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Question Set 84
1.Which reactor has no moderator ? Ans: Fast breeder reactor. 2.What are thermal neutrons ? Ans: Thermal neutrons are slow…
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Question Set 83
1.How you can define coal ? Ans: Coal is a naturally occurring hydrocarbon that consists of the fossilised remains of…
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Question Set 82
1.Why rockets using liquid hydrogen have higher specific impulse compared to liquid hydrocarbon ? Ans: Liquid hydrogen has higher burning…
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Question Set 81
1.Why pistons are usually dished at top ? Ans: Pistons are usually hollowed at top to (i) provide greater spa’e…
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Question Set 80
1.Maximum combustion temperature in gas turbines is of the order of 1100 to 10°C whereas same is around 00°C in…
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Question Set 79
1.Which two elements in feed water can cause corrosion of tubes and plates in boiler ? Ans: Acid and oxygen…
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Question Set 78
1.When maximum discharge is obtained in nozzle ? Ans: At the critical pressure ratio. 2.Under what condition the work done…
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Question Set 77
1.What is the difference between scavenging and supercharging ? Ans: Scavenging is process of flushing out burnt gases from engine…
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Question Set 76
1.What is the need of high compression ratio? Today every machine is expected to give higher efficiency. When we talk…
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Question Set 75
1. What causes white smoke in two stroke locomotive engines? That is the engine running too lean (lack of fuel).…
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Question Set 74
1. How pipe flanges are electrically insulated? Pipe flanges are protected from corrosion by means of electrolysis, with dielectric flanges.…
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Question Set 73
1. What is annealing? It is a process of heating a material above the re-crystallization temperature and cooling after a…