1. A heat pump operating at a COP of 4 delivers 1000 W of heating. What is the power input to the pump?

The most efficient method of compressing air is to compress it:

For summer air conditioning the relative humidity should around

Which design data is used for indoor air summer air conditioning?

6. Fins are used in heat exchangers to:

1. A heat engine operates between two reservoirs at 1200 K and 300 K. If the engine delivers 600 kJ of work, what is the minimum amount of heat rejected?

1. In an ideal Brayton cycle, the regeneration process:

Which of the following indicates the thickness of compressor oil?

11. Which refrigerant is known for having a high global warming potential (GWP)?

1. In a Carnot cycle, the entropy change for the system is:

The pressure at the inlet of the refrigerant compressor is called:

1. The Zeroth Law of Thermodynamics is useful for

The value of volumetric efficiency of a compressor decreases when its clearance factor:

1. In a gas turbine, intercooling is used to:

The volumetric efficiency of a compressor depends upon:

Both temporary and permanent hardness of water can be removed by:

16. The efficiency of an ideal Rankine cycle improves with:

1. In a Brayton cycle, regeneration improves efficiency because it:

21. The temperature of a gas increases during compression. How can this be explained using the first law of thermodynamics?

11. The Clausius statement of the second law of thermodynamics implies that:

Which thermometer helps to find out relative humidity?

21. A system exchanges heat but shows no change in enthalpy. What type of process might this be?

11. If a heat engine has an efficiency of 25%, how much heat is rejected for every 1 kJ of work done?

What does BOD stand for?

Temporary hardness of water is caused by the presence of:

1. For a thermodynamic process, the first law of thermodynamics is essentially a statement of:

AHU stands for

Which of the following chart shows relative humidity?

11. An irreversible process always results in:

Why aren't natural convection systems used for crystallizers or viscous fluids?

1.          Rate of evaporation of moisture in air is directly proportional to:

Falling film evaporators heat the tubes using:

Evaporation in the dairy industry is typically done under:

Crystallization, evaporation, and distillation are methods of:

11. Which material has the highest thermal diffusivity?

Psychrometric chart is valid for

The temperature recorder by a thermometer, when it is not affected by the moisture present in, it is called

21. For two phases in equilibrium, which property must be equal for both phases?

16. Which of the following influences natural convection?

11. Radiation heat transfer between two surfaces depends on:

The purpose of an expansion device in a refrigeration system is to:

Specific humidity is defined as the ratio of

Which of the following decreases during sensible cooling of air?

What type of material is often used to seal water-cooled condenser tubes?

1. If the entropy of the universe increases during a process, it indicates that the process is:

1. The maximum work obtainable from two reservoirs at different temperatures is determined by:

1. Which cycle is used in a thermal power plant?

21. The critical temperature of a substance is the temperature:

The Dalton’s law deals with the