There is no change in internal energy in an isothermal process.  A. Correct  B. Incorrect

There is no change in internal energy in an isothermal process.  A. Correct  B. Incorrect
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In an isothermal process,  A. there is no change in temperature  B. there is no change in enthalpy  C. there is no change in internal energy  D. all of these

Description : In an isothermal process,  A. there is no change in temperature  B. there is no change in enthalpy  C. there is no change in internal energy  D. all of these

Last Answer : Answer: D

In an isothermal process, the internal energy  (a) increases  (b) decreases  (c) remains constant  (d) first increases and then decreases  (e) first decreases and then increases.

Description : In an isothermal process, the internal energy  (a) increases  (b) decreases  (c) remains constant  (d) first increases and then decreases  (e) first decreases and then increases.

Last Answer : Answer : c

In an isothermal process, the internal energy of gas molecules  (a) increases  (b) decreases  (c) remains constant  (d) may increase/decrease depending on the properties of gas  (e) shows unpredictable behaviour.

Description : In an isothermal process, the internal energy of gas molecules  (a) increases  (b) decreases  (c) remains constant  (d) may increase/decrease depending on the properties of gas  (e) shows unpredictable behaviour.

Last Answer : Answer : c

The index of compression n tends to reach ratio of specific heats y when  (a) flow is uniform and steady  (b) process is isentropic  (c) process is isothermal  (d) process is isentropic and specific heat does not change with temperature  (e) process is isentropic and specific heat changes with temperature.

Description : The index of compression n tends to reach ratio of specific heats y when  (a) flow is uniform and steady  (b) process is isentropic  (c) process is isothermal  (d) process ... specific heat does not change with temperature  (e) process is isentropic and specific heat changes with temperature.

Last Answer : Answer : d

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Description : _________ is a thermodynamic potential that measures the “useful” or process-initiating work obtainable from an isothermal, isobaric thermodynamic system.  a. Du-Pont Potential  b. Gibbs free energy  c. Rabz-Eccles Energy  d. Claussius Energy

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An adiabatic process is one in which  A.no heat enters or leaves the gas  B.the temperature of the gas changes  C.the change in internal energy is equal to the mechanical workdone  D.all of the above

Description : An adiabatic process is one in which  A.no heat enters or leaves the gas  B.the temperature of the gas changes  C.the change in internal energy is equal to the mechanical workdone  D.all of the above

Last Answer : Answer: D

During throttling process  (a) heat exchange does not take place  (b) no work is done by expanding steam  (c) there is no change of internal energy of steam  (d) all of the above  (e) entropy decreases.

Description : During throttling process  (a) heat exchange does not take place  (b) no work is done by expanding steam  (c) there is no change of internal energy of steam  (d) all of the above  (e) entropy decreases.

Last Answer : Answer : d

A thermodynamic process in which entropy is conserved  a. isentropic  b. adiabatic  c. isothermal  d. polytropic

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Last Answer : Isochoric process

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Last Answer : adiabatic

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Last Answer : Adiabatic process

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Description : Another name of reversible adiabatic process  a. Isentropic Process  b. Isometric Process  c. Isobaric Process  d. Isothermal Process

Last Answer : Isentropic Process

Ideal process are ________ process  a. Irreversible  b. Reversible  c. Isothermal  d. Isometric

Description : Ideal process are ________ process  a. Irreversible  b. Reversible  c. Isothermal  d. Isometric

Last Answer : Reversible

Gas being heated at constant volume is undergoing the process of.  a. isometric  b. specific heat  c. enthalpy  d. isothermal

Description : Gas being heated at constant volume is undergoing the process of.  a. isometric  b. specific heat  c. enthalpy  d. isothermal

Last Answer : isometric

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What is a process during which the specific volume remains constant?  A. Isobaric process  B. Isothermal process  C. Isochoric or isometric process  D. Isovolumetric process

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Last Answer : Isochoric or isometric process

What is a process during which the pressure remains constant?  A. Isobaric process  B. Isothermal process  C. Isochoric process  D. Isometric process

Description : What is a process during which the pressure remains constant?  A. Isobaric process  B. Isothermal process  C. Isochoric process  D. Isometric process

Last Answer : Isobaric process

What is a process during which the temperature remains constant?  A. Isobaric process  B. Isothermal process  C. Isochoric process  D. Isometric process

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Last Answer : Isothermal process

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Last Answer : Answer: C

A process, in which the temperature of the working substance remains constant during its expansion or compression, is called  A. isothermal process  B. hyperbolic process  C. adiabatic process  D. polytropic process

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Last Answer : Answer: A

An isothermal process is governed by  A. Boyle’s law  B. Charles’ law  C. Gay-Lussac law  D. Avogadro’s law

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If the value of n = 0 in the equation pvn = C, then the process is called  A. constant volume process  B. adiabatic process  C. constant pressure process  D. isothermal process

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Which of the following processes is irreversible process  (a) isothermal  (b) adiabatic  (c) throttling  (d) all of the above  (e) none of the above.

Description : Which of the following processes is irreversible process  (a) isothermal  (b) adiabatic  (c) throttling  (d) all of the above  (e) none of the above.

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The value of n = 1 in the polytropic process indicates it to be  (a) reversible process  (b) isothermal process  (c) adiabatic process  (d) irreversible process  (e) free expansion process.

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Last Answer : Answer : b

Which of the following occurs in a reversible polytrophic process?  a. Enthalpy remains constant  b. Internal energy does not change  c. Some heat transfer occurs  d. Entropy remains constant

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Last Answer : Some heat transfer occurs

Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant  (a) pressure  (b) temperature  (c) volume  (d) internal energy  (e) entropy.

Description : Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant  (a) pressure  (b) temperature  (c) volume  (d) internal energy  (e) entropy.

Last Answer : Answer : c

Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant  (a) pressure  (b) temperature  (c) volume  (d) internal energy  (e) entropy.

Description : Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant  (a) pressure  (b) temperature  (c) volume  (d) internal energy  (e) entropy.

Last Answer : Answer : a

The free expansion process is a constant enthalpy process.  A. Correct  B. Incorrect

Description : The free expansion process is a constant enthalpy process.  A. Correct  B. Incorrect

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One for which no heat is gained or lost  a. Isentropic  b. Adiabatic  c. Isothermal  d. Polytropic

Description : One for which no heat is gained or lost  a. Isentropic  b. Adiabatic  c. Isothermal  d. Polytropic

Last Answer : Adiabatic

Occurring at fixed temperature  a. isentropic  b. Adiabatic  c. Isothermal  d. polytropic

Description : Occurring at fixed temperature  a. isentropic  b. Adiabatic  c. Isothermal  d. polytropic

Last Answer : Isothermal

Which of the following engines is the most efficient?  a. Isobaric expansion  b. Adiabatic compression  c. Adiabatic expansion  d. Isothermal expansion

Description : Which of the following engines is the most efficient?  a. Isobaric expansion  b. Adiabatic compression  c. Adiabatic expansion  d. Isothermal expansion

Last Answer : Isobaric expansion

The ratio of the weight of a substance to the weight of some standard substance is called?  a. Specific Heat  b. Specific Gravity  c. Isothermal  d. Specific Weight

Description : The ratio of the weight of a substance to the weight of some standard substance is called?  a. Specific Heat  b. Specific Gravity  c. Isothermal  d. Specific Weight

Last Answer : Specific Gravity

The most efficient cycle that can operate between two constant temperature reservoir is the _________.  a. Otto Cycle  b. Lazare Cycle  c. Isothermal Cycle  d. Carnot Cycle

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Last Answer : Carnot Cycle

The Carnot cycle is composed of ______ processes.  A. One isothermal and one adiabatic  B. One isothermal and two adiabatic  C. Two isothermal and one adiabatic  D. Two isothermal and two adiabatic

Description : The Carnot cycle is composed of ______ processes.  A. One isothermal and one adiabatic  B. One isothermal and two adiabatic  C. Two isothermal and one adiabatic  D. Two isothermal and two adiabatic

Last Answer : Two isothermal and two adiabatic

The isothermal and isentropic processes are reversible non-flow processes.  A. Agree  B. Disagree

Description : The isothermal and isentropic processes are reversible non-flow processes.  A. Agree  B. Disagree

Last Answer : Answer: A

Ericsson cycle consists of two constant pressure and two isothermal processes.  A. Agree  B. Disagree

Description : Ericsson cycle consists of two constant pressure and two isothermal processes.  A. Agree  B. Disagree

Last Answer : Answer: A

Which of the following processes are thermodynamically reversible  (a) throttling  (b) free expansion  (c) constant volume and constant pressure  (d) hyperbolic and pV = C  (e) isothermal and adiabatic.

Description : Which of the following processes are thermodynamically reversible  (a) throttling  (b) free expansion  (c) constant volume and constant pressure  (d) hyperbolic and pV = C  (e) isothermal and adiabatic.

Last Answer : Answer : e

According to first law of thermodynamics  (a) work done by a system is equal to heat transferred by the system  (b) total internal energy of a system during a process remains constant  (c) internal energy, enthalpy and entropy during a process remain constant  (d) total energy of a system remains constant

Description : According to first law of thermodynamics  (a) work done by a system is equal to heat transferred by the system  (b) total internal energy of a system during a process remains constant  ( ... , enthalpy and entropy during a process remain constant  (d) total energy of a system remains constant

Last Answer : Answer : d

A gas is compressed in a cylinder by a movable piston to a volume onehalf 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) 300 Nm  (b) 300,000 Nm  (c) 30 Nm  (d) 3000 Nm  (e) 30,000 Nm.

Description : A gas is compressed in a cylinder by a movable piston to a volume onehalf 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) 300 Nm  (b) 300,000 Nm  (c) 30 Nm  (d) 3000 Nm  (e) 30,000 Nm.

Last Answer : Answer : b

Entropy is the measure of:  a. The internal energy of a gas  b. The heat capacity of a substance  c. Randomness or disorder  d. The change of enthalpy of a system

Description : Entropy is the measure of:  a. The internal energy of a gas  b. The heat capacity of a substance  c. Randomness or disorder  d. The change of enthalpy of a system

Last Answer : Randomness or disorder

Find the change in internal energy of 5 lb. of oxygen gas when the temperature changes from 100 ˚F to 120 ˚F. CV = 0.157 BTU/lbm-˚R  A.14.7 BTU  B.15.7 BTU  C. 16.8 BTU  D. 15.9 BTU Formula: U= mcv T

Description : Find the change in internal energy of 5 lb. of oxygen gas when the temperature changes from 100 ˚F to 120 ˚F. CV = 0.157 BTU/lbm-˚R  A.14.7 BTU  B.15.7 BTU  C. 16.8 BTU  D. 15.9 BTU Formula: U= mcv T

Last Answer : 15.7 BTU

If a system absorbs 500 cal of heat at the same time does 400J of work, find the change in internal energy of the system.  a. 1400 J  b. 1700 J  c. 1900 J  d. 1500 J

Description : If a system absorbs 500 cal of heat at the same time does 400J of work, find the change in internal energy of the system.  a. 1400 J  b. 1700 J  c. 1900 J  d. 1500 J

Last Answer : 1700 J

If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly  (a) temperature  (b) enthalpy  (c) internal energy  (d) entropy  (e) all of the above.

Description : If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly  (a) temperature  (b) enthalpy  (c) internal energy  (d) entropy  (e) all of the above.

Last Answer : Answer : d

First law of thermodynamics  (a) enables to determine change in internal energy of the system  (b) does not help to predict whether the system will or not undergo a change  (c) does not enable to determine change in entropy  (d) provides relationship between heat, work and internal energy  (e) all of the above.

Description : First law of thermodynamics  (a) enables to determine change in internal energy of the system  (b) does not help to predict whether the system will or not undergo a change  (c) does not enable ... entropy  (d) provides relationship between heat, work and internal energy  (e) all of the above.

Last Answer : Answer : e

The universal gas constant of a gas is the product of molecular mass of the gas and the gas constant.  A. Correct  B. Incorrect

Description : The universal gas constant of a gas is the product of molecular mass of the gas and the gas constant.  A. Correct  B. Incorrect

Last Answer : Answer: A

Water gas is obtained by passing air and a large amount of steam over waste coal at about 650°C.  A.Correct  B.Incorrect

Description : Water gas is obtained by passing air and a large amount of steam over waste coal at about 650°C.  A.Correct  B.Incorrect

Last Answer : Answer: B

What is the measure of the energy that is no longer available to perform useful work within the current environment?  a. enthalpy  b. entropy  c. internal energy  d. latent heat

Description : What is the measure of the energy that is no longer available to perform useful work within the current environment?  a. enthalpy  b. entropy  c. internal energy  d. latent heat

Last Answer : entropy

Which law states that the internal energy of a gas is a function of temperature  (a) Charles’ law  (b) Joule’s law  (c) Regnault’s law  (d) Boyle’s law  (e) there is no such law.

Description : Which law states that the internal energy of a gas is a function of temperature  (a) Charles’ law  (b) Joule’s law  (c) Regnault’s law  (d) Boyle’s law  (e) there is no such law.

Last Answer : Answer : b

The heat Q per unit mass per degree change in temperature that must be supplied or removed to change the temperature of a substance.  a. Specific Heat Capacity  b. Latent Heat  c. Heat of Transformation  d. Internal Heat

Description : The heat Q per unit mass per degree change in temperature that must be supplied or removed to change the temperature of a substance.  a. Specific Heat Capacity  b. Latent Heat  c. Heat of Transformation  d. Internal Heat

Last Answer : Specific Heat Capacity

What happens to the internal energy of water at reference temperature where enthalpy is zero?  a. Becomes negative  b. Becomes positive  c. Remains constant  d. Cannot be defined

Description : What happens to the internal energy of water at reference temperature where enthalpy is zero?  a. Becomes negative  b. Becomes positive  c. Remains constant  d. Cannot be defined

Last Answer : Becomes negative