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Home⇒ Engineering⇒
Thermodynamics
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ Which of the following is an intensive property of a thermodynamic system? Temperature [other wrong options] [Discuss in forum] Volume Mass Energy |
Q22 ⇒ Molecular volume of any perfect gas at 600 x 103 N/m2 and 27°C will be 4.17m3/kgmol [other wrong options] [Discuss in forum] 400 m3/kg mol 0.15 m3/kg mol 41.7 m3/kg mol 417m3/kgmol. |
Q23 ⇒ The atomic mass of nitrogen is __________ oxygen. less than [other wrong options] [Discuss in forum] equal to more than none of these. |
Q24 ⇒ In open cycle gas turbine plants. all of the above [other wrong options] [Discuss in forum] the indirect heat exchanger and cooler is avoided direct combustion system is used a condenser is used |
Q25 ⇒ A gas is compressed in a cylinder by a movable piston to a volume one-half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be 300,000 Nm [other wrong options] [Discuss in forum] 300 Nm 30 Nm 3000 Nm 30,000 Nm. |
Q26 ⇒ The ultimate analysis of coal consists of the determination of the percentage of. all of these [other wrong options] [Discuss in forum] carbon hydrogen and nitrogen sulphur and ash |
Q27 ⇒ In an extensive property of a thermodynamic system. none of these [other wrong options] [Discuss in forum] extensive heat is transferred extensive work is done extensive energy is utilised |
Q28 ⇒ The more effective way of increasing efficiency of Carnot engine is to decrease lower temperature [other wrong options] [Discuss in forum] increase higher temperature decrease higher temperature increase lower temperature keep lower temperature constant. |
Q29 ⇒ 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. cracking [other wrong options] [Discuss in forum] carbonisation fractional distillation full distillation |
Q30 ⇒ The fuel mostly used in cement industry and in metallurgical processes is. pulverised coal [other wrong options] [Discuss in forum] wood charcoal bituminous coke coke |
Q31 ⇒ Entropy change depends on heat transfer [other wrong options] [Discuss in forum] mass transfer change of temperature thermodynamic state change of pressure and volume. |
Q32 ⇒ The general gas equation is (where p = Pressure, v = Volume, m = mass, T = Absolute temperature, and R = Gas constant). pv = mRT [other wrong options] [Discuss in forum] pv = RTm pvm = C pv = (RT)m |
Q33 ⇒ For reversible adiabatic process, change in entropy is zero [other wrong options] [Discuss in forum] maximum minimum unpredictable negative. |
Q34 ⇒ An open system is one in which. both the heat and work as well as mass of the working substance crosses the boundary of the system [other wrong options] [Discuss in forum] heat and work crosses the boundary of the system, but the mass of the working substance does not crosses the boundary of the system mass of the working substance crosses the boundary of the system but the heat and work does not crosses the boundary of the system neither the heat and work nor the mass of the working substance crosses the boundary of the system |
Q35 ⇒ Isochoric process is one in which no mechanical work is done by the system [other wrong options] [Discuss in forum] free expansion takes place very little mechanical work is done by the system all parameters remain constant mass and energy transfer do not take place. |
Q36 ⇒ Diesel cycle consists of __________ processes. one constant pressure, one constant volume and two isentropic [other wrong options] [Discuss in forum] two constant volume and two isentropic two constant pressure and two isentropic two constant volume and two isothermal |
Q37 ⇒ According to first law of thermodynamics total energy of a system remains constant [other wrong options] [Discuss in forum] work done by a system is equal to heat transferred by the system total internal energy of a system during a process remains constant internal energy, enthalpy and entropy during a process remain constant entropy of a system remains constant. |
Q38 ⇒ The amount of heat generated per kg of fuel is known as. calorific value [other wrong options] [Discuss in forum] heat energy lower calorific value higher calorific value |
Q39 ⇒ Energy can neither be created nor destroyed but can be converted from one form to other is inferred from first law of thermodynamics [other wrong options] [Discuss in forum] zeroth low of thermodynamic second law to thermodynamics basic law of thermodynamics claussius statement. |
Q40 ⇒ The heat and work are mutually convertible. This statement is called __________ law of thermodynamics. First [other wrong options] [Discuss in forum] Zeroth Second none of these. |
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