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You Are On Multi Choice Question Bank SET 1506

75301. The calorific value of gaseous fuel is expressed in





75302. The throttling process is an irreversible steady flow expansion process.



75303. The efficiency of the dual combustion cycle for the same compression ratio, is __________ Diesel cycle.




75304. The thermal efficiency of an ideal gas turbine plant is given by (where r = Pressure ratio)



75305. To ensure complete and rapid combustion of a fuel, some quantity of air, in excess of the theoretical or minimum air is supplied.



75306. According to Regnault's law, the specific heat at constant pressure (cp) and specific heat at constant volume (cv) __________ with the change in pressure and temperature of the gas.



75307. One molecule of oxygen is __________ times heavier than the hydrogen atom.





75308. Relation between cp and cv is given by (where cp = Specific heat at constant pressure, cv = Specific heat at constant volume, γ = cp/cv, known as adiabatic index, and R = Gas constant)



75309. The heat and work are mutually convertible. This statement is called __________ law of thermodynamics.




75310. Kerosene is distilled at





75311. The amount of heat obtained by the complete combustion of 1 kg of a fuel when the products of its combustion are cooled down to the temperature of supplied air is called __________ calorific value offuel.



75312. The mass of flue gas per kg of fuel is the ratio of the





75313. Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules. This statement is called Avogadro's law.



75314. Wood charcoal is produced by heating the wood at 100°C.



75315. The __________ is obtained when carbonisation of coal is carried out at 500° to 700° C.





75316. The bomb calorimeter is used for finding the __________ calorific value of solid and liquid fuels.



75317. The efficiency of the Carnot cycle may be increased by





75318. The atomic mass of sulphur is





75319. A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is





75320. The atomic mass of an element is the number of times the atom of that element is heavier than the hydrogen atom.



75321. A cycle consisting of two isothermal and two isentropic processes, is known as





75322. The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and γ = Ratio of specific heats)



75323. In an ideal gas turbine plant, it is assumed that the compression and expansion processes are





75324. When gas is heated at constant pressure, the heat supplied is utilised in





75325. The amount of heat required to raise the temperature of 1 kg of water through one Kelvin is called





75326. When wood is heated with a limited supply of air to a temperature not less than 280°C, the resulting fuel is





75327. The efficiency of Diesel cycle increases with increase in cut-off.



75328. The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as





75329. It is __________ to make an engine working on a Carnot cycle.



75330. The heating of a gas at constant pressure is governed by


75331. Reversed Joule cycle is known as





75332. Which of the following is the extensive property of a thermodynamic system?





75333. It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.



75334. One kilowatt is equal to





75335. Second law of thermodynamics defines





75336. Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as





75337. The value of one bar (in S. I. units) is equal to





75338. Petrol is distilled at





75339. If the carbon content in the bituminous coal is 78 to 81%, it is said to be coking bituminous coal.



75340. The mass of excess air supplied is equal to



75341. When a perfect gas is expanded through an aperture of minute dimensions, the process is known as





75342. Steam coal is a





75343. The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant)





75344. The atomic mass of nitrogen is __________ oxygen.




75345. One kg of sulphur requires 1 kg of oxygen for complete combustion and produces 2 kg of sulphur dioxide.



75346. The change of entropy, when heat is absorbed by the gas, is




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