PRIME’s | Elements in PIPE | Chapter 1 – Thermodynamics | Part 06 of 07

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Question 1 of 50

1. Question

All of the following processes are irreversible except:

heat conduction
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inelastic deformation
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magnetization with hysteresis
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elastic tension and release of steel bar
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Question 2 of 50

2. Question

Which of the following state(s) is/are necessary for a system to be in thermodynamic equilibrium?

Thermal equilibrium
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Chemical, mechanical, and thermal equilibrium
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Chemical equilibrium
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Mechanical equilibrium
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Question 3 of 50

3. Question

Adiabatic heat transfer within a vapor cycle refers to:

heat transfer that is reversible but not isentropic
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the transfer of energy from one stream to another in a heat exchanger so that the energy of the input streams equals the energy of the output streams
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heat transfer that is atmospheric but not reversible
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there is no such thing as adiabatic heat transfer
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Question 4 of 50

4. Question

Which of the following gives polytropic under n?

log (V₁/V₂) / log (P₂/P₁)
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log (V₁/V₂) / log (P₁/P₂)
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log (P₁/P₂) / log (V₁/V₂)
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log (P₂/P₁) / log (V₁/V₂)
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Question 5 of 50

5. Question

The work done in an adiabatic process in a system:

is equal to the change in total energy of closed system plus net heat transfer
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is equal to the change in total energy in a closed system
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is equal to the total net heat transfer plus the entropy change
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is equal to the change in total energy of closed system plus entropy change
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Question 6 of 50

6. Question

Based on the first law of thermodynamics, which of the following is wrong?

The net heat transfer equals the energy change if no work is done
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The net heat transfer equal the net work of the cycle
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The heat transfer cannot exceed the work done
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The heat transfer equals the work plus energy change
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Question 7 of 50

7. Question

Assuming real processes, the net entropy change in the universe:

is positive
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must be calculated
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is negative
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equals zero
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Question 8 of 50

8. Question

Which of the following types of flowmeters is most accurate?

Foam type
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Pitot tube
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Venturi tube
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Flow nozzle
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Question 9 of 50

9. Question

What is referred by control volume?

Closed system
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An isolated system
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Reversible process only
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Fixed region in space
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Question 10 of 50

10. Question

What is the most efficient thermodynamics cycle?

Brayton
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Carnot
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Rankine
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Diesel
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Question 11 of 50

11. Question

How do you treat a statement that is considered a scientific law?

Believe to be derived from mathematical theorem
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We generally observed to be true
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Accept as a summary of experimental observation
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We postulate to be true
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Question 12 of 50

12. Question

An instrument commonly used in most research and engineering laboratories because it is small and fast among the other thermometers.

Thermocouple
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Liquid-in-glass thermometer
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Mercury thermometer
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Gas thermometer
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Question 13 of 50

13. Question

In an actual gases, the molecular collisions are

inplastic
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elastic
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plastic
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inelastic
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Question 14 of 50

14. Question

Which of the following is used in thermal power plant?

Otto
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Brayton
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Reversed Carnot
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Rankine
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Question 15 of 50

15. Question

The elongation and compression of a helical spring is an example of

adiabatic process
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reversible process
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irreversible process
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isothermal process
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Question 16 of 50

16. Question

Otto cycle consists of

Two isothermal and two constant volume processes
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Two adiabatic and two isothermal processes
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Two isentropic and two constant pressure processes
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Two isentropic and two constant volume processes
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Question 17 of 50

17. Question

Brayton cycle has

Two isentropic and two constant pressure processes
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Two isothermal, one constant volume and one constant pressure processes
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Two isentropic and two constant volume processes
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One constant pressure, one constant volume and two adiabatic processes
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Question 18 of 50

18. Question

A Bell-Coleman cycle is reversed

Stirling cycle
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Carnot cycle
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Joule cycle
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Otto cycle
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Question 19 of 50

19. Question

A steam nozzle changes

kinetic energy into heat energy
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heat energy into kinetic energy
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heat energy into potential energy
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potential energy into heat energy
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Question 20 of 50

20. Question

The pitot tube is a device used for measurement of

velocity
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pressure
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flow
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discharge
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Question 21 of 50

21. Question

The continuity equation is applicable to

Compressibility of fluids
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Conservation of mass
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Viscous, unviscous fluids
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Steady, unsteady flow
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Question 22 of 50

22. Question

The work done by a force of R newtons moving in a distance of L meters is converted entirely into kinetic energy and expressed by the equation:

RL = 2MV
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RL = 1/2 MV
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RL = 2MV²
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RL = 1/2 MV²
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Question 23 of 50

23. Question

Gas being heated at constant volume is undergoing the process of:

isobaric
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adiabatic
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isentropic
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isometric
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Question 24 of 50

24. Question

Dew point is defined as

The temperature which dew is formed in the air
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The temperature to which the air must be cooled at constant pressure to produce saturation
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The point where the pressure and temperature lines meet
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The pressure which dew is formed in the air
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Question 25 of 50

25. Question

What do you call the changing of an atom of element into an atom of a different element with a different atomic mass?

Atomic pile
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atomic transmutation
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Atomic energy
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Atomization
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Question 26 of 50

26. Question

What do you call the weight of the column of air above the earth’s surface?

Air pressure
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Wind pressure
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Aerostatic pressure
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atmospheric pressure
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Question 27 of 50

27. Question

What keeps the moisture from passing through the system?

Trap
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Aerator
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Humidifier
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Dehydrator
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Question 28 of 50

28. Question

What condition exists in an adiabatic throttling process?

Specific volume is constant
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Enthalpy is variable
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Enthalpy is constant
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Entropy is constant
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Question 29 of 50

29. Question

The specific gravity of a substance is the ratio of its density to the density of:

gas
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air
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water
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mercury
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Question 30 of 50

30. Question

A compound pressure gauge is used to measure:

compound pressure
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complex pressure
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positive and negative pressures
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variable pressure
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Question 31 of 50

31. Question

Isentropic flow is

frictionless reversible flow
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reversible adiabatic flow
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perfect gas law
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ideal fluid flow
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Question 32 of 50

32. Question

Under ideal conditions, isothermal, isobaric, isochoric, and adiabatic processes are:

quasi-static processes
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dynamic processes
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stable processes
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static processes
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Question 33 of 50

33. Question

One watt is:

1 N.m/s
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1 N.m/min
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1 kN.m/s
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1 N.m/hr
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Question 34 of 50

34. Question

A temperature above which a given gas cannot be liquified:

Vaporization temperature
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Cryogenic temperature
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Critical temperature
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Absolute temperature
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Question 35 of 50

35. Question

The effectiveness of a body as a thermal radiator at a given temperature

Conductivity
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Emissivity
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Absorptivity
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Reflectivity
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Question 36 of 50

36. Question

Which of the following occurs in a reversible polytropic process?

Entropy remains constant
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Internal energy does not change
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Some heat transfer occurs
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Enthalpy remains constant
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Question 37 of 50

37. Question

The instrument used to measure atmospheric pressure is:

Venturi
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Manometer
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Barometer
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Rotameter
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Question 38 of 50

38. Question

A pneumatic tool is generally powered by

electricity
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air
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water
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steam
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Question 39 of 50

39. Question

Which of the following gases can be used to measure the lowest temperature?

Nitrogen
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Hydrogen
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Oxygen
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Helium
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Question 40 of 50

40. Question

The triple point of a substance is the temperature and pressure at which

The solid, liquid and gaseous phases are in equilibrium
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The solid and liquid phases are in equilibrium
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The solid and gaseous phases are in equilibrium
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The solid does not melt, the liquid does not boil and the gas does not condense
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Question 41 of 50

41. Question

Which of the following relations is not applicable in a free expansion process?

Change temperature is zero
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Heat rejected is zero
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Heat supplied is zero
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Work done is zero
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Question 42 of 50

42. Question

Ericsson cycle has

Two adiabatic, one constant volume and constant pressure process
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Two isothermal and two constant entropy processes
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Two isothermal and two constant volume processes
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Two isothermal and two constant pressure processes
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Question 43 of 50

43. Question

A Stirling cycle has

Two isothermal and two constant volume processes
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Two adiabatic and two constant volume processes
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Two isothermal and two constant pressure processes
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Two adiabatic and two constant pressure processes
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Question 44 of 50

44. Question

The temperature of the fluid flowing under pressure through a pipe is usually measure by:

all of these
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a thermocouple
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a glass thermometer
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an electric resistance thermometer
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Question 45 of 50

45. Question

Specific heat capacity is an SI derived unit described as

W/mK
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J/kg
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kJ/kgK
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J/m
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Question 46 of 50

46. Question

Which of the following is mathematically a thermodynamic property?

A path function
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Exact differential
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A point function
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Discontinuous
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Question 47 of 50

47. Question

When the expansion or compression of gas takes place “without transfer of heat” to or from the gas, the process is called:

reversible
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isothermal
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adiabatic
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polytropic
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Question 48 of 50

48. Question

Another name for the liquid valve is the:

Shut-off valve
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Freon valve
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Master valve
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King valve
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Question 49 of 50

49. Question

A liquid whose temperature is lower than the saturation temperature corresponding to the existing pressure:

Subcooled liquid
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Compressed liquid
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Saturated liquid
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Pure liquid
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Question 50 of 50

50. Question

The law that states “Entropy of all perfect crystalline solids is zero at absolute zero temperature:

Third law of thermodynamics
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Second law of thermodynamics
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Zeroth law of thermodynamics
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First law of thermodynamics
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PRIME’s | Elements in PIPE | Chapter 1 – Thermodynamics | Part 06 of 07

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