# Thermodynamics Quizzes

Thermodynamics is the branch of physics that has to do with heat  and temperature and their relation to energy and work. The behavior of these quantities is governed by the four laws of thermodynamics, irrespective of the composition or specific properties of the material or system in question. The laws of thermodynamics are explained in terms of microscopic constituents by statistical mechanics. Thermodynamics applies to a wide variety of topics in science and engineering , especially physical, chemistry and chemical engineering  and mechanical engineering.

The formation of scale boiler leads to
What is the pH value of water permissible for boiler?
When the rate of evaporation of water is zero, the relative humidity of the air is
What is the difference between work done by a system through an ideal reversible process and actual work done by the system called?
At any point on the saturation curve in psychometric chart, the dry bulb temperature is always
On psychrometric chart, wet bulb temperature lines are
For the same capacity of plant, the COP of the vapour absorption refrigeration system is
The vapour absorption refrigeration system is
Which type of energy is required to expend in vapour absorption refrigeration system?
What is an advantage using analyser-rectifier in aqua-ammonia absorption system?
What is the purpose of using free-shaft turbine?
What is a free-shaft turbine?
In vapour refrigeration cycle, which of the following is used for expansion?
A condenser must_____and then____the compressed refrigerant
Entropy is :
The CHARLES'S law describes relation between:
The relationship between amount and volume discovered by
if two thermodynamic system each are in thermal equilibrium with a third one, then they are in thermal equilibrium with each other it describes from:
What is the unit of work
In thermodynamics, the measure of average thermal of the molecule in a substance is called as
In thermodynamics, the motion of thermal energy is called as:
Work done in all reversible process is equal:
In an open system, for maximum work, the process must be entirely
Which of the following system is true for a steady flow system?
A cylinder/piston contains 100L of air at 25°C, 110 kPa. The air is compressed in a reversible polytropic process to a final state of 200°C, 800 kPa. Assume the heat transfer is with the ambient at 25°C. Find the work done by the air
A piston cylinder contains air at 600 kPa, 290 K and a volume of 0.01m^3. A constant pressure process gives 54 kJ of work out. Find the final volume of the air.
A piston-cylinder device initially contains air at 150 kPa and 27°C. At this state, the volume is 400 litre. The mass of the piston is such that a 350 kPa pressure is required to move it. The air is now heated until its volume has doubled. Determine the total heat transferred to the air.
Which of the following operations occur in a vapour refrigeration cycle?
Which of the following system is correct:
In which process, there is no heat flow takes place between system and surrounding
In expansion process, which of the following remains constant?
The transfer of heat between two bodies in direct is called
Superheating of vapour and subcooling of liquid ____ the refrigerating effect.
Which of the following recommended in a refrigeration cycle?
Heat flow into a system is taken to be ____, and heat flow out of the system is taken as ____
The evaporation process is
One tonne of refrigeration is given as the rate of heat removal from surroundings equivalent to heat required for melting one tonne of ice in a day
The specific heat of the substance is defined as the amount of heat required to raise a unit mass of the substance through a unit rise in temperature.
Which of the following is true?
In the equation, dQ=TdX
A polytropic process (n=-1) starts with P=0, V=0 and ends with V=600 kPa, V= 0.01
m3. Find the boundary work done.
A cylinder/piston contains 1kg methane gas at 100 kPa, 20°C. The gas is compressed reversibly to a pressure of 800 kPa. Calculate the work required if the process is isothermal.
The losses in condenser are__
The thermal effieciency of cycle is
Which of the following losses occur in a cycle?
The heat transfer and the pressure drop reduces the availability of steam.
The efficiency of Carnot cycle is____the efficiency of Rankine cycle is
The main losses in turbine include:
There is transfer of energy as work but not as heat that describes from :
A piston cylinder contains 0.5 kg of airt at 500 kPs and 500 K. The air expands in a process so pressure is linearly decreasing with volume to fnal state of 100 kPa and 300 kPa. Find the work in the process
The process, during which the volume of the system remains constant, is called as:
When the system undergoes change from one state to the other, but its temperature remains constant is said to be :
The process during which the pressure of the system remains constant is called as:
The evaporator produces cooling or refrigerating effect
The relation between Kelvin and Celsius temperature scale is:
Compression can be:
Water____on the melting and has the fusion curve with a___slope.
A mass of 1kg of air contained in a cylinder at 1000 K, 1.5 MPa, expands in a reversible adiabatic process to 100 kPa. Calculate the work done during the process using Constant specific heat.
Heat transfer and work transfer are
The Clausius-Clapeyron equation is given by