Mechanical Engineering : Thermodynamics QUESTIONS AND ANSWERS :: part4 : 6 to 10
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be |
| zero |
| minimum |
| maximum |
| infinity |
| there is no such criterion. |
7.Total heat of a substance is also known as |
| internal energy |
| entropy |
| thermal capacity |
| enthalpy |
| thermal conductance. |
8.In order that a cycle be reversible, following must be satisfied |
| 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 |
| all of the above |
| none of the above. |
9.Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant |
| pressure |
| temperature |
| volume |
| internal energy |
| entropy. |
10.Which of the following processes are thermodynamically reversible |
| throttling |
| free expansion |
| constant volume and constant pressure |
| hyperbolic and pV = C |
| isothermal and adiabatic. |
More Thermodynamics QUESTIONS AND ANSWERS available in next pages
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