The first law of thermodynamics is the law of
The first law of thermodynamics is the law of
When a gas is heated, change takes place in
When a gas is heated, change takes place in
Otto cycle consists of
Otto cycle consists of
The hard coke is obtained when carbonization of coal is carried out at
The hard coke is obtained when carbonization of coal is carried out at
A process, in which the temperature of the working substance remains constant during its expansion or compression, is called
A process, in which the temperature of the working substance remains constant during its expansion or compression, is called
A sudden fall in the barometer reading is a sign of approaching
A sudden fall in the barometer reading is a sign of approaching
According to kinetic theory of gases, the velocity of molecules __________ with the increase in temperature.
According to kinetic theory of gases, the velocity of molecules __________ with the increase in temperature.
According to Kelvin-Planck's statement of second law of thermodynamics,
According to Kelvin-Planck's statement of second law of thermodynamics,
The efficiency of Diesel cycle with decrease in cut-off
The efficiency of Diesel cycle with decrease in cut-off
In an ideal gas turbine plant, it is assumed that the compression and expansion processes are
In an ideal gas turbine plant, it is assumed that the compression and expansion processes are
Stirling and Ericsson cycles are
Stirling and Ericsson cycles are
One kg of carbon produces ________ kg of carbon dioxide.
One kg of carbon produces ________ kg of carbon dioxide.
The efficiency of a Carnot engine depends on
The efficiency of a Carnot engine depends on
If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly
If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly
Universal gas constant is defined as equal to product of the molecular weight of the gas and
Universal gas constant is defined as equal to product of the molecular weight of the gas and
The change of entropy, when heat is absorbed by the gas, is
The change of entropy, when heat is absorbed by the gas, is
A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as
A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as
The efficiency of Diesel cycle approaches to Otto cycle efficiency when
The efficiency of Diesel cycle approaches to Otto cycle efficiency when
If value of n is infinitely large in a polytropic process pVn = C, then the process is known as constant
If value of n is infinitely large in a polytropic process pVn = C, then the process is known as constant
The fuel mostly used in blast furnace for extracting pig iron from iron ores is
The fuel mostly used in blast furnace for extracting pig iron from iron ores is
When gas is heated at constant pressure, the heat supplied is utilized in
When gas is heated at constant pressure, the heat supplied is utilized in
On weight basis, air contains following parts of oxygen
On weight basis, air contains following parts of oxygen
Which of the following statement is correct?
Which of the following statement is correct?
The index of compression ‘n’ tends to reach ratio of specific heats ‘y’ when
The index of compression ‘n’ tends to reach ratio of specific heats ‘y’ when
The temperature at which the volume of a gas becomes zero is called
The temperature at which the volume of a gas becomes zero is called
A cycle consisting of two adiabatic and two constant pressure processes is known as
A cycle consisting of two adiabatic and two constant pressure processes is known as
The universal gas constant (or molar constant) of a gas is the product of
The universal gas constant (or molar constant) of a gas is the product of
Which of the following is the property of a system?
Which of the following is the property of a system?
The compression ratio for Diesel engines is
The compression ratio for Diesel engines is
Work-done during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and γ = Ratio of specific heats)
Work-done during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and γ = Ratio of specific heats)
According to Dalton's law, the total pressure of the mixture of gases is equal to
According to Dalton's law, the total pressure of the mixture of gases is equal to
Which of the following statement is correct?
Which of the following statement is correct?
The heat flows from a cold body to a hot body with the aid of an external source. This statement is given by
The heat flows from a cold body to a hot body with the aid of an external source. This statement is given by
When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.
When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.
According to First law of thermodynamics,
According to First law of thermodynamics,
The ratio of two specific heats of air is equal to
The ratio of two specific heats of air is equal to
The efficiency of the Carnot cycle is (where T1 and T2 = Highest and lowest temperature during the cycle)
The efficiency of the Carnot cycle is (where T1 and T2 = Highest and lowest temperature during the cycle)
The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and γ = Ratio of specific heats)
The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and γ = Ratio of specific heats)
Which of the following has the minimum atomic mass?
Which of the following has the minimum atomic mass?
One kg of carbon produces __________ kg of carbon dioxide.
One kg of carbon produces __________ kg of carbon dioxide.
The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.
The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.
The same volume of all gases would represent their
The same volume of all gases would represent their
The pressure exerted by an ideal gas is ________ of the kinetic energy of all the molecules contained in a unit volume of gas.
The pressure exerted by an ideal gas is ________ of the kinetic energy of all the molecules contained in a unit volume of gas.
A gas is compressed in a cylinder by a movable piston to a volume one half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be
A gas is compressed in a cylinder by a movable piston to a volume one half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be
One molecule of oxygen is __________ times heavier than the hydrogen atom.
One molecule of oxygen is __________ times heavier than the hydrogen atom.
Reversed joule cycle is called
Reversed joule cycle is called
In a steady flow process, the ratio of
In a steady flow process, the ratio of
Select the wrong statement
Select the wrong statement
The pressure of a gas in terms of its mean kinetic energy per unit volume 'E' is equal to
The pressure of a gas in terms of its mean kinetic energy per unit volume 'E' is equal to
The heat energy stored in the gas and used for raising the temperature of the gas is known as
The heat energy stored in the gas and used for raising the temperature of the gas is known as
The behavior of super-heated vapour is similar to that of
The behavior of super-heated vapour is similar to that of
In an isothermal process, the internal energy
In an isothermal process, the internal energy
A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is
A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is
The ideal efficiency of a Brayton cycle without regeneration, with increase in pressure ratio will
The ideal efficiency of a Brayton cycle without regeneration, with increase in pressure ratio will
In a free expansion process
In a free expansion process
Carnot cycle consists of
Carnot cycle consists of
The value of the product of molecular weight and the gas characteristic constant for all the gases in M.K.S. unit is
The value of the product of molecular weight and the gas characteristic constant for all the gases in M.K.S. unit is
Which of the following statement is correct according to Clausis statement of second law of thermodynamics?
Which of the following statement is correct according to Clausis statement of second law of thermodynamics?
Which law states that the specific heat of a gas remains constant at all temperatures and pressures?
Which law states that the specific heat of a gas remains constant at all temperatures and pressures?
Work done is zero for the following process
Work done is zero for the following process
Heat and work are
Heat and work are
On volume basis, air contains following parts of oxygen
On volume basis, air contains following parts of oxygen
1 kgf/cm² is equal to
1 kgf/cm² is equal to
Calorie is a measure of
Calorie is a measure of
Carnot cycle efficiency depends upon
Carnot cycle efficiency depends upon
The heat and work are mutually convertible. This statement is called __________ law of thermodynamics.
The heat and work are mutually convertible. This statement is called __________ law of thermodynamics.
If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle
If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle
A cycle consisting of two constant pressure and two isentropic processes is known as
A cycle consisting of two constant pressure and two isentropic processes is known as
The value of gas constant (R) in S. I. units is
The value of gas constant (R) in S. I. units is
Kerosene is distilled at
Kerosene is distilled at
The entropy __________ in an irreversible cyclic process.
The entropy __________ in an irreversible cyclic process.
The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume at the end of expansion)
The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume at the end of expansion)
Superheated vapour behaves
Superheated vapour behaves
According to Kelvin-Planck’s statement of second law of thermodynamics,
According to Kelvin-Planck’s statement of second law of thermodynamics,
During throttling process
During throttling process
The oxygen atom is ________ times heavier than the hydrogen atom.
The oxygen atom is ________ times heavier than the hydrogen atom.
Which of the following statement is incorrect?
Which of the following statement is incorrect?
The unit of energy is S. I. units is
The unit of energy is S. I. units is
In a Carnot cycle, heat is transferred at
In a Carnot cycle, heat is transferred at
Absolute zero pressure will occur
Absolute zero pressure will occur
For which of the following substances, the gas laws can be used with minimum error
For which of the following substances, the gas laws can be used with minimum error
Reversed Joule cycle is known as
Reversed Joule cycle is known as
One kg of ethylene (C2H4) requires 2 kg of oxygen and produces 22/7 kg of carbon dioxide and __________ kg of water or steam.
One kg of ethylene (C2H4) requires 2 kg of oxygen and produces 22/7 kg of carbon dioxide and __________ kg of water or steam.
The gas turbine cycle with regenerator improves
The gas turbine cycle with regenerator improves
Stirling cycle consists of
Stirling cycle consists of
One Joule (J) is equal to
One Joule (J) is equal to
The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will
The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will
Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as
Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as
The volumetric or molar specific heat at constant pressure is the product of
The volumetric or molar specific heat at constant pressure is the product of
If a certain amount of dry ice is mixed with same amount of water at 80°C, the final temperature of mixture will be
If a certain amount of dry ice is mixed with same amount of water at 80°C, the final temperature of mixture will be
Which of the following is the correct statement of the second law of thermodynamics?
Which of the following is the correct statement of the second law of thermodynamics?
The fuel mostly used in cement industry and in metallurgical processes is
The fuel mostly used in cement industry and in metallurgical processes is
Thermal power plant works on
Thermal power plant works on
For the constant pressure and heat input, the air standard efficiency of gas power cycle is in the order
For the constant pressure and heat input, the air standard efficiency of gas power cycle is in the order
The condition for the reversibility of a cycle is
The condition for the reversibility of a cycle is
