Thermodynamics mostly deals with – Conversion of heat into other form of energy

Mixture of Ice and water form a – Heterogeneous system

Thermodynamics family deals in change of state from heat to work

In engineering thermodynamics the approach towards matter is –  macroscopic and microscopic

When neither the energy nor the mass of the working substances crosses boundary of the system it is then called- isolated system

Heat and work are Path function

The absolute temperature on centigrade scale at which volume of gas becomes zero is (-273 degree Celsius)

The absolute zero temperature is taken as (-273 degree Celsius)

The absolute zero temperature is taken as (-273.15 degree Celsius)

Triple point temperature of water is 273. 16 Kelvin

Triple point temperature of water is 0 degree Celsius

The Fahrenheit and Kelvin scale of temperature will give the same reading at 574. 25 Kelvin

The Fahrenheit and Celsius scales of temperature will give the same reading at – (-40 F)

There no any temperature which has same values both in –  kelvin scale and centigrade scale

which of the following is the smallest temperature 1 degree fahrenheit

Absolute zero(0 k) is that temperature at which – Volume and pressure of a gas becomes Zero

Absolute temperature can be calculated by – Root mean Square velocity

Absolute zero is the temperature at which – Molecular Motion Ceases

Absolute zero is the temperature at which –The root mean Square velocity of the gas molecules reduces to Zero.

Temperature of a gas is produced due to – Kinetic energy of molecules

Very low temperature are measured by – Vapour Pressure thermometers

Very high temperatures are measured by – Pyrometers

For measuring temperature near absolute zero, the thermometer used is – magnetic thermometer

The standard fixed point for temperature measurements in use today is – at which ice, liquid, water and water vapour coexist

The thermometer used for standard reference is the – Gas thermometer

Thermoelectric thermometer is based on – Seebeck eefect

A constant volume gas thermometer works on – Charls Law

No liquid can exist as liquid at – Zero pressure

The unit of energy – Joule (J)

The unit of power – Kilowatt

The unit of mechanical power is – Joule/Sec

One Kilowatt is equal to – 1000N-m/s

According to First law of thermodynamics – Total energy of a system remains constant

First law of thermodynamics deals with – Conservation of energy

The heat and work are manually convertible, this statement is called – First law of thermodynamics

Heat energy stored in the gas and used for raising temperature of Gas is known as – internal energy

The heat and mechanical energies are manually convertible. This statement was established by – joule

The states that change of internal energy of a perfect gas is directly proportional to – joules’s law

The first law thermodynamics was developed by  – joule

Which of the following statement is correct  According to clausis statement of second law of thermodynamics? – it is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.

The heat flows from one body to to hot body with the aid of an external source. This statement is given by – Clausis

Second law of thermodynamics defines – entropy

If heat engine attains 100% of thermal violates – second law ofthermodynamics

The behavior of super-heated vapours is similar to that of – perfect gas

The absolute pressure of a given mass of a perfect gas varies inversely as its volume when the temperature remains constant this statement is known as – Boyle’s law

For a perfect gas according to Boyle’s law PV  = constant if T is kept constant

According to Avogadro law equal volume of all gases at the same temperature and pressure contains equal number of molecules

The general gas equation is PV = nRT

the value of gas constant (r)  for atmospheric air is  – 287j/ kgk

which of the following gas has the minimum molecular mass – hydrogen

The value of universal gas constant is same for all gases

 The amount of heat required to raise the temperature of 1 kg of water through one kelvin is called kilo-joule

The specific heat at constant volume is –  the amount of heat required to raise the temperature of unit mass of gas through one degree at constant volume

Relation between Cp and Cv is given by – Cp-Cv = R

The gas constant (R) is equal to the – difference of two heats

The value of Cp/Cv of air is – 1.4

The value of specific heat at constant pressure for air is -1

An ideal gas as compared to a real gas at very high pressure occupies  more volume

According to Dalton’s law the total pressure of the mixture of gas is equal to  – sum of the partial pressure of all divided by average molecular weight

Temperature of a gas is produced due to – kinetic energy of molecules

 According to kinetic theory of gases the absolute zero temperature is attained when kinetic – energy of the molecules is zero

 kinetic theory of gases is assumes that the collision between the molecules are perfectly elastic

 Gas laws applicable to – gases alone and not to Vapours

the pressure of a gas in terms of the mean kinetic energy per unit volume E is equal to – 2E/3

Temperature (T) ia proportional to – T

The isothermal process and adiabatic processes are regarded as – reversible process.

Carnot cycle consist of – two isothermal and two isentropic process

Strling cycle consist of – two constant volume and two isothermal processes

The efficiency of joule cycle is – less than carnot cycle

Reversed joule cycle is known as – bell-coleman cycle

The compression ration is the ratio of – total volume to clearance volume.

For the same maximum pressure and temperature. disel cycle is more efficient than otto cycle

The efficiency of diesel cycle depends upon – cut off ratio and compression ratio

The gas in cooling chamber of a closed cycle gas turbine is cooled at – constant pressure.

An open cycle turbine works on – joule’s cycle

Share it