MCQ
2101. Air conditioning means--
heating
cooling
dehumidifying
all of these
2102. The entropy in an irreversible cyclic process is -
Remains constant
Decrease
Increase
None of them
2103. When a gas is heated change takes place in.
Pressure
Volume
Temperature
All of these
2104. Which of the following is an extensive property?
Volume
Pressure
Viscosity
All of the above
2105. The value of n = 1 in the polytropic process indicates it to be-
Reversible process
Isothermal process
Adiabatic process
Irreversible process
2106. pick up incorrect statement-the
lithium bromide used in vapour absorption cycle is nonvolatile
lithium bromide plant can't operate below 0 °C
a separator is used in lithium bromide plant to remove the unwanted water vapour by condensing
concentration of solution coming out of lithium bromide generator is more in comparison to that entering the generator
2107. Work done in an adiabatic process between a given pair of end states depends on-
The end states only
particular adiabatic process
The value of index n
The value of heatt ransferred
2108. Clapeyron equation is applicable for registration at—
saturation point of vapour
saturation point of liquid
sublimation temperature
triple point
2109. An isolated system is one in which-
Mass does not cross boundaries of the system, though energy may do so
Neither mass nor energy crosses the boundaries of the system
Both energy and mass cross the boundaries of the system
Mass crosses the boundary but not the energy
2110. Change in enthalpy of a system is the heat supplied at-
Constant pressure
Constant temperature
Constant volume
Constant entropy
2111. In an isolated system, can be transferred between the system and its surrounding.
Only energy
Only mass
Both energy and mass
Neither energy nor mass
2112. To convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is-
Divided by its molecular weight
Multiplied by its molecular weight
Multiplied by its density
Multiplied by its specific weight
2113. Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure?
Enthalpy
Volume
Mass
Entropy
2114. The specific heat of air increases with increase in-
Temperature
Pressure
Both pressure and temperature
Variation of its constituents
2115. An ideal gas as compared to a real gas at very high pressure occupies-
More volume
Less volume
Same volume
Unpredictable behaviour
2116. The extensive properties of a system,-
Are independent of the mass of the system
Depend upon temperature of the system
Depend upon the mass of the system
None of the above
2117. The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy-diagram represents--
condensation of the refrigerant vapour
evaporation of the refrigerant liquid
compression of the refrigerant vapour
meltering of the refrigerant liquid
2118. The same volume of all gases would represent their-
Densities
Specific weights
Molecular weights
Gas characteristic constants
2119. A heat exchange process in which the product of pressure and volume Remains constant is known as-
Heat exchange process
Throttling process
Isentropic process
Hyperbolic process
2120. If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as-
Free expansion
Hyperbolic expansion
Adiabatic expansion
Throttling