Baroda
Ramagundam
Talcher
Tuticorin
✅ The correct answer is option B.
Engineering
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3502. Which of the following is the most harmful for the human being ?
β-rays
X-rays
γ-rays
ultra violet rays
✅ The correct answer is option C.
3503. Thorium-232 (a fertile material) on absorption of a neutron gets converted into __________ , which is a fissile material.
thorium-233
uranium-235
uranium-233
plutonium-239
✅ The correct answer is option C.
3504. Heavy water (D2O) in a nuclear reactor serves as a
coolant
moderator
both (a) & (b)
neutron absorber
✅ The correct answer is option C.
3505. Fast breeder test reactor at Kalpakkam is designed for using
thorium as a fertile material.
U-238 as a fertile material.
helium as a coolant.
uranium ore directly as a fuel.
✅ The correct answer is option A.
3506. Which of the following isotopes is not present in natural uranium ?
U-238
U-234
U-235
U-232
✅ The correct answer is option D.
3507. Which of the following may not need a moderator ?
Candu reactor
Fast breeder reactor
Homogeneous reactor
Pressurised water reactor
✅ The correct answer is option B.
3508. A pressurised water reactor (PWR) uses pressurised water as a
coolant.
working fluid in power turbine.
moderator.
none of these.
✅ The correct answer is option A.
3509. The half life period of a radiactive element is 100 days. After 400 days, one gm of the element will be reduced to __________ gm.
1-Apr
1-Aug
1-Feb
Jan-16
✅ The correct answer is option D.
3510. Enriched uranium means that, it contains
more than 0.71% of U-235.
only fertile material.
only fissile material.
no impurities.
✅ The correct answer is option A.