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  • M C Q ON CAVITATION

    M C Q ON CAVITATION

                     M C Q ON CAVITATION ·         1. Cavitation is a process of (a) Liquid formation (b) Vapor formation (c) Neither vapor nor liquid formation (d) None ANS: (b) Cavitation is found in (a) An accelerated liquid flow (b) De-accelerated flow (c) Gas flow (d) None ANS: (a) […]


  • 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 WATER HAMMER

    M C Q ON WATER HAMMER

    M C Q ON WATER HAMMER The other name of water hammer is (a) Shock wave (b) Fluid blow (c) Water blow (d) None ANS: ( c) Water hammer is due to (a) Sudden change in internal energy (b) Sudden change in potential energy (c) Sudden change in molecular energy (d) None ANS: (d) Water […]



  • WATER HAMMER / FLUID HAMMER/HYDRAULIC SHOCK / WATER BLOW

    WATER HAMMER / FLUID HAMMER/HYDRAULIC SHOCK / WATER BLOW

    WATER HAMMER / FLUID HAMMER/HYDRAULIC SHOCK / WATER BLOW Water hammer is also called a fluid hammer or Hydraulic Shock’ or a water blow.  It largely takes place in liquids but to a limited extent it can also be present in gases. It is a very high pressure wave created due to sudden change in […]



  • 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 […]