Thermodynamics Questions

• According to Gay-Lussac law for a perfect gas, p/T = constant, if v is kept constant.
• There is a loss of heat in an irreversible process.
• All the commercial liquid fuels are derived from natural petroleum (or crude oil).
• When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.
• The efficiency and work ratio of a simple gas turbine cycle are
• The processes occuring in open system which permit the transfer of mass to and from the system, are known as
• The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (cv) is
• The universal gas constant of a gas is the product of molecular mass of the gas and the gas constant.
• An isothermal process is governed by
• The efficiency of Stirling cycle is __________ Carnot cycle.
• According to Kelvin-Planck's statement of second law of thermodynamics,
• The area under the temperature-entropy curve (T - s curve) of any thermodynamic process represents
• For a perfect gas, according to Boyle's law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)
• According to Gay-Lussac law, the absolute pressure of a given mass of a perfect gas varies __________ as its absolute temperature, when the volume remains constant.
• The efficiency of Diesel cycle depends upon
• The general gas energy equation is (where Q1 - 2 = Heat supplied, dU = Change in internal energy, and W1 - 2 = Work done in heat units)
• The dual combustion cycle consists of one constant pressure, two constant volume and two isentropic processes.
• When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called
• Kelvin-Planck's law deals with
• The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume at the end of expansion)