|

PROPERTIES OF STEAM CLASS NOTES FOR MECHANICAL ENGINEERING

PROPERTIES OF STEAM CLASS NOTES FOR MECHANICAL ENGINEERING   Specific properties are per kg. Examples are specific volume, specific values of enthalpy, entropy,  internal energy and latent heat. Symbol Small alphabets represent specific properties. Firstly specific volume =v Secondly specific enthalpy = h Thirdly specific entropy = s Fourthly specific internal energy =u Specific heat =cP…

|

PHASE TRANSFORMATIONS OF WATER CLASS NOTES

PHASE TRANSFORMATIONS OF WATER CLASS NOTES Phase transformation means change of ice to water and from water to steam. It takes place at constant temperature and at constant pressure respectively. SUB-COOLED ICE Ice at a temperature lower than its freezing temperature 00C is called sub-cooled ice. Hence ice at -60C, -130C, -290C will be sub-cooled ice….

| |

COMPRESSORS, SUPERCHARGERS & TURBOCHARGERS

COMPRESSORS, SUPERCHARGERS & TURBOCHARGERS Rotary compressors handle more volume with lesser increase in pressure. Centrifugal compressors handle very large volume with less increase in pressure. Superchargers are high speed rotary compressors.  Turbochargers are high speed turbines. Exhaust gases of internal combustion engines run turbochargers. Turbochargers run superchargers. Sr. No. ASPECT RECIPROCATING COMPRESSORS ROTARY COMPRESSORS 1….

| |

IMPORTANT FACTS ABOUT ENTROPY CLASS NOTES

IMPORTANT FACTS ABOUT ENTROPY CLASS NOTES Entropy is energy flow from order to disorder. However, entropy is quantitative measure of disorder or randomness or chaos in a system. Thus, a highly ordered system has low entropy. 1.1 Entropy and Disorder Entropy and disorder is related to equilibrium. Perfect internal disorder is equilibrium and random disorder…

| |

WATER HAMMER MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

WATER HAMMER MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS Fig. Water Hammer (Sudden closure of valve) 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…

| |

STEAM CONDENSERS MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

STEAM CONDENSERS MULTIPLE-CHOICE QUESTIONS (MCQ) WITH ANSWERS  MCQ on steam condensers increase the understanding about the working of condensers. Later, it helps in the design of condensers. Fig. Surface Steam Condenser Fig. Jet Steam Condenser A condenser condenses steam coming from the (a)  Boiler (b) Super heater (c) Economizer (d) None ANS: (d) A condenser…

| | |

ENTROPY OF STEAM MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

ENTROPY OF STEAM MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS    Entropy is randomness. More is the randomness, more is the entropy. Every process in nature is ir-reversible. An ir- reversible process increases entropy. Increase of entropy means capacity to do useful work decreases. Entropy of water is zero at (a) -400C (b) -200C (c) +400C…

| |

AIR STANDARD CYCLES MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

  AIR STANDARD CYCLES MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS  MCQ increases knowledge, understanding and clarity. One gains lot of confidence. Carnot, Otto, Brayton and Diesel cycles are air cycles. These are power producing cycles. Basic principles are easily applied in the real life applications. A Carnot Cycle consists of (a) Two isobaric and two…

| |

STEAM MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

STEAM MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS   MCQ help to understand a topic in depth.  It helps in the operation of a steam device. It helps in trouble shooting.  Water consumes  heat on rise of temperature (a) Latent heat (b) Enthalpy (c) Sensible heat (d) None ANS: ©  Water consumes heat without rise of temperature (a)…