# Engineering/Engineering Thermodynamics MCQs Sample Test,Sample questions

## Question: ``` If a system undergoes a reversible isothermal process without transfer of heat, the temperature at which this process takes place is called ```

1.triple point of water

2.boiling point of water

3.absolute zero

4.none of the mentioned

## Question: ``` The entropy of any closed system can increase in which of the following way? ```

1.dissipative effects or internal irreversibilities

2.by heat interaction in which there is entropy transfer

3.both of the mentioned

4.none of the mentioned

## Question: ``` Which of the following is true according to Clausius statement? ```

1.it is possible to construct a device that can transfer heat from a cooler body to a hotter body without any effect

2.it is impossible to construct a device that can transfer heat from a cooler body to a hotter body without any effect

3.it is impossible to construct a device that can transfer heat from a hotter body to a cooler body without any effect

4.none of the mentioned

1.119 kPa

2.129 kPa

3.139 kPa

4.149 kPa

1.354.1 kJ/K

2.654.1 kJ/K

3.254.1 kJ/K

4.554.1 kJ/K

1.-116.0 kJ

2.-316.0 kJ

3.-216.0 kJ

4.-416.0 kJ

1.0.950 kJ/K

2.7.950 kJ/K

3.3.950 kJ/K

4.5.950 kJ/K

1.2020 N

2.2030 N

3.2040 N

4.2050 N

1.60.4 kJ

2.-50.4 kJ

3.80.4 kJ

4.-80.4 kJ

## Question: ```A refrigerator with a 2 kW motor for powering the compressor gives 6000 kJ of cooling to the refrigerated space during 30 minutes of operation in a thermally insulated kitchen. Calculate the change in internal energy of the kitchen if the condenser coil behind the refrigerator rejects 8000 kJ of heat to the kitchen over the same time period. ```

1.3600 kJ

2.2400 kJ

3.4800 kJ

4.none of the mentioned

1.431.3 kPa

2.231.3 kPa

3.831.3 kPa

4.131.3 kPa

1.15.8Â°C

2.16.8Â°C

3.18.8Â°C

4.19.8Â°C

## Question: ```Fluid flow through which of the following throttles the flow? ```

1.partially opened valve

2.orifice

3.porous plug

4.all of the mentioned

## Question: ```Heat does not spontaneously flow from a colder body to a hotter one. Which of the following thermodynamics law states this? ```

1.Zeroth law of thermodynamics

2.First law of thermodynamics

3.Second law of thermodynamics

4.Third law of thermodynamics

## Question: ```Heat flow into a system is ____, and heat flow out of the system is ________ ```

1.positive, positive

2.negative, negative

3.negative, positive

4.positive, negative

1.218kPa

2.168kPa

3.198kPa

4.318kPa

## Question: ```If heat Q flows reversibly from the system to the surroundings at To, what will be the effect on entropy? ```

1.entropy of the system is reduced by Q/To

2.system has lost entropy to the surroundings

3.entropy increase of the surroundings is Q/To

4.all of the mentioned

## Question: ```In which of the following systems does mass transfer occur across the system boundary? ```

1.isolated system

2.closed system

3.open system

4.none of the mentioned

1.False

2.True

## Question: ```Rate of energy increase within the control volume is given by ```

1.rate of energy inflow * rate of energy outflow

2.rate of energy inflow â€“ rate of energy outflow

3.rate of energy inflow / rate of energy outflow

4.rate of energy inflow + rate of energy outflow

## Question: ```The available energy of a system ___ as its temperature or pressure decreases and approaches that of the surroundings. ```

1.remains constant

2.increases

3.decreases

4.none of the mentioned

1.all gases

2.steam

3.water

4.ideal gas

## Question: ```The entropy change of a system between two identifiable equilibrium state is ___ when the intervening process is reversible or change of state is irreversible. ```

1.depends on the process

2.different

3.same

4.none of the mentioned

## Question: ```The entropy of an isolated system can never ____ ```

1.decrease

2.be zero

3.increase

4.none of the mentioned

## Question: ```The reversed heat engine takes heat from a ___ temperature body, then discharges it to a ___ temperature body and ___ an inward flow of the network. ```

1.high, low, gives

2.low, high, gives

## Question: ```What does (m*g*z) give? ```

1.macroscopic kinetic energy

2.microscopic kinetic energy

3.macroscopic potential energy

4.microscopic potential energy

## Question: ```What is the magnitude of mechanical work? ```

1.product of the force and distance travelled perpendicular to the force

2.product of the force and distance travelled parallel to the force

3.sum of the force and distance travelled perpendicular to the force

4.sum of the force and distance travelled parallel to the force

## Question: ```What is the relationship between Kelvin-Planckâ€™s and Clausiusâ€™ statements? ```

1.violation of one doesnâ€™t violate the other

2.not connected to each other

3.virtually two parallel statements of the second law

4.none of the mentioned

1.3K

2.0K

3.1K

4.4K

## Question: ```What is thermodynamics? ```

1.study of the relationship between heat and other forms of energy

2.study of the conversion of chemical energy to other forms of energy

3.study of the relationship between mechanical energy to other forms of energy

4.study of the conversion of mechanical energy to other forms of energy

## Question: ```When more than one fluid stream enters or leaves the control volume, which of the following type of balance is taken? ```

1.mass balance

2.energy balance

3.mass balance and energy balance

4.none of the mentioned

## Question: ```When the diver is 8 meters below the surface, the pressure gauge on his air tank reads 60 kPa. The gauge pressure will be 0 at what depth? ```

1.44.118 m

2.24.118 m

3.34.118 m

4.None of the mentioned

## Question: ```When work is dissipated into internal energy, what is the change in the disorderly motion of molecules. ```

1.increases

2.remains the same

3.decreases

4.none of the mentioned

## Question: ```Which of the following causes irreversibility? ```

1.electrical resistance, magnetic hysteresis

2.friction, viscosity

3.inelasticity

4.all of the mentioned

## Question: ```Which of the following follows the Carnot theorem? ```

1.Heat engines

2.Gas turbine engines

3.Gas compressors

4.All of the mentioned

1.IP/BP

2.1/(BP*IP)

3.(BP*IP)

4.BP/IP

## Question: ```Which of the following is a branch of thermodynamics? ```

1.Equilibrium thermodynamics

2.Classical thermodynamics

3.Chemical thermodynamics

4.All of the mentioned

## Question: ```Which of the following is a thermodynamics law? ```

1.Zeroth law of thermodynamics

3.Ideal Gas Law of thermodynamics

4.Boyleâ€™s Law of thermodynamics

## Question: ```Which of the following is a type of thermodynamic system? ```

1.Open system

2.Closed system

3.Thermally isolated system

4.All of the mentioned

## Question: ```Which of the following is an application of thermodynamics? ```

1.Refrigerators

2.Gas compressors

3.Power plants

4.All of the mentioned

## Question: ```Which of the following is an example of low grade energy? ```

1.heat from combustion of fossil fuel

2.heat or thermal energy

3.heat from nuclear fission or fusion

4.all of the mentioned

## Question: ```Which of the following is chosen as the standard thermometric substance? ```

1.Liquid

2.Solid

3.Gas

4.None of the mentioned

## Question: ```Which of the following is known as the inequality of Clausius? ```

1.cyclic integral of dW/T<=0

2.cyclic integral of dW/T>=0

3.cyclic integral of dQ/T>=0

4.cyclic integral of dQ/T<=0

## Question: ```Which of the following is the standard fixed point of thermometry? ```

1.The steam point

2.The triple point of water

3.The ice point

4.All of the mentioned

## Question: ```Which of the following is true for a discharging tank? ```

1.the process is quasi-static

3.dQ=0

4.all of the mentioned

## Question: ```Which of the following occurs without a change in the internal energy? ```

1.Isochoric process

2.Isenthalpic process

4.Isenthalpic process

## Question: ```Which of the following properties describe entropy? ```

1.point function, intensive property

2. point function, extensive property

3.path function, extensive property

4.path function, intensive property

## Question: ```Which of the following statements are true for a mechanical energy reservoir(MER)? ```

1.all processes within an MER are quasi-static

2.it is a large body enclosed by an adiabatic impermeable wall

3.stores work as KE or PE

4.all of the mentioned

## Question: ```Which of the following thermodynamic law gives the concept of enthalpy? ```

1.First law of thermodynamics

2.Second law of thermodynamics

3.Third law of thermodynamics

4.Fourth law of thermodynamics

## Question: ```Which of the following type of motion does Shaft uses to do work? ```

1.vertical motion

2.horizontal motion

3.rotational motion

4.none of the mentioned

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