241. The predominent isotope of the naturally occuring element is
[A]. U235
[B]. U238
[C]. Pu233
[D]. Pu239
✅ The correct answer is option B.
IC Engines and Nuclear Power Plants MCQs
242. The thermal efficiency of diesel engines is about
[A]. 15%
[B]. 30%
[C]. 50%
[D]. 70%
✅ The correct answer is option D.
243. In a four stroke cycle petrol engine, the charge is compressed when both the valves (i.e. inlet valve and exit valve) are closed,
[A]. Agree
[B]. Disagree
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✅ The correct answer is option A.
244. U233 is produced
[A]. artificially
[B]. as basic raw material
[C]. when thorium is irradiated by neutrons
[D]. by fission of U238
✅ The correct answer is option C.
245. The object of supercharging the engine is
[A]. to reduce mass ofthe engine per brake power
[B]. to reduce space occupied by the engine
[C]. to increase the power output of an engine when greater power is required
[D]. all ofthe above
✅ The correct answer is option D.