Q1:

Thermodynamics is the science of

Q2:

A system is in thermodynamics equilibrium when,

Q3:

In a steady flow,

Q4:

Compressor work is

Q5:

For reversible cycle Clausius inequality ${\displaystyle \oint \frac{dQ}{T}}$ is

Q6:

The ratio of the mass of vapour to the total mass of the mixture is called

Q7:

Consider the following thermodynamic relations:

1. Tds = du + pdv

2. Tds = du – pdv

3. Tds = dh + vdp

4. Tds = dh – vdp

Which of these thermodynamic relations are correct?

Q8:

An isolated thermodynamic system executes a process, choose the correct statement(s) form the following:

Q9:

Heat and work are

Q10:

Isothermal curves for an ideal gas are:

Q11:

Which of the following is correct?

Q12:

Joule-Thomson coefficient is defined as:

Q13:

The air standard Otto cycle comprises:

Q14:

Loss in available energy is due to:

Q15:

Heat transfer takes place according to:

Q16:

In Gibbs phase rule P + F = C + 2. Where P, F, C are:

Q17:

Which of the following are intensive properties.

1. Volume

2. Pressure

3. Viscosity

4. Conductivity

Q18:

Thermodynamic work is the product of:

Q19:

Consider the following properties:

1. Entropy 2. Viscosity 3. Temperature 4. Specific heat at constant volume

Which of the above properties of a system is/are extensive?

Q20:

Which is the slope of isothermal curves on P-V diagram?

Q21:

C_P > C_V, which of the following is correct explanation?

Q22:

Degree of freedom at triple point is:

Q23:

If a heat engine gives an output of 3 kW when the input is 10,000 J/s, then the thermal efficiency of the engine will be:

Q24:

For a closed system, the difference between the heat added to the system and the work done by the system is equal to the change in

Q25:

Consider the following statements:

The definition of

1. Temperature is due to Zeroth Law of Thermodynamics.

2. Entropy is due to First Law of Thermodynamics.

3. Internal energy is due to Second Law of Thermodynamics.

4. Reversibility is due to Kelvin-Planck's statement. Of these statements:

Q26:

A system of 100 kg mass undergoes a process in which its specific entropy increases from 0.3 kJ/kg-K to 0.4 kJ/kg-K. At the same time, the entropy of the surroundings decreases from 80 kJ/K to 75 kJ/K. The process is:

Q27:

During throttling process enthalpy 

Q28:

A cycle of pressure – volume diagram is shown in the given Fig. Same cycle on temperature-entropy diagram will be represented by:

Q29:

Considers the following properties of vapour:

1. Pressure 2. Temperature 3. Dryness fraction 4. Specific volume

Which of these two properties alone are not sufficient to specify the condition of a vapour?

Q30:

The conversion of water from 40°C to steam at 200°C pressure of 1 bar is best represented as:

Q31:

In a new temperature scale say °ρ, the boiling and freezing points of water at one atmosphere are 100°ρ and 300°ρ respectively. Correlate this scale with the Centigrade scale. The reading of 0°ρ on the Centigrade scale is:

Q32:

One kg of ice at 0°C is completely melted into water at 0°C at 1 bar pressure. The latent heat of fusion of water is 333 kJ/kg and the densities of water and ice at 0°C are 999.0 kg/m³ and 916.0 kg/m³, respectively. What are the approximate values of the work done and energy transferred as heat for the process, respectively?

Q33:

A gas is compressed in a cylinder by a movable piston to a volume one-half of its original volume. During the process, 300 kJ heat left the gas and the internal energy remained same. What is the work done on the gas?

Q34:

A 4 kW, 20 litre water heater is switched on for 10 minutes. The heat capacity Cp for water is 4 kJ/kg K. Assuming all the electrical energy has gone into heating the water, what is the increase of the water temperature?

Q35:

An inventor says that his new concept of an engine, while working between temperature limits of 27°C and 327°C rejects 45% of heat absorbed from the source. His engine is then equivalent to which one of the following engines?

Q36:

An engine operates between temperature limits of 900 K and T₂ and another between T₂ and 400 K. For both to be equally efficient, the value of T₂ will be

Q37:

A Carnot engine operates between 327°C and 27°C. If the engine produces 300 kJ of work, what is the entropy change during heat addition?

Q38:

For a steady flow process from state 1 to state 2 enthalpy change from h₁=400kJ/kg to h₂=100 kJ/kg and entropy change from S₁= 1.1 kJ/kg-k to S₂= 0.7 kJ/kg-k and ambient temperature T₀=300 k, then change in availability is:

Q39:

An engine working on air standard Otto cycle has a cylinder diameter of 10 cm and stroke length of 15 cm. The ratio of specific heats for air is 1.4. If the clearance volume is 196.3 cc and the heat supplied per kg of air per cycle is 1800kJ/kg, then work output per cycle per kg of air is:

Q40:

The variation of saturation pressure with saturation temperature for a liquid is 0.1 bar/K at 400 K. The specific volume of saturated liquid and dry saturated vapour at 400 K are 0.251 and 0.001 m3/kg. What will be the value of latent heat of vaporization using Clausius Clapeyron equation?