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This set of Engineering Thermodynamics Multiple Choice Questions & Answers (MCQs) focuses on Engineering Thermodynamics Set 11
Q1 | Irreversibility of a process may be due to
- lack of equilibrium during the process
- involvement of dissipative effects
- both of the mentioned
- none of the mentioned
Q2 | All actual heat transfer processes are
- irreversible
- take place through a finite temperature difference
- both of the mentioned
- none of the mentioned
Q3 | Free expansion is irreversible.
- true
- false
Q4 | Which of the following can be a cause of irreversibility?
- friction, viscosity
- inelasticity
- electrical resistance, magnetic hysteresis
- all of the mentioned
Q5 | The continual motion of a movable device in the complete absence of friction is known as
- pmm2
- pmm3
- pmm1
- pmm0
Q6 | The friction present in moving devices makes a process reversible.
- true
- false
Q7 | Which of the following is irreversible?
- stirring work
- friction work in moving devices
- current flowing through a wire
- all of the mentioned
Q8 | A process will be reversible if it has
- no dissipative effects
- dissipative effects
- depends on the given conditions
- none of the mentioned
Q9 | Irreversibility can be distinguished in how many types?
- 0
- 1
- 2
- 3
Q10 | Internal irreversibility is caused by
- internal dissipative effects
- friction, turbulence
- electrical resistance, magnetic hysteresis
- all of the mentioned
Q11 | The external irreversibility occurs at the system boundary.
- true
- false
Q12 | Which of the following is true?
- mechanical irreversibility is due to finite pressure gradient
- thermal irreversibility is due to finite temperature gradient
- chemical irreversibility is due to finite concentration gradient
- all of the mentioned
Q13 | The magnitude of mechanical work is the
- product of the force and distance travelled perpendicular to the force
- product of the force and distance travelled parallel to the force
- sum of the force and distance travelled perpendicular to the force
- sum of the force and distance travelled parallel to the force
Q14 | Work done by a system is taken to be
- positive
- negative
- zero
- varies according to situation
Q15 | Work done on a system is taken to be
- positive
- negative
- zero
- varies according to situation
Q16 | Work is a
- point function
- path function
- depends on the state
- none of the mentioned
Q17 | Thermodynamic properties are
- point function
- path function
- depends on the state
- none of the mentioned
Q18 | In the equation dV=(1/p)dW, (1/p) is known as
- volume factor
- pressure factor
- differential factor
- integration factor
Q19 | Cyclic integral of a property is always
- zero
- one
- infinite value
- none of the mentioned
Q20 | Constant pressure process is also known as
- isopiestic process
- isobaric process
- all of the mentioned
- none of the mentioned
Q21 | Work done in a quasi-static process
- depends on the path followed
- independent of the path followed
- depends only on the initial and final states
- none of the mentioned
Q22 | A saturation state is a state from which a change of phase may occur
- without a change of pressure or temperature
- with a change of pressure or temperature
- both of the mentioned
- none of the mentioned
Q23 | In which of the following state does water exist?
- saturated solid state
- saturated liquid state
- saturated vapour state
- all of the mentioned
Q24 | 5 P-V DIAGRAM.
- saturated solid line
- saturated liquid lines
- saturated vapour line
- all of the mentioned
Q25 | The triple point is a line on the p-V diagram, where all the three phases, solid, liquid and gas exist.
- true
- false