Q.1
Heat flow into a system is ____, and heat flow out of the system is ________
  • a) positive, positive
  • b) negative, negative
  • c) negative, positive
  • d) positive, negative
Q.2
Joule was the first to prove that heat is a type of energy, laying the groundwork for the fundamental law of thermodynamics.
  • a) False
  • b) True
Q.3
What does (m*g*z) give?
  • a) macroscopic kinetic energy
  • b) microscopic kinetic energy
  • c) macroscopic potential energy
  • d) microscopic potential energy
Q.4
The enthalpy and internal energy are the function of temperature for
  • a) all gases
  • b) steam
  • c) water
  • d) ideal gas
Q.5
In which of the following systems does mass transfer occur across the system boundary?
  • a) isolated system
  • b) closed system
  • c) open system
  • d) none of the mentioned
Q.6
When more than one fluid stream enters or leaves the control volume, which of the following type of balance is taken?
  • a) mass balance
  • b) energy balance
  • c) mass balance and energy balance
  • d) none of the mentioned
Q.7
Fluid flow through which of the following throttles the flow?
  • a) partially opened valve
  • b) orifice
  • c) porous plug
  • d) all of the mentioned
Q.8
Rate of energy increase within the control volume is given by
  • a) rate of energy inflow * rate of energy outflow
  • b) rate of energy inflow – rate of energy outflow
  • c) rate of energy inflow / rate of energy outflow
  • d) rate of energy inflow + rate of energy outflow
Q.9
Which of the following is true for a discharging tank?
  • a) the process is quasi-static
  • b) the process is adiabatic
  • c) dQ=0
  • d) all of the mentioned
Q.10
A cylinder/piston contains 1kg methane gas atkPa, 20°C. The gas is compressed reversibly to a pressure ofkPa. WHat is the work required if the process is isothermal?
  • a) -116.0 kJ
  • b) -316.0 kJ
  • c) -216.0 kJ
  • d) -416.0 kJ
Q.11
Which of the following statements are true for a mechanical energy reservoir(MER)?
  • a) all processes within an MER are quasi-static
  • b) it is a large body enclosed by an adiabatic impermeable wall
  • c) stores work as KE or PE
  • d) all of the mentioned
Q.12
Which of the following is true according to Clausius statement?
  • a) it is possible to construct a device that can transfer heat from a cooler body to a hotter body without any effect
  • b) it is impossible to construct a device that can transfer heat from a cooler body to a hotter body without any effect
  • c) it is impossible to construct a device that can transfer heat from a hotter body to a cooler body without any effect
  • d) none of the mentioned
Q.13
What is the relationship between Kelvin-Planck’s and Clausius’ statements?
  • a) violation of one doesn’t violate the other
  • b) not connected to each other
  • c) virtually two parallel statements of the second law
  • d) none of the mentioned
Q.14
Which of the following causes irreversibility?
  • a) electrical resistance, magnetic hysteresis
  • b) friction, viscosity
  • c) inelasticity
  • d) all of the mentioned
Q.15
The reversed heat engine takes heat from a ___ temperature body, then discharges it to a ___ temperature body and ___ an inward flow of the network.
  • a) high, low, gives
  • b) low, high, gives
  • c) high, low, receives
  • d) low, high, receives
Q.16
If a system undergoes a reversible isothermal process without transfer of heat, the temperature at which this process takes place is called
  • a) triple point of water
  • b) boiling point of water
  • c) absolute zero
  • d) none of the mentioned
Q.17
Which of the following is known as the inequality of Clausius?
  • a) cyclic integral of dW/T<=0
  • b) cyclic integral of dW/T>=0
  • c) cyclic integral of dQ/T>=0
  • d) cyclic integral of dQ/T<=0
Q.18
Which of the following properties describe entropy?
  • a) point function, intensive property
  • b) point function, extensive property
  • c) path function, extensive property
  • d) path function, intensive property
Q.19
Which of the following statement is true?
  • a) for reversible adiabatic process, S=constant
  • b) for reversible isothermal heat transfer, Q=t(Sf-Si)
  • c) both of the mentioned
  • d) none of the mentioned
Q.20
The entropy of an isolated system can never ____
  • a) decrease
  • b) be zero
  • c) increase
  • d) none of the mentioned
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