The unit of power in S.I. units is

Which of the following variables controls the physical properties of a perfect gas

Which of the following laws is applicable for the behavior of a perfect gas

The unit of temperature in S.I. units is

The unit of mass in S.I. units is

The unit of time in S.I. units is

The unit of length in S.I. units is

The unit of energy in S.I. units is

According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as

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

General gas equation is

According to Dalton’s law, the total pres sure of the mixture of gases is equal to

Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits.

The unit of pressure in S.I. units is

A closed system is one in which

Temperature of a gas is produced due to

According to kinetic theory of gases, the absolute zero temperature is attained when

Kinetic theory of gases assumes that the collisions between the molecules are

The pressure’of a gas in terms of its mean kinetic energy per unit volume E is equal to

Kinetic energy of the molecules in terms of absolute temperature (T) is proportional to

Superheated vapour behaves

Absolute zero pressure will occur

No liquid can exist as liquid at

The condition of perfect vacuum, i.e., absolute zero pressure can be attained at

Intensive property of a system is one whose value

Specific heat of air at constant pressure is equal to

Characteristic gas constant of a gas is equal to

The behaviour of gases can be fully determined by

The ratio of two specific heats of air is equal to

Boyle’s law i.e. pV = constant is applicable to gases under

Which law states that the internal energy of a gas is a function of temperature

The same volume of all gases would represent their

Which law states that the specific heat of a gas remains constant at all temperatures and pressures

An open system is one in which

According to which law, all perfect gases change in volume by l/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant

Gases have

According to Avogadro’s Hypothesis

Extensive property of a system is one whose value

Work done in a free expansion process is

The statement that molecular weights of all gases occupy the same volume is known as

To convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is

If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to

An isolated system is one in which

Properties of substances like pressure, temperature and density, in thermodynamic coordinates are

Which of the following quantities is not the property of the system

According to Avogadro’s law, for a given pressure and temperature, each molecule of a gas

Mixture of ice and water form a

Which of the following is the property of a system

On weight basis, air contains following parts of oxygen

Which of the following is not the intensive property

Which of the following items is not a path function

Work done in an adiabatic process between a given pair of end states depends on

Heat and work are

Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure

The value of n = 1 in the polytropic process indicates it to be

Solids and liquids have

A perfect gas at 27°C is heated at constant pressure till its volume is double. The final temperature is

Curve A in Fig. 1.1 compared to curves B and C shows the following type of expansion

If value of n is infinitely large in a polytropic process pV” = C, then the process is known as constant

The index of compression n tends to reach ratio of specific heats y when

Change in enthalpy of a system is the heat supplied at

The term N.T.P. stands for

A heat exchange process in which the product of pressure and volume remains constant is known as

In an isothermal process, the internal energy of gas molecules

Zeroth law of thermodynamics

If a certain amount of dry ice is mixed with same amount of water at 80°C, the final temperature of mixture will be

The basis for measuring thermodynamic property of temperature is given by

One watt is equal to

Work done is zero for the following process

For which of the following substances, the gas laws can be used with minimum error

In a non-flow reversible process for which p = (- 3V+ 15) x 105N/m2,V changes from 1 m to 2 m3. The work done will be about

The value of the product of molecular weight and the gas characteristic constant for all the gases in M.K.S. unit is

On volume basis, air contains following parts of oxygen

Universal gas constant is defined as equal to product of the molecular weight of the gas and

The value of the product of molecular weight and the gas characteristic constant for all the gases in S.I. units is

For which of the following substances, the internal energy and enthalpy are the functions of temperature only

In a free expansion process

If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as

The specific heat of air increases with increase in

If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called

Which of the following processes are thermodynamically reversible

Which of the following processes is irreversible process

In order that a cycle be reversible, following must be satisfied

For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be

Minimum work in compressor is possible when the value of adiabatic index n is equal to

Molecular volume of any perfect gas at 600 x 103 N/m2 and 27°C 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

The more effective way of increasing efficiency of Carnot engine is to

Entropy change depends on

For reversible adiabatic process, change in entropy is

Isochoric process is one in which

According to first law of thermodynamics

Energy can neither be created nor destroyed but can be converted from one form to other is inferred from

First law of thermodynamics furnishes the relationship between

Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant

In an isothermal process, the internal energy

Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant

According to first law of thermodynamics

Total heat of a substance is also known as

. First law of thermodynamics

. Addition of heat at constant pressure to a gas results in

. Carnot cycle has maximum efficiency for

. Measurement of temperature is based on

. Carnot cycle efficiency depends upon

. Carnot cycle efficiency is maximum when

. An engine operates between temperatures of 900°Kandr2 and another engine between T2 and 400°K For both to do equal work, value of T2 will be

. If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly

. If a system after undergoing a series of processes, returns to the initial state then

. An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is

. A manufacturer claims to have a heat engine capable of developing 20 h.p. by receiving heat input of 400 kcal/mt and working between the temperature limits of 227° C and 27° C. His claim is

. In a Carnot cycle, heat is transferred at

. A diathermic wall is one which

. An adiabatic wall is one which

. The door of a running refrigerator inside a room was left open. Which of the following statements is correct?

. Compressed air coming out from a punctured football

. Water contained in a beaker can be made to boil by passing steam through it

. During throttling process

. The energy of molecular motion appears as

. A sudden fall in the barometer reading is a sign of approaching

. The unit’of universal gas constant is

. Calorie is a measure of

. I kgf/cm2 is equal to

. Barometric pressure is equal to

. One barometric pressure or 1 atmospheric pressure is equal to

. The first law of thermodynamics is the law of

. A perpetual motion machine is

. Kelvin Planck’s law deals with

. According to Clausis statement of second law of thermodynamics

. Thermal power plant works on

. Which of the following is an irreversible cycle

. Otto cycle consists of following four processes

. The efficiency of a Carnot engine depends on

. For same compression ratio and for same heat added

. The efficiency of Carnot cycle is maximum for

. Carnot cycle is

. Diesel cycle consists of following four processes

. If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle

. Stirling and Ericsson cycles are

. A cycle consisting of two adiabatics and two constant pressure processes is known as

. Reversed joule cycle is called

. Brayton cycle consists’ of following four processes

. Which of the following cycles is not a reversible cycle

. The cycle in which heat is supplied at constant volume and rejected at constant pressure is known as

. The efficiency of Diesei cycle with decrease in cut off

. Which of the following cycles has maximum efficiency

. The ideal efficiency of a Brayton cycle without regeneration with increase ni pressure ratio will

. The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will

. The following cycle is used for air craft refrigeration

. Gas turbine cycle consists of

. The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that