Description : A heat exchange process in which the product of pressure and volume remains constant is known as (a) heat exchange process (b) throttling process (c) isentropic process (d) adiabatic process (e) hyperbolic process.
Last Answer : Answer : e
Description : 195.Which parameter remains constant in isochoric process ?
Last Answer : Volume.
Description : Work done is zero for the following process (a) constant volume (b) free expansion (c) throttling (d) all Of the above (e) none of the above.
Last Answer : Answer : d
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.
Description : All gases during throttling process at atmospheric temperature and pressure show a cooling effect except (A) CO2 (B) H2 (C) O2 (D) N2
Last Answer : (B) H2
Description : In thermodynamics, a throttling process, also called a _________, is a type of isenthalpic process where a liquid or gas is cooled as it passes from a higher pressure state to a lower pressure state. a. Rankine Process b. Carnot Cycle c. Joule-Thomson process d. Refrigeration process
Last Answer : Joule-Thomson process
Description : An adiabatic process in which there is no change in system enthalpy but for which there is a significant decrease in pressure is called _____. A. Isochoric process B. Isobaric process C. Throttling process D. Quasistatic process
Last Answer : Throttling process
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.
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.
Last Answer : Answer : c
Description : If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called (a) free expansion (b) hyperbolic expansion (c) adiabatic expansion (d) parabolic expansion (e) throttling.
Last Answer : Answer : a
Description : If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as (a) free expansion (b) hyperbolic expansion (c) adiabatic expansion (d) parabolic expansion (e) throttling.
Description : Throttling (Joule-Thomson effect) process is a constant __________ process. (A) Enthalpy (B) Entropy (C) Pressure (D) None of these
Last Answer : (A) Enthalpy
Description : Claude gas liquefaction process employs cooling (A) At constant pressure (B) By throttling (C) By expansion in an engine (D) None of these
Last Answer : (C) By expansion in an engine
Description : Throttling process is a/an __________ process. (A) Reversible and isothermal (B) Irreversible and constant enthalpy (C) Reversible and constant entropy (D) Reversible and constant enthalpy
Last Answer : (B) Irreversible and constant enthalpy
Description : Linde gas liquefaction process employs cooling (A) By throttling (B) By expansion in an engine (C) At constant pressure (D) None of these
Last Answer : (A) By throttling
Description : Joule-Thomson effect i.e., a throttling process is a constant __________ process. (A) Entropy (B) Temperature (C) Internal energy (D) Enthalpy
Last Answer : (D) Enthalpy
Description : The adiabatic throttling process of a perfect gas is one of constant enthalpy (A) In which there is a temperature drop (B) Which is exemplified by a non-steady flow expansion (C) Which can be performed in a pipe with a constriction (D) In which there is an increase in temperature
Last Answer : (C) Which can be performed in a pipe with a constriction
Description : Claude's liquefaction process employs the cooling of gases by (A) Expansion in an engine (B) Following a constant pressure cycle (C) Throttling (D) None of these
Last Answer : A) Expansion in an engine
Description : In which process internal energy remains constant ?
Last Answer : Isothermal process.
Description : It is a process during which the pressure remains constant a. Adiabatic b. Isentropic c. Isobaric d. Isotropic
Last Answer : Isobaric
Description : 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
Last Answer : Some heat transfer occurs
Description : A process during which entropy remains constant is called ______ process A. Isometric B. Isochoric C. Isobaric D. Isentropic
Last Answer : Isentropic
Description : What remains constant during a steady-flow process? A. Mass B. Energy content of the control volume C. Temperature D. Mass and energy content of the control volume
Last Answer : Mass and energy content of the control volume
Description : The prefix “iso” used to designate a process means ______. A. Cannot be interchanged B. Remains constant C. Approximately equal D. Slight difference
Last Answer : Remains constant
Description : 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
Last Answer : Isochoric or 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
Description : What is a process during which the temperature remains constant? A. Isobaric process B. Isothermal process C. Isochoric process D. Isometric process
Last Answer : Isothermal process
Description : 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
Last Answer : Answer: A
Description : The entropy __________ in an irreversible cyclic process. A. remains constant B. decreases C. increases
Last Answer : Answer: C
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.
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
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.
Description : Wet steam at 1 MPa flowing through a pipe is throttled to a pressure of 0.1 MPa. If the throttling temperature is110°C, What is the quality of the steam in the pipe? a) 96% b) 86% c) 76% d) 66%
Last Answer : 96%
Description : The greater the pressure difference in throttling, the lesser is the irreversibility. A. Yes B. No
Last Answer : Answer: B
Description : In STL files when chord length decrease then accuracy _______ a.increase b.decrease c.may increase or may decrease d.remains constant
Last Answer : a.increase
Description : The degree of the B-spline with varying knot vectors a.Increases with knot vectors b.Decreases with knot vectors c.Remains constant d.none of the above
Last Answer : a.Increases with knot vectors
Description : During planetary motion which of the following remains constant? a.Augular speed b.Linear velocity c.Angular acceleration d.Total angular momentum e.All of the above
Last Answer : b. Linear velocity
Description : In planetary motion a.The total angular momentum remains constant b.The total linear momentum remains constant c.The total linear momentum is zero d.The total angular momentum is zero e.None of the above
Last Answer : a. The total angular momentum remains constant
Description : The tension in the wire rope supporting a lift moving with a uniform velocity a.Is more when the lift is moving upwards b.Is more when the lift is moving downwards c.Is less when the lift ... down-wards d.Is less when the lift is moving upwards e.Remains constant irrespective of the lift movement
Last Answer : e. Remains constant irrespective of the lift movement
Description : During adiabatic expansion of gas (A) Pressure remains constant (B) Pressure is increased (C) Temperature remains constant (D) None of these
Last Answer : (D) None of these
Description : An ideal gas is compressed in a cylinder so well insulated that there is essentially no heat transfer. The temperature of gas a. Remains constant b. increases c. decreases d. is basically zero
Last Answer : increases
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
Description : _____ is that property of a substance which remains constant if no heat enters or leaves the substance, while it does work or alters its volume, but which increases or diminishes should a small amount of heat enter or leave. a. Entrophy b. Enthalpy c. Specific Heat d. None of the above
Last Answer : Entrophy
Description : Heat cannot be created, nor destroyed, but it can be changed from one form to another. The energy in the universe remains constant. a. 1st Law of Energy Conservation b. 2nd Law of Energy Conservation c. 3rd Law of Energy Conservation d. None of the above
Last Answer : 1st Law of Energy Conservation
Description : A certain gas, with cp = 0.529Btu/ lb. °Rand R = 96.2ft.lb/lb. °R, expands from 5 cu ft and 80°F to 15 cu ft while the pressure remains constant at 15.5psia. Compute for T2. a.1520°R b. 1620°R c. 1720°R d. 1820°R formula: T2= T1V2/V1
Last Answer : 1620°R
Description : A certain gas with cp = 0.529Btu/lb°R and R = 96.2ft/lbºR expands from 5 ft and 80ºF to 15 ft while the pressure remains constant at 15.5 psia. a. T2=1.620ºR, ∫H = 122.83 Btu b. T2 = 2°R, ∫H = 122.83 Btu c. ... , ∫H = 122.83 Btu d. T2 = 1°R, ∫H = 122.83 Btu T2= V2(t2)/V1 and ∫H = mcp (T2-T1)
Last Answer : T2=1.620ºR, ∫H = 122.83 Btu
Description : A certain gas, with cp = 0.529Btu/lb.°R and R = 96.2 ft.lb/lb.°R, expands from 5 cu ft and 80°F to 15 cu ft while the pressure remains constant at 15.5 psia. Compute for T2. (Formula: T2= T1V2/V1) a. 460°R b. 270°R c. 1620 °R d. None of the above
Last Answer : 1620 °R
Description : On a day when the partial pressure of water vapor remains constant, what happens as the temperature rises? a. the relative humidity increases b. the relative humidity decreases c. the relative humidity remains constant d. the air would eventually become saturated
Last Answer : the relative humidity decreases
Description : The volume of a given amount of water _________ as the temperature decreases from 4˚C to 0˚C. a. decreases b. increases c. remains constant d. none of the above
Description : 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 Charles’ law. A. Yes B. No