THERMODYNAMICS OBJECTIVE QUESTIONS

A. Temperature-entropy curve (T – s curve) of any thermodynamic process represents

• 1.  either heat absorbed or heat rejected
• 2.  heat rejected
• 3.  none of these
• 4.  heat absorbed

B. The second law of thermodynamics?

• 1.  It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source.
• 2.  It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work.
• 3.  There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy.
• 4.  all of the above

C. In an irreversible process there is

1. Gain of heat

2. Loss of heat

3. No gain of heat 

4. No loss of heat

D. Thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called

• 1.  Zeroth law of thermodynamics
• 2.  Second law of thermodynamics
• 3.  First law of thermodynamics
• 4.  Kelvin Planck's law

E. The measurement of a thermodynamic property known as temperature is based on

• 1.  Zeroth law of thermodynamics
• 2.  Second law of thermodynamics
• 3.  First law of thermodynamics
• 4.  none of these

F. The specific heat at constant volume is

• 1.  the amount of heat required to raise the temperature of unit mass of gas through one degree, at constant volume
• 2.  the amount of heat required to raise the temperature of 1 kg of water through one degree
• 3.  the amount of heat required to raise the temperature of unit mass of gas through one degree, at constant pressure
• 4.  any one of the above

G. Kelvin-Planck’s law deals with

• 1.  conservation of heat
• 2.  conservation of work
• 3.  conversion of heat into work
• 4.  conversion of work into heat

H.  For a perfect gas, according to Boyle’s law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)

• 1.  v/T = constant, if p is kept constant
• 2.  T/p = constant, if v is kept constant
• 3.  p v = constant, if T is kept constant
• 4.  p/T = constant, if v is kept constant

I.  The gas constant (R) is equal to the __________ of two specific heats.

• 1.  difference
• 2.  sum
• 3.  product
• 4.  ratio

J.  In an isothermal process

• 1.  there is no change in temperature
• 2.  all of these
• 3.  there is no change in internal energy
• 4.  there is no change in enthalpy