utilises fast neutrons for causing fission.
converts fertile material (e.g., U-238) into fissile material (Pu-239).
normally employs molten sodium as coolant.
all (a), (b) and (c).
✅ The correct answer is option D.
Engineering
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3442. Nuclides having the same atomic numbers are termed as
isotopes
isomers
isotones
isobars
✅ The correct answer is option B.
3443. Fusion point of a basic refractory material is
reduced by the addition of acid oxides.
increased by the addition of acid oxides.
not affected by the addition of acid oxides.
always less than 1000°C.
✅ The correct answer is option A.
3444. The largest stable nucleus is
U-235
U-238
Pb-206
Bi-209
✅ The correct answer is option A.
3445. The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?
159
1837
2537
10000
✅ The correct answer is option B.
3446. The radioisotope used to study the thyroid gland is
iodine
cobalt
iron
carbon
✅ The correct answer is option A.
3447. Yield of pitch from distillation of high temperature tar is around __________ percent.
10
25
65
90
✅ The correct answer is option C.
3448. Which of the following has the highest flame speed?
CO
H₂
CH₄
C₂H₆
✅ The correct answer is option B.
3449. Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its
Emissivity factor is higher
Sulphur content is lower
Flue gas has lower dew point thereby facilitating more waste heat recovery
All of the above
✅ The correct answer is option D.
3450. Natural draught produced by a chimney depends upon the
Density of the chimney gases
Height of the chimney
Both A & B
Neither A nor B
✅ The correct answer is option C.