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This set of Engineering Thermodynamics Multiple Choice Questions & Answers (MCQs) focuses on Engineering Thermodynamics Set 12
Q1 | At a pressure below the triple point line,
- the substance cannot exist in the liquid phase
- the substance when heated transforms from solid to vapour
- both of the mentioned
- none of the mentioned
Q2 | Which of the following statement is true?
- to the left of saturated solid line is the solid region
- between saturated solid line and saturated liquid line with respect to solidification there exists the solid-liquid mixture region
- between two saturated liquid lines is the compressed liquid region
- all of the mentioned
Q3 | The greater the temperature, the is the vapour pressure.
- lower
- higher
- depends on the substance
- none of the mentioned
Q4 | Phase change occurs at
- constant pressure
- constant temperature
- constant pressure and temperature
- none of the mentioned
Q5 | Which of the following statement is true?
- saturation temperature is a function of pressure
- saturation pressure is a function of temperature
- both of the mentioned
- none of the mentioned
Q6 | At absolute zero, an isotherm and an adiabatic are identical.
- true
- false
Q7 | When the heat transferred isothermally
- doesnot, can, without
- exists, cannot, without
- exists, can, with
- none of the mentioned
Q8 | First law of thermodynamics deals with
- conservation of mass
- conservation of momentum
- conservation of energy
- conservation of pressure
Q9 | During a fluid flow, the temperature is developed due to
- increase in density
- change in pressure
- translational kinetic energy
- fluid level
Q10 | The equation for the average kinetic energy is
- 0.5 kt
- 1.5 kt
- 2.5 kt
- 3.5 kt
Q11 | Entropy occurs due to
- change in macroscopic variables
- volumetric changes only
- mass changes only
- temperature only
Q12 | What is the equation of entropy?
- ratio of reversible transfer of heat to absolute temperature
- ratio of absolute temperature to reversible heat transfer
- ratio of adiabatic heat to macroscopic variables
- ratio of macroscopic variables to adiabatic heat
Q13 | SI unit of enthalpy is
- joule/kgk
- joule/k
- joule/kg
- k/kg
Q14 | Which among this is not an exothermic reaction?
- combustion reaction
- neutralization reaction
- thermite reaction
- evaporating liquid water
Q15 | What reaction takes place during photosynthesis?
- exothermic reaction
- endothermic reaction
- redox reaction
- combustion reaction
Q16 | The first law of thermodynamics doesn’t tell us whether a thermodynamic process is feasible or not.
- true
- false
Q17 | According to Joule’s experiments,
- heat can be completely converted into work
- work can be completely converted into heat
- both heat and work are completely interchangeable
- all of the mentioned
Q18 | Which of the following is true?
- work is a high grade energy
- heat is a low grade energy
- complete conversion of low grade energy into high grade energy in a cycle is impossible
- all of the mentioned
Q19 | Boiler, turbine, condenser and pump together constitute a heat engine.
- true
- false
Q20 | In a heat engine cycle, which of the following process occurs?
- heat is transferred from furnace to boiler
- work is produced in turbine rotor
- steam is condensed in condenser
- all of the mentioned
Q21 | A thermal energy reservoir is a large body of
- small heat capacity
- large heat capacity
- infinite heat capacity
- none of the mentioned
Q22 | Processes inside a thermal energy reservoir are quasi-static.
- true
- false
Q23 | Carnot cycle is a reversible cycle.
- true
- false
Q24 | Which if the following statements are true for a mechanical energy reservoir(MER)?
- it is a large body enclosed by an adiabatic impermeable wall
- stores work as ke or pe
- all processes within an mer are quasi- static
- all of the mentioned
Q25 | The correct sequence of the processes taking place in a carnot cycle is
- adiabatic -> adiabatic -> isothermal -> isothermal
- adiabatic -> isothermal -> adiabatic -> isothermal
- isothermal -> isothermal -> adiabatic -> adiabatic
- isothermal -> adiabatic -> isothermal -> adiabatic