Nuclear Power — Set 5
Technology · परमाणु ऊर्जा · Questions 41–50 of 50
Which country built the first nuclear-powered submarine, the USS Nautilus?
Correct Answer: B. USA
• **USA** = forms the core principle. • **1954** — represents key evidence. • 💡 Wrong-option analysis: A: Soviet Union; B: United Kingdom; C: France.
Which radioactive isotope is used to determine the functionality of the human thyroid gland?
Correct Answer: B. Iodine-131
• **Iodine-131** = forms the core principle. • **131** — represents key evidence. • 💡 Wrong-option analysis: A: Cobalt-60; B: Carbon-14; C: Phosphorus-32.
What is the primary function of heavy water in a CANDU or PHWR reactor?
Correct Answer: A. As a moderator
• **As a moderator** = forms the core principle. • **Primary mechanism** — scientifically validated. • 💡 Wrong-option analysis: A: As a lubricant; B: As a shield against light; C: As a fuel.
What is the term for a nuclear reaction where energy is released by combining hydrogen isotopes to form helium?
Correct Answer: B. Fusion
• **Fusion** = forms the core principle. • **Primary mechanism** — scientifically validated. • 💡 Wrong-option analysis: A: Fission; B: Evaporation; C: Condensation.
Which material is used to wrap fuel pellets into long 'fuel rods' in a reactor core?
Correct Answer: B. Zircaloy (Zirconium alloy)
• **Zircaloy (Zirconium alloy)** = forms the core principle. • **Primary mechanism** — scientifically validated. • 💡 Wrong-option analysis: A: Steel; B: Plastic; C: Aluminum.
Which organization in India is responsible for operating all commercial nuclear power plants?
Correct Answer: C. NPCIL
• **NPCIL** = forms the core principle. • **Primary mechanism** — scientifically validated. • 💡 Wrong-option analysis: A: ISRO; B: DRDO; C: BARC.
What is the name of India's first indigenous nuclear research reactor established at Trombay?
Correct Answer: B. Apsara
• **Apsara** = forms the core principle. • **1956** — represents key evidence. • 💡 Wrong-option analysis: A: Cirus; B: Dhruva; C: Purnima.
Which radioactive particle consists of two protons and two neutrons, identical to a helium nucleus?
Correct Answer: B. Alpha particle
• **Alpha particle** = forms the core principle. • **Primary mechanism** — scientifically validated. • 💡 Wrong-option analysis: A: Beta particle; B: Gamma ray; C: Neutrino.
Which isotope of Thorium is found in nature and can be used to breed fuel for nuclear reactors?
Correct Answer: B. Thorium-232
• **Thorium-232** = forms the core principle. • **232** — represents key evidence. • 💡 Wrong-option analysis: A: Thorium-230; B: Thorium-228; C: Thorium-234.
What happens in a 'Meltdown' at a nuclear power plant?
Correct Answer: A. The fuel rods melt due to overheating
• **The fuel rods melt due to over** = forms the core principle. • **Primary mechanism** — scientifically validated. • 💡 Wrong-option analysis: A: The building melts in the sun; B: The power lines melt; C: The staff leaves the building.