Mechanical blog

1. Which of the following variables controls the physical properties of a per (a) pressure (b) temperature (c) volume (d) all of the above (e) atomic mass. Ans: d 2. Which of the following laws is applicable for the behavior of a perfect gas (a) Boyle's law      (b) Charles'law (c) Gay-Lussac law (d) all of the above (e) Joule's law. Ans: d 3. The unit of temperature in S.I. units is (a) Centigrade      (b) Celsius (c) Fahrenheit       (d) Kelvin (e) Rankine. Ans: d 4. The unit of mass in S.I. units is (a) kilogram (b) gram (c) tonne                (d) quintal (e) newton. Ans: a 5. The unit of time in S.I. units is (a) second (b) minute (c) hour                (d) day (e) year. Ans:...

Engineering Thermodynamics - Rajput Download

ABSOLUTE TEMPERATURE  The temperature of a substance measured above absolute zero. ABSOLUTE ZERO TEMPERATURE  Temperature at which all molecular motion ceases, according to the kinetic theory of gases. A point which has been determined on the thermodynamic scale (by theoretical considerations) beyond which a further decrease in temperature is inconceivable. This is equal to – 459.6° on the fahrenheit scale and – 273.1° on the centigrade scale. ABSOLUTE TEMPERATURE SCALES  Used for calculating changes in refrigerant vapour pressures. ADIABATIC EXPANSION or COMPRESSION  Expansion or compression where the temperature rises during compression and falls during expansion without any loss of heat to the cylinder walls or absorption of heat from the walls.  ADIABATIC HEAT DROP  The heat energy released and theoretically capable of transformation into mechanical work during the adiabatic expansion of unit weight of steam or other ...