75151. The compression ratio for Diesel engines is
75152. In an isothermal process,
75153. Which of the following is the correct statement of the second law of thermodynamics?
75154. The heating and expanding of a gas is called thermodynamic system.
75155. Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle
75156. Liquid fuels have higher calorific value than solid fuels.
75157. The free expansion process is __________ non-flow process.
75158. A mixture of gas expands from 0.03 m3 to 0.06 m3 at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is
75159. The gas constant (R) is equal to the __________ of two specific heats.
75160. Hydrogen is the __________ substance.
75161. Otto cycle is also known as
75162. For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)
75163. Producer gas is obtained by
75164. The efficiency of a dual combustion cycle __________ upon cut-off ratio.
75165. The efficiency of Diesel cycle depends upon
75166. Those substances which have so far not been resolved by any means into other substances of simpler form are called
75167. The measurement of a thermodynamic property known as temperature is based on
75168. Kelvin-Planck's law deals with
75169. For the same compression ratio, the efficiency of dual combustion cycle is
75170. In an irreversible process, there is a
75171. The amount of heat required to raise the temperature of unit mass of a gas through one degree at constant pressure is called specific heat at constant pressure.
75172. The change of entropy, when heat is removed from the gas, is negative.
75173. Coke is produced
75174. One Joule (J) is equal to
75175. When the expansion or compression takes place according to the law pvn = C, the process is known as
75176. The entropy is a point function and thus it is a property of the same.
75177. The state of a substance whose evaporation from its liquid state is complete, is known as
75178. An open cycle gas turbine works on
75179. The volumetric or molar specific heat at constant pressure is the product of
75180. The efficiency of Carnot cycle depends upon
75181. The gas turbine cycle with regenerator improves
75182. Which of the following has the highest calorific value?
75183. When a gas is heated, change takes place in
75184. Which of the following is an intensive property of a thermodynamic system?
75185. A triatomic molecule consists of __________ atoms.
75186. The main cause for the irreversibility is
75187. A cycle consisting of __________ and two isothermal processes is known as Stirling cycle.
75188. The heat and mechanical energies are mutually convertible. This statement was established by
75189. For the same compression ratio, the efficiency of Diesel cycle is __________ Otto cycle.
75190. Mond gas is obtained by
75191. The natural solid fuel is
75192. The condition for the reversibility of a cycle is
75193. In open cycle gas turbine plants
75194. In an isolated system, neither the heat and work nor the, mass of the working substance crosses the boundary of the system.
75195. The compression ratio is the ratio of
75196. When a fluid is allowed to expand suddenly into a vaccum chamber through an orifice of large dimensions, the process is known as free expansion process.
75197. The efficiency of Ericsson cycle is __________ Carnot cycle.
75198. One molecule of oxygen consists of __________ atoms of oxygen.
75199. According to kinetic theory of gases, the velocity of molecules __________ with the increase in temperature.
75200. The hard coke is obtained when carbonisation of coal is carried out at