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You Are On Multi Choice Question Bank SET 1507

75351. A machine which violates the first law of thermodynamics is known as perpetual motion machine of the second kind.



75352. Both the Ericsson and Joule's cycle have two constant pressure processes.



75353. The general law for the expansion or compression of gases, is





75354. The heat energy stored in the gas and used for raising the temperature of the gas is known as





75355. A cycle consisting of two constant pressure and two isentropic processes is known as





75356. When the gas is heated at constant pressure, the heat supplied





75357. The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.


75358. A closed cycle gas turbine works on Joule's cycle.



75359. The workdone in a free expansion process is zero.



75360. When a system changes its state from one equilibrium state to another equilibrium state, then the path of successive states through which the system has passed, is known as





75361. The fuel mostly used in blast furnace for extracting pig iron from iron ores is





75362. The ultimate analysis of coal consists of the determination of the percentage of





75363. The change of entropy, when heat is removed from the gas, is positive.



75364. The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is





75365. First law of thermodynamics deals with





75366. In S. I. units, the value of the universal gas constant is





75367. The throttling process is __________ process.




75368. A cycle consisting of two constant pressure and two isothermal processes is known as Ericsson cycle.



75369. A process of heating crude oil to a high temperature under a very high pressure to increase the yield of lighter distillates, is known as





75370. If in the equation pvn = C, the value of n = 1, then the process is called isothermal process.



75371. The specific volume of a system is an __________ property.



75372. Which of the following process can be made reversible with the help of a regenerator?





75373. The ideal efficiency of simple gas turbine cycle depends upon pressure ratio.



75374. A molecule consisting of one atom is known as





75375. The natural petroleum may be separated into





75376. A definite area or a space where some thermodynamic process takes place is known as





75377. The amount of heat required to raise the temperature of __________ water through one degree is called kilojoule.





75378. The universal gas constant (or molar constant) of a gas is the product of





75379. A process, in which the working substance neither receives nor gives out heat to its surroundings during its expansion or compression, is called





75380. All the commercial liquid fuels are derived from natural petroleum (or crude oil).



75381. A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as





75382. The efficiency and work ratio of a simple gas turbine cycle are





75383. The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called





75384. There is a loss of heat in an irreversible process.



75385. In arc welding, the electric arc is produced between the work and the electrode by





75386. In a centrifugal casting method





75387. The draft or taper allowance on casting is generally





75388. Which of the following welding process uses non-consumable electrodes?





75389. In a bilateral system of tolerance, the tolerance is allowed on





75390. In a hot chamber die casting machine





75391. The chisel used for cutting key ways is





75392. The temperature at which the new grains are formed in the metal is called





75393. Thread rolling is restricted to





75394. In sheet metal blanking, shear is provided on punches and dies so that





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