Complete RGPV exam-oriented page covering thermodynamic system, properties, state, process, Zeroth law, First law, Second law, enthalpy, entropy, boilers, boiler mountings, accessories, draught, steam properties and steam tables.
Thermodynamics and Steam Engineering important topics
Easy points for fast revision
Thermodynamics is the branch of science that deals with heat, work and energy interactions. It is used in power plants, refrigeration systems, automobiles and turbines.
A thermodynamic system is a quantity of matter or region under study. It may be open system, closed system or isolated system.
If two bodies are separately in thermal equilibrium with a third body, then they are in thermal equilibrium with each other. It is the basis of temperature measurement.
First law states that energy can neither be created nor destroyed, it can only be converted from one form to another.
Second law defines the direction of heat transfer. Heat cannot completely convert into work without losses.
Enthalpy is the total heat content of a system. It is represented by H and commonly used in steam and heat calculations.
Boiler is a closed vessel used to generate steam by heating water. Boilers are mainly classified into fire tube boilers and water tube boilers.
Boiler mountings are safety devices like safety valve and pressure gauge. Accessories improve efficiency, such as economizer, superheater and air preheater.
Important numerical formulas
High chance RGPV exam questions
Repeated questions from previous RGPV papers
| Topic | Repeated Questions | Frequency | Priority |
|---|---|---|---|
| First Law of Thermodynamics | Statement, explanation, applications and numerical problems | Very High | ★★★★★ |
| Boilers | Classification, working, fire tube and water tube comparison | Very High | ★★★★★ |
| Boiler Mountings & Accessories | Functions, neat sketch, safety devices and efficiency devices | High | ★★★★ |
| Second Law | Kelvin-Planck statement, Clausius statement and applications | High | ★★★★ |
| Steam Tables | Steam properties and use of steam tables | Medium | ★★★ |
| Enthalpy & Entropy | Definitions, significance and formulas | Medium | ★★★ |
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Common student doubts
First law of thermodynamics, boilers, boiler mountings and accessories, second law and steam tables are most important.
First law, work done at constant pressure, enthalpy and boiler efficiency numericals are important.
Boiler diagram, boiler mountings, boiler accessories, fire tube boiler and water tube boiler diagrams are important.