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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. |
Q1 ⇒ The specific heat of air increases with increase in temperature [other wrong options] [Discuss in forum] pressure both pressure and temperature variation of its constituents air flow |
Q2 ⇒ Otto cycle consists of. two constant volume and two isentropic processes [other wrong options] [Discuss in forum] two constant pressure and two isentropic processes two constant volume and two isothermal processes one constant pressure, one constant volume and two isentropic processes |
Q3 ⇒ The efficiency of Stirling cycle is __________ Carnot cycle. equal to [other wrong options] [Discuss in forum] greater than less than none of these. |
Q4 ⇒ If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called free expansion [other wrong options] [Discuss in forum] hyperbolic expansion adiabatic expansion parabolic expansion throttling. |
Q5 ⇒ The standard value of atmospheric pressure taken at sea level is. all of these [other wrong options] [Discuss in forum] 1.013 bar 760 mm of Hg 1013 x 102 N/m2 |
Q6 ⇒ One kg of carbon monoxide requires __________ kg of oxygen to produce 11/7 kg of carbon dioxide gas. 4/7 [other wrong options] [Discuss in forum] All 11/4 9/7 |
Q7 ⇒ Which of the following processes are thermodynamically reversible isothermal and adiabatic. [other wrong options] [Discuss in forum] throttling free expansion constant volume and constant pressure hyperbolic and pV = C |
Q8 ⇒ Select the correct statement as per Charles' law. v/T = constant, if p is kept constant [other wrong options] [Discuss in forum] p.v = constant, if T is kept constant p/T = constant, if v is kept constant T/p = constant, if v is kept constant |
Q9 ⇒ The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by. all of these [other wrong options] [Discuss in forum] Boyle's law Charles' law Gay-Lussac law |
Q10 ⇒ Which of the following processes is irreversible process throttling [other wrong options] [Discuss in forum] isothermal adiabatic all of the above none of the above. |
Q11 ⇒ High air-fuel ratio in gas turbines. reduces exhaust temperature [other wrong options] [Discuss in forum] increases power output improves thermal efficiency do not damage turbine blades |
Q12 ⇒ One kg of carbon produces __________ kg of carbon dioxide. 11/3 [other wrong options] [Discuss in forum] 3/7 7/3 3/11 |
Q13 ⇒ In order that a cycle be reversible, following must be satisfied all of the above [other wrong options] [Discuss in forum] free expansion or friction resisted expansion/compression process should not be encountered when heat is being absorbed, temperature of hot source and working sub¬stance should be same when beat is being rejected, temperature of cold source and working sub-stance should be same none of the above. |
Q14 ⇒ Charles' law states that all perfect gases change in volume by __________ of its original volume at 0° C for every 1° C change in temperature, when pressure remains constant. 1/273th [other wrong options] [Discuss in forum] 1/27th 1/93th 1/173th |
Q15 ⇒ For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume, and T = Absolute temperature). p v = constant, if T is kept constant [other wrong options] [Discuss in forum] v/T = constant, if p is kept constant p/T = constant, if v is kept constant T/p = constant, if v is kept constant |
Q16 ⇒ For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be zero [other wrong options] [Discuss in forum] minimum infinity there is no such criterion. |
Q17 ⇒ The atomic mass of sulphur is. 32 [other wrong options] [Discuss in forum] 12 14 16 |
Q18 ⇒ One Joule (J) is equal to. 1 N-m [other wrong options] [Discuss in forum] 1 kN-m 10 N-m/s 10 kN-m/s |
Q19 ⇒ Minimum work in compressor is possible when the value of adiabatic index n is equal to 1 [other wrong options] [Discuss in forum] 0.75 1.27 1.35 2. |
Q20 ⇒ Which of the following is the extensive property of a thermodynamic system? Volume [other wrong options] [Discuss in forum] Pressure Temperature Density |
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