Articles Posted in the " Thermodynamics " Category

  • NOZZLE HIGHLIGHTS

    NOZZLE HIGHLIGHTS

    NOZZLE HIGHLIGHTS  There is conversion of pressure into kinetic energy. There is work done in a nozzle. There is no energy transfer in a nozzle. Nozzle is considered horizontal unless otherwise stated i. e. Z1 = Z2 Convergent nozzle is used in industry as spray nozzles. Convergent nozzles are used in all aircrafts. Convergent –divergent […]


  • M C Q ON CONDENSERS

    M C Q ON CONDENSERS

    M C Q ON CONDENSERS A condenser condenses steam coming from the   (a)  Boiler (b) Super heater (c) Economizer (d) None ANS: (d) A condenser in a steam thermal plant (a) Decreases expansion ratio in the turbine (b) Decreases back pressure of steam (c) Increases condensation temperature (d) None ANS: (b) Hot water coming […]


  • M C Q ON ENTROPY OF STEAM/WATER

    M C Q ON ENTROPY OF STEAM/WATER

    M C Q ON ENTROPY OF STEAM/WATER Entropy of water is zero at (a) -400C (b) -200C (c) +400C (d) None ANS: (d) Change of entropy from temperature t1 to t2 is given by (a) ∫ds =∫ cp dT/T (b)∫ ds = ∫cv dT/T (c) ∫ds = ∫(cp dT/T + cv dT/T) (d) None ANS: (a)   Entropy of wet steam is […]


  • M C Q ON THERMODYNAMIC AIR CYCLES

    M C Q ON THERMODYNAMIC AIR CYCLES

    M C Q ON THERMODYNAMIC AIR CYCLES A Carnot Cycle consists of (a) Two isobaric and two isentropic processes (b) Two isothermal and two isobaric processes (c) Two isothermal and two isentropic processes (d) None ANS: © Otto cycle is also known as (a) Constant pressure cycle (b) Constant volume cycle (c) Constant temperature cycle […]


  • M C Q ON PROPERTIES OF STEAM AND WATER

    M C Q ON PROPERTIES OF STEAM AND WATER

    M C Q ON PROPERTIES OF STEAM AND WATER When water is heated with rise of temperature, it consumes (a) Latent heat (b) Enthalpy (c) Sensible heat (d) None ANS: © When water is heated without rise of temperature, it consumes (a) Latent heat (b) Enthalpy (c) Sensible heat (d) None ANSLa) When dry saturated […]


  • MCQ ON INTRODUCTION TO THE THERMODYNAMICS

    MCQ ON INTRODUCTION TO THE THERMODYNAMICS

    MCQ ON INTRODUCTION TO THE THERMODYNAMICS Temperature is a (a) Derived quantity (b) Supplementary quantity © Fundamental quantity None ANS: © A closed thermodynamic system involves the use of (a) Only mass (b) Only Energy (c) Mass and energy (d) None ANS: (d) A thermodynamic system is a (a) 3 dimensional space (b) 2- dimensional […]




  • THERMODYNAMIC–THERMOMETRY——–MEASUREMENT OF TEMPERATURE

    THERMODYNAMIC–THERMOMETRY——–MEASUREMENT OF TEMPERATURE

    THERMODYNAMIC–THERMOMETRY——–MEASUREMENT OF TEMPERATURE THERMOMETRY——–MEASUREMENT OF TEMPERATURE   Thermometry is a device to measure temperature with precision. Accurate Temperature measurement is vital to industrial processes such as steel manufacture, monitoring in transport, food storage, health and safety devices. Principle of thermometry Zeroth law of thermodynamics i.e. two bodies in thermal equilibrium have the same temperature. Two […]