Internal energy change of a system over one complete cycle in a cyclic process is (A) Zero (B) +ve (C) -ve (D) Dependent on the path

Internal energy change of a system over one complete cycle in a cyclic process is
(A) Zero
(B) +ve
(C) -ve
(D) Dependent on the path
by

1 Answer

Answer :

(A) Zero
by

Related questions

In an ideal refrigeration cycle, the change in internal energy of the fluid is (A) +ve (B) -ve (C) 0 (D) Either of the above three; depends on the nature of refrigerant

Description : In an ideal refrigeration cycle, the change in internal energy of the fluid is (A) +ve (B) -ve (C) 0 (D) Either of the above three; depends on the nature of refrigerant

Last Answer : (C) 0

Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is (A) Positive (B) Negative (C) Zero (D) Infinity

Description : Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is (A) Positive (B) Negative (C) Zero (D) Infinity

Last Answer : C) Zero

. It is desired to bring about a certain change in the state of a system by performing work on the system under adiabatic conditions. (A) The amount of work needed is path dependent (B) Work alone cannot bring out such a change of state (C) The amount of work needed is independent of path (D) More information is needed to conclude anything about the path dependence or otherwise of the work needed

Description : . It is desired to bring about a certain change in the state of a system by performing work on the system under adiabatic conditions. (A) The amount of work needed is path dependent (B) ... (D) More information is needed to conclude anything about the path dependence or otherwise of the work needed

Last Answer : (A) The amount of work needed is path dependent

Work done in a free expansion process is  (a) + ve  (b) -ve  (c) zero  (d) maximum  (e) minimum.

Description : Work done in a free expansion process is  (a) + ve  (b) -ve  (c) zero  (d) maximum  (e) minimum.

Last Answer : Answer : c

The difference of wet bulb temperature and adiabatic saturation temperature of unsaturated mixture of any system is (A) +ve (B) -ve (C) Zero (D) None of these

Description : The difference of wet bulb temperature and adiabatic saturation temperature of unsaturated mixture of any system is (A) +ve (B) -ve (C) Zero (D) None of these

Last Answer : (A) +ve

In a reversible chemical reaction (where, Δx = number of moles of products-number of moles of reactants) (A) Addition of inert gas favours the forward reaction, when Δx is positive (B) Pressure has no effect on equilibrium, when Δn = 0 (C) Addition of inert gas has no effect on the equilibrium constant at constant volume for any value of Δx (+ ve, - ve) or zero) (D) All 'a', 'b' & 'c'

Description : In a reversible chemical reaction (where, Δx = number of moles of products-number of moles of reactants) (A) Addition of inert gas favours the forward reaction, when Δx is positive (B) Pressure has no effect on equilibrium, when Δn = ... any value of Δx (+ ve, - ve) or zero) (D) All 'a', 'b' & 'c'

Last Answer : D) All 'a', 'b' & 'c'

What is produced as a result of the cyclic light dependent reaction? -Biology

Description : What is produced as a result of the cyclic light dependent reaction? -Biology

Last Answer : answer:

Pick out the wrong statement. (A) Enthalpies of all elements in their standard states are assumed to be zero (B) Combustion reactions are never endothermic in nature (C) Heat of reaction at constant volume is equal to the change in internal energy (D) Clausius-Clapeyron equation is not applicable to melting process

Description : Pick out the wrong statement. (A) Enthalpies of all elements in their standard states are assumed to be zero (B) Combustion reactions are never endothermic in nature (C) Heat of reaction ... to the change in internal energy (D) Clausius-Clapeyron equation is not applicable to melting process

Last Answer : (D) Clausius-Clapeyron equation is not applicable to melting process

What refers to any change that a system undergoes from one equilibrium state to another equilibrium state?  A. Process  B. Path  C. Phase  D. Cycle

Description : What refers to any change that a system undergoes from one equilibrium state to another equilibrium state?  A. Process  B. Path  C. Phase  D. Cycle

Last Answer : Process

During adiabatic, internally reversible process, what is true about the change in entropy?  A. It is temperature-dependent  B. It is always greater than zero  C. It is always zero  D. It is always less than zero

Description : During adiabatic, internally reversible process, what is true about the change in entropy?  A. It is temperature-dependent  B. It is always greater than zero  C. It is always zero  D. It is always less than zero

Last Answer : It is always zero

Complete the following statement. The method of incorporating change into project planning and execution processes is called the: Select one: a. project logic diagram. b. change management process. c. milestone schedule d. critical path e. rough order of magnitude

Description : Complete the following statement. The method of incorporating change into  project planning and execution processes is called the: Select one: a. project logic diagram. b. change management process. c. milestone schedule d. critical path e. rough order of magnitude

Last Answer : b. change management process.

Properties of substances like pressure, temperature and density, in thermodynamic coordinates are  (a) path functions  (b) point functions  (c) cyclic functions  (d) real functions (e) thermodynamic functions.

Description : Properties of substances like pressure, temperature and density, in thermodynamic coordinates are  (a) path functions  (b) point functions  (c) cyclic functions  (d) real functions (e) thermodynamic functions.

Last Answer : Answer : b

If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to  (a) + v  (b) – ve  (c) zero  (d) pressure x volume  (e) any where between zero and infinity.

Description : If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to  (a) + v  (b) – ve  (c) zero  (d) pressure x volume  (e) any where between zero and infinity.

Last Answer : Answer : c

Pick out the wrong statement. (A) The net change in entropy in any reversible cycle is always zero (B) The entropy of the system as a whole in an irreversible process increases (C) The entropy of the universe tends to a maximum (D) The entropy of a substance does not remain constant during a reversible adiabatic change

Description : Pick out the wrong statement. (A) The net change in entropy in any reversible cycle is always zero (B) The entropy of the system as a whole in an irreversible process increases (C) The ... to a maximum (D) The entropy of a substance does not remain constant during a reversible adiabatic change

Last Answer : (D) The entropy of a substance does not remain constant during a reversible adiabatic change

Pick out the wrong statement. (A) Minimum number of degree of freedom of a system is zero (B) Degree of freedom of a system containing a gaseous mixture of helium, carbon dioxide and hydrogen is 4 (C) For a two phase system in equilibrium made up of fourchemical species, the number of degrees of freedom is 4 (D) Enthalpy and internal energy change is zero during phase change processes like melting, vaporisation and sublimation

Description : Pick out the wrong statement. (A) Minimum number of degree of freedom of a system is zero (B) Degree of freedom of a system containing a gaseous mixture of helium, carbon ... ) Enthalpy and internal energy change is zero during phase change processes like melting, vaporisation and sublimation

Last Answer : (D) Enthalpy and internal energy change is zero during phase change processes like melting, vaporisation and sublimation

A _________ is a quantity whose value depends on the path followed during a particular change in state.  a. path function  b. point function  c. process  d. cycle

Description : A _________ is a quantity whose value depends on the path followed during a particular change in state.  a. path function  b. point function  c. process  d. cycle

Last Answer : path function

The Knudsen diffusivity is dependent on the (A) Molecular velocity only (B) Pore radius of the catalyst only (C) Molecular mean free path only (D) Molecular velocity and pore radius of the catalyst

Description : The Knudsen diffusivity is dependent on the (A) Molecular velocity only (B) Pore radius of the catalyst only (C) Molecular mean free path only (D) Molecular velocity and pore radius of the catalyst

Last Answer : (D) Molecular velocity and pore radius of the catalyst

In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be (A) ΔQ = 0, ΔS=0 (B) ΔQ = 0, ΔS = +ve (C) ΔQ = 0, ΔS = -ve (D) ΔQ = +ve, ΔS= +ve

Description : In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be (A) ΔQ = 0, ΔS=0 (B) ΔQ = 0, ΔS = +ve (C) ΔQ = 0, ΔS = -ve (D) ΔQ = +ve, ΔS= +ve

Last Answer : (B) ΔQ = 0, ΔS = +ve

For an exothermic reaction (A) Only enthalpy change (ΔH) is negative (B) Only internal energy change (ΔE) is negative (C) Both ΔH and ΔE are negative (D) Enthalpy change is zero

Description : For an exothermic reaction (A) Only enthalpy change (ΔH) is negative (B) Only internal energy change (ΔE) is negative (C) Both ΔH and ΔE are negative (D) Enthalpy change is zero

Last Answer : (C) Both ΔH and ΔE are negative

Extensive property of a system is one whose value  (a) depends on the mass of the system like volume  (b) does not depend on the mass of the system, like temperature, pressure, etc.  (c) is not dependent on the path followed but on the state  (d) is dependent on the path followed and not on the state  (e) is always constant.

Description : Extensive property of a system is one whose value  (a) depends on the mass of the system like volume  (b) does not depend on the mass of the system, like temperature, pressure, etc.  (c) is not ... the state  (d) is dependent on the path followed and not on the state  (e) is always constant.

Last Answer : Answer : a

Intensive property of a system is one whose value  (a) depends on the mass of the system, like volume  (b) does not depend on the mass of the system, like temperature, pressure, etc.  (c) is not dependent on the path followed but on the state  (d) is dependent on the path followed and not on the state  (e) remains constant.

Description : Intensive property of a system is one whose value  (a) depends on the mass of the system, like volume  (b) does not depend on the mass of the system, like temperature, pressure, etc.  (c) is not ... on the state  (d) is dependent on the path followed and not on the state  (e) remains constant.

Last Answer : Answer : b

What is the period of a wave? A. The number of degrees in tone cycle B. The number of zero crossing in one cycle C. The amplitude of the wave D. The time required to complete one cycle

Description : What is the period of a wave? A. The number of degrees in tone cycle B. The number of zero crossing in one cycle C. The amplitude of the wave D. The time required to complete one cycle

Last Answer : D. The time required to complete one cycle

Which of the following statement(s) is/are true concerning translation of the mRNA message to protein synthesis? a. An adaptor molecule, tRNA, recognizes specific nucleic acid bases and unites them with specific amino acids b. Covalent attachment of tRNA to amino acids is energy dependent c. The formation of a peptide bond between the growing peptide chain and the free amino acid occurs in the free cytoplasm d. Complete protein synthesis takes hours

Description : Which of the following statement(s) is/are true concerning translation of the mRNA message to protein synthesis? a. An adaptor molecule, tRNA, recognizes specific nucleic acid bases and unites them ... and the free amino acid occurs in the free cytoplasm d. Complete protein synthesis takes hours

Last Answer : Answer: a, b The synthesis of protein involves conversion from a four-letter nucleotide language to one of 20 chemically distinct amino acids. This process is referred to as ... translation and be moving down the mRNA molecules simultaneously, thus increasing the rate of protein synthesis

Gibbs free energy of mixing at constant pressure and temperature is always (A) 0 (B) ∞ (C) + ve (D) - ve

Description : Gibbs free energy of mixing at constant pressure and temperature is always (A) 0 (B) ∞ (C) + ve (D) - ve

Last Answer : (D) - ve

If a system after undergoing a series of processes, returns to the initial state then  (a) process is thermodynamically in equilibrium  (b) process is executed in closed system cycle  (c) its entropy will change due to irreversibility  (d) sum of heat and work transfer will be zero  (e) no work will be done by the system.

Description : If a system after undergoing a series of processes, returns to the initial state then  (a) process is thermodynamically in equilibrium  (b) process is executed in closed system cycle  (c) its entropy will ... sum of heat and work transfer will be zero  (e) no work will be done by the system.

Last Answer : Answer : d

During menstrual cycle, the cyclic changes take place in

Description : During menstrual cycle, the cyclic changes take place in

Last Answer : During menstrual cycle, the cyclic changes take place in A. Myometrium B. Corpus luteum C. ... implanation -11 to 18 days D. Pertimetrium.

Which layer of uterus undergoes cyclic changes during menstrual cycle

Description : Which layer of uterus undergoes cyclic changes during menstrual cycle

Last Answer : Which layer of uterus undergoes cyclic changes during menstrual cycle A. Myometrium B. Endometrium C. Perimetrium D. All the above.

cAMP is so called because it is formed during (A) TCA cycle (B) Urea cycle (C) Rhodopsin cycle (D) It has a cyclic structure

Description : cAMP is so called because it is formed during (A) TCA cycle (B) Urea cycle (C) Rhodopsin cycle (D) It has a cyclic structure

Last Answer : Answer : D

A plant which completes its life cycle, from seed to seed, in a single growing season is known as: a) perennial b) cyclic c) annual d) circadian

Description : A plant which completes its life cycle, from seed to seed, in a single growing season is known as: a) perennial b) cyclic c) annual d) circadian

Last Answer : ANSWER: C -- Annual

What is a process in which the system remains infinitesimally closed to an equilibrium state at all times?  A. Path equilibrium process  B. Cycle equilibrium process  C. Phase equilibrium process  D. Quasi-state or quasiequilibrium process

Description : What is a process in which the system remains infinitesimally closed to an equilibrium state at all times?  A. Path equilibrium process  B. Cycle equilibrium process  C. Phase equilibrium process  D. Quasi-state or quasiequilibrium process

Last Answer : Quasi-state or quasi- equilibrium process

What refers to the series of state through which a system passes during a process?  A. Path  B. Phase  C. Cycle  D. Direction

Description : What refers to the series of state through which a system passes during a process?  A. Path  B. Phase  C. Cycle  D. Direction

Last Answer : Path

Enthalpy changes over a constant pressure path are always zero for __________ gas. (A) Any (B) A perfect (C) An easily liquefiable (D) A real

Description : Enthalpy changes over a constant pressure path are always zero for __________ gas. (A) Any (B) A perfect (C) An easily liquefiable (D) A real

Last Answer : (B) A perfect

Radioactive decay is a: w) zero-order process x) temperature-dependent process y) first-order process z) second-order process

Description : Radioactive decay is a: w) zero-order process x) temperature-dependent process y) first-order process z) second-order process

Last Answer : ANSWER: Y -- FIRST-ORDER PROCESS 

Centripetal force is dependent on three factors, the odd one out of these factors is A. Mass of the rotating object B. Speed of the rotating object C. Volume of the rotating object D. Path radius

Description : Centripetal force is dependent on three factors, the odd one out of these factors is A. Mass of the rotating object B. Speed of the rotating object C. Volume of the rotating object D. Path radius

Last Answer : Volume of the rotating object

A _________ is a quantity whose value at any state is independent of the path or process used to reach that state.  a. cycle  b. path function  c. point function  d. process

Description : A _________ is a quantity whose value at any state is independent of the path or process used to reach that state.  a. cycle  b. path function  c. point function  d. process

Last Answer : point function

What is a process with identical end states called?  A. Cycle  B. Path  C. Phase  D. Either path or phase

Description : What is a process with identical end states called?  A. Cycle  B. Path  C. Phase  D. Either path or phase

Last Answer : Cycle

Ideal refrigeration cycle is (A) Same as Carnot cycle (B) Same as reverse Carnot cycle (C) Dependent on the refrigerant's properties (D) The least efficient of all refrigeration processes

Description : Ideal refrigeration cycle is (A) Same as Carnot cycle (B) Same as reverse Carnot cycle (C) Dependent on the refrigerant's properties (D) The least efficient of all refrigeration processes

Last Answer : (B) Same as reverse Carnot cycle

Due to change of medium the phase ve- locity of the wave is changed but its frequency remains?

Description : Due to change of medium the phase ve- locity of the wave is changed but its frequency remains?

Last Answer : Constant

Categorize point and path functions from following. (pressure, heat, internal energy, temperature, work, total enthalpy.)

Description : Categorize point and path functions from following. (pressure, heat, internal energy, temperature, work, total enthalpy.)

Last Answer : Point function-Pressure, temperature, internal energy, total enthalpy Path function-Heat, Work

For a cyclic process, a fixed ratio between heat and work (A) Always exists (B) May exist (C) Never exists (D) Is difficult to predict

Description : For a cyclic process, a fixed ratio between heat and work (A) Always exists (B) May exist (C) Never exists (D) Is difficult to predict

Last Answer : (A) Always exists

A butt weld has been made by MMA in a 50mm thick impact tested steel plate. The welding electrode used was a basic type, 5mm diameter. The measured welding parameters for one of the runs was 250 amps, 24 volts, using DC+ve polarity, and a ROL:of 180mm per min. What would be the arc energy? a) Insufficient information given to calculate the arc energy b) 1.9 kJ/mm c) 1.87 kJ/mm d) 2.0 kJ/mm

Description : A butt weld has been made by MMA in a 50mm thick impact tested steel plate. The welding electrode used was a basic type, 5mm diameter. The measured welding parameters for one of the runs was 250 amps, 24 volts, using DC ... given to calculate the arc energy b) 1.9 kJ/mm c) 1.87 kJ/mm d) 2.0 kJ/mm

Last Answer : d) 2.0 kJ/mm

The second law of thermodynamics states that (A) The energy change of a system undergoing any reversible process is zero (B) It is not possible to transfer heat from a lower temperature to a higher temperature (C) The total energy of system and surrounding remains the same (D) None of the above

Description : The second law of thermodynamics states that (A) The energy change of a system undergoing any reversible process is zero (B) It is not possible to transfer heat from a lower temperature to a higher temperature (C) The total energy of system and surrounding remains the same (D) None of the above

Last Answer : (D) None of the above

Second law of thermodynamics is concerned with the (A) Amount of energy transferred (B) Direction of energy transfer (C) Irreversible processes only (D) Non-cyclic processes only

Description : Second law of thermodynamics is concerned with the (A) Amount of energy transferred (B) Direction of energy transfer (C) Irreversible processes only (D) Non-cyclic processes only

Last Answer : (B) Direction of energy transfer

The slot leakage can be calculated by making which of the following assumptions ? (a) The current in the slot conductors is uniformly distributed over their cross-section (b) The leakage path is straight across the slot and around the iron at the bottom (c) The permanence of air paths is only considered. The reluctance of iron paths is assumed as zero (d) All of the above

Description : The slot leakage can be calculated by making which of the following assumptions ? (a) The current in the slot conductors is uniformly distributed over their cross-section (b) The leakage path is straight ... is only considered. The reluctance of iron paths is assumed as zero (d) All of the above

Last Answer : (d) All of the above

State first law of thermodynamics for (i) closed system and cyclic process (ii) closed system and non-cyclic process

Description : State first law of thermodynamics for (i) closed system and cyclic process (ii) closed system and non-cyclic process

Last Answer : First Law of Thermodynamics:  i) Closed System Cyclic Process :- It states that if a system executes a cycle, transferring work and heat through its boundary, the net heat transfer is equivalent to the network ... the system and is known as stored energy or total energy of system.   Q = ΔU + W

Pick out the correct statement. (A) Like internal energy and enthalpy, the absolute value of standard entropy for elementary substances is zero (B) Melting of ice involves increase in enthalpy and a decrease in randomness (C) The internal energy of an ideal gas depends only on its pressure (D) Maximum work is done under reversible conditions

Description : Pick out the correct statement. (A) Like internal energy and enthalpy, the absolute value of standard entropy for elementary substances is zero (B) Melting of ice involves increase in enthalpy and ... of an ideal gas depends only on its pressure (D) Maximum work is done under reversible conditions

Last Answer : (D) Maximum work is done under reversible conditions

When both the fluids flow concurrently in an absorber, the slope of the operating line is (A) -ve (B) +ve (C) 1 (D) -1

Description : When both the fluids flow concurrently in an absorber, the slope of the operating line is (A) -ve (B) +ve (C) 1 (D) -1

Last Answer : (A) -ve