports
- D. Motion Pictures Discuss
- 4. The main aim of SAARC is
Options- A. Regional Cooperation
- B. Internal affairs
- C. Non-alignity
- D. Peaceful Coexistence Discuss
- 5. Who has scored the most runs in a single First-class innings?
Options- A. Hanif Mohammad
- B. Brian Lara
- C. Sir Donald Bradman
- D. Sachin Tendulkar Discuss
- 6. Which of the following is used as the logo of the World Wide Fund for Nature (WWF)?
Options- A. Deer
- B. Panda
- C. Camel
- D. Lion Discuss
- 7. Which of the following is not a chief organ of the United Nations Organisations?
Options- A. International Labour Organisation
- B. Security Council
- C. International Court of Justice
- D. General Assembly Discuss
- 8. Stars which appear single to the naked eye but are double when seen through a telescope are
Options- A. novas and supernovas
- B. binaries
- C. asteroids
- D. quasars Discuss
- 9. Pick out the scalar quantity
Options- A. force
- B. pressure
- C. velocity
- D. acceleration Discuss
- 10. The main crops of kharif are
Options- A. rice, jowar, bajra
- B. ragi, maize
- C. cotton, jute
- D. All of the above Discuss
More questions
Correct Answer: eclipse
Correct Answer: A.B. Vajpayee
Correct Answer: Motion Pictures
Correct Answer: Regional Cooperation
Correct Answer: Brian Lara
Correct Answer: Panda
Correct Answer: International Labour Organisation
Correct Answer: binaries
Correct Answer: pressure
Correct Answer: All of the above
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