Question Set 64
1. How the analyses and calorific values of fuels can be reported ? Ans: It may be reported as (a) as received or fired (wet) basis (b ) dry or moisture free…
Question Set 63
1. Which reactor has no moderator ? Ans: Fast breeder reactor. 2. What are thermal neutrons ? Ans: Thermal neutrons are slow neutrons (having energy below 1 eV) which are in thermal equilibrium with…
Question Set 62
1. How you can define coal ? Ans: Coal is a naturally occurring hydrocarbon that consists of the fossilised remains of buried plant debris that have undergone progressive physical and chemical alteration,…
Question Set 61
1. Why rockets using liquid hydrogen have higher specific impulse compared to liquid hydrocarbon ? Ans: Liquid hydrogen has higher burning velocity. 2. Why axial flow compressor is preferred for gas turbines for…
Question Set 60
1. Why pistons are usually dished at top ? Ans: Pistons are usually hollowed at top to (i) provide greater space for combustion, (ii) increase surface for flue gases to act upon,…
Question Set 59
1. Maximum combustion temperature in gas turbines is of the order of 1100 to 10°C whereas same is around 00°C in I.C. engine ? Why ? Ans: High temperature in I.C. engine…
Question Set 58
1.Which two elements in feed water can cause corrosion of tubes and plates in boiler? Ans: Acid and oxygen in feed water lead to corrosion. 2. What should be done to prevent…
Question Set 57
1. When maximum discharge is obtained in nozzle ? Ans: At the critical pressure ratio. 2. Under what condition the work done in reciprocating compressor will be least ? Ans: It is least when…
Question Set 56
1. What is the difference between scavenging and supercharging ? Ans: Scavenging is process of flushing out burnt gases from engine cylinder by introducing fresh air in the cylinder before exhaust stroke…
Question Set 55
Question No. 1 What maybe the possible causes for the safety trip to trip at normal speed? Answer: 1. Excessive vibration. 2. Leakage in the pilot valve. 3. Deposition of dirt in the…
