WorksheetsThermodynamics - Final Examination (Elements) - Part 2
Total questions: 100
Worksheet time: 50mins
Name
Class
Date
1.
A Mollier chart if the thermodynamic properties is shown in which of the following diagrams?
a)
p-h diagram
b)
P-V diagram
c)
T-S diagram
d)
h-S diagram
2.
The following are included in the first law of thermodynamics for closed system EXCEPT:
a)
internal energy
b)
heat transferred in and out of the system
c)
work done by or on the system
d)
kinetic energy
3.
All processes below are irreversible except one. Which one?
a)
Inelastic deformation
b)
Heat conduction
c)
Elastic tension and release of steel bar
d)
Magnetization with hysteresis
4.
The combination of conditions that best describes a thermodynamic process is given by which of the following?
I. Has successive states through which the system passes
II. When reversed leaves no change in the system
III. When reversed leaves no change in the system or the surroundings
IV. States are passes through so quickly that the surroundings do not
a)
I and IV
b)
I only
c)
I and II
d)
I and III
5.
The sum of the energies of all the molecules in a system where energies appear in several complex forms in the:
a)
frictional energy
b)
potential energy
c)
kinetic energy
d)
internal energy
6.
The Carnot refrigeration cycle includes all of the following process except:
a)
isentropic expansion
b)
isenthalpic expansion
c)
isothermal heating
d)
isentropic compression
7.
The maximum possible work that can be obtained a cycle operating between two reservoirs is found from:
a)
availability
b)
Carnot efficiency
c)
process irreversibility
d)
Reversible work
8.
The following factors are necessary to define a thermodynamic cycle except:
a)
the means of doing work on the system
b)
high and low temperature reservoirs
c)
the working substance
d)
the time it takes to complete the cycle
9.
All of the following terms included in the second law for open system except
a)
shaft work
b)
internal energy
c)
flow work
d)
average work
10.
The following terms are included in the first law of thermodynamics for open systems except
a)
magnetic system
b)
work done by or in the system
c)
internal system
d)
heat transferred in and out of the system
11.
The following terms are included in the first law of thermodynamics for closed systems except:
a)
kinetic energy
b)
heat transferred in and out of the system
c)
work done by or on the system
d)
internal energy
12.
Which of the following statements about a path function is not true?
a)
It is dependent on the path between states of thermodynamic equilibrium
b)
It represents values of p, v, t and s between states that are path functions
c)
On a p-v diagram, it can represent work done
d)
On a t-s diagram, it can represent heat transferred
13.
A constant pressure thermodynamic cycle obeys:
a)
Amagat's law
b)
Dalton's law
c)
Boyle's law
d)
Charles' Law
14.
The first and second laws of thermodynamics are:
a)
energy equations
b)
momentum equations
c)
equations of state
d)
continuity equations
15.
Represents the temperature of an ideal gas will attain when it is brought to rest adiabatically.
a)
Absolute zero temperature
b)
Stagnation temperature
c)
Boiling temperature
d)
Critical temperature
16.
Gauge pressure and absolute pressure differ from each other by:
a)
the system units
b)
nothing they mean the same thing
c)
atmospheric pressure
d)
the size of the gauge
17.
Each of the following are correct values of standard atmospheric pressure except:
a)
14.962 psia
b)
1013 mm Hg.
c)
1,000 atm
d)
760 torr
18.
All of the following are properties of an ideal gas except:
a)
temperature
b)
density
c)
pressure
d)
viscosity
19.
Which of the following is not the universal gas constant?
a)
8.314 J/mol.K
b)
1545 ft-lb/lbmol-°R
c)
8314 kJ/mol.K
d)
8.314 kJ/kmol.K
20.
The following are all commonly quoted values of standard temperatures and pressures except:
a)
0°F and 29.92 in Hg
b)
273.15 K and 101.325 kPa
c)
0°C and 760 mm Hg
d)
32°F and 14.696 psia
21.
The variation of pressure in an isobaric process is:
a)
zero
b)
described by the perfect gas law
c)
linear with temperature
d)
inversely proportional to temperature
22.
For fluid flow, the enthalpy is the sum of internal energy and _____.
a)
work flow
b)
pressure
c)
entropy
d)
temperature
23.
A thermodynamic process whose deviation from equilibrium is infinitesimal at all times is _____.
a)
isenthalpic
b)
isentropic
c)
reversible
d)
in quasi equilibrium
24.
Which thermodynamic property best describes the molecular activity of a substance?
a)
Enthalpy
b)
External energy
c)
Entropy
d)
Internal energy
25.
Stagnation enthalpy represents the enthalpy of a fluid when it is brought to rest _____.
a)
isometrically
b)
isothermally
c)
adiabatically
d)
disobarically
26.
During stagnation process, the kinetic energy of a fluid is converted to enthalpy which results in an:
a)
increase in the fluid temperature and pressure
b)
increase in the fluid specific volume
c)
increase in the fluid pressure
d)
increase in the fluid temperature
27.
The properties of fluid at the stagnation in state are called _____.
a)
stagnation state
b)
stagnation vapor
c)
stagnation property
d)
stagnation phase
28.
All of the following are thermodynamic properties except _____.
a)
modulus of Elasticity
b)
temperature
c)
density
d)
pressure
29.
A liquid boils when its vapor pressure equals
a)
the critical pressure
b)
one standard atmosphere
c)
the ambient pressure
d)
the gage pressure
30.
A system composed of ice and water at 0°C is said to be: _____.
a)
in thermodynamic equilibrium
b)
in thermal equilibrium
c)
a multiphase material
d)
all of the above
31.
The heat of fusion of a pure substance is:
a)
the energy required to melt the substance
b)
the energy released in a chemical reaction
c)
the change in phase from solid to gas
d)
the change in phase from liquid to gas
32.
The heat of vaporization involves the change in enthalpy due to:
a)
the energy released in a chemical reaction
b)
the change in phase from solid to liquid
c)
the change in phase is from solid to gas
d)
the change in phase from liquid to gas
33.
The heat of sublimation involves the change in enthalpy due to _____.
a)
the change in phase from solid to gas
b)
the change in phase from liquid to gas
c)
the energy released in a chemical reaction
d)
the change in phase from solid to liquid
34.
A specific property
a)
is independent of mass
b)
is dependent of the phase of the substance
c)
defines a specific variable (e.g., temperature)
d)
is an extensive property multiplied by mass
35.
A material's specific heat can be defined as
a)
the ratio of heat required to change the temperature of mass by a change in temperature
b)
being different for constant pressure and constant temperature processes
c)
all of these
d)
a function of temperature
36.
If a substance temperature is less than its saturation temperature, the substance is:
a)
subcooled liquid
b)
saturated vapor
c)
wet vapor
d)
superheated vapor
37.
If a substance temperature is equal to its saturation temperature, the substance is a _____.
a)
subcooled liquid
b)
superheated vapor
c)
saturated liquid and vapor
d)
wet vapor
38.
If a substance's temperature is greater than its saturation temperature, the substance is a _____.
a)
subcooled liquid
b)
wet vapor
c)
saturated vapor
d)
superheated vapor
39.
Critical properties refer to
a)
extremely important properties, such as temperature and pressure
b)
heat required for phase change and important for energy production
c)
property values where liquid and gas phase are indistinguishable
d)
properties having to do with equilibrium conditions, such as the Gibbs and Helmholtz functions
40.
For a saturated vapor, the relationship between temperature and pressure is given by:
a)
the perfect gas law
b)
Van der Waal's equation
c)
a Viral equation of state
d)
a steam table
41.
Properties of a superheated vapor are given by
a)
a Viral equation of state
b)
a one to one relationship, such as the properties of saturated steam
c)
a superheated table
d)
the perfect gas law
42.
Properties of non-reacting gas mixtures are given by:
a)
volumetric weighting for molecular weight and density and geometric weighting for all other properties except entropy
b)
volumetric weighting
c)
geometric weighting
d)
arithmetic average
43.
The relationship between the total volume of a mixture of non-reacting gases and their partial volume is given by:
a)
Dalton's law
b)
gravimetric fractions
c)
Amagat's Law
d)
mole fractions
44.
The relationship between the total pressure of a mixture of non-reacting gases and the partial pressures of constituents is given by:
a)
mole fractions
b)
Dalton's Law
c)
gravimetric fractions
d)
volumetric fractions
45.
Which of the following is the best definition of enthalpy?
a)
The heat required to cause a complete conversion between two phases at a constant temperature
b)
The amount of useful energy in a system
c)
The amount of energy no longer available to the system
d)
The ratio of heat added to the temperature increases in a system
46.
Which of the following statements is not true for real gases?
a)
Real gases are found only rarely in nature
b)
Real gases are subjected to attractive forces between molecules (e.g., Van der Waal's forces)
c)
Molecules occupy a volume not negligible in comparison to the total volume of gas
d)
The law of corresponding states may be used for real gases
47.
The stagnation state is called the isentropic stagnation state when the stagnation process is:
a)
reversible as well dynamic
b)
isotropic
c)
adiabatic
d)
reversible as well as adiabatic
48.
The entropy of a fluid remains constant during what process?
a)
isentropic stagnation process
b)
combustion process
c)
unsteady stagnation process
d)
polytropic stagnation process
49.
All of the following processes are irreversible except
a)
stirring of a viscous fluid
b)
an unrestrained expansion of a gas
c)
phase changes
d)
an isentropic deceleration of a moving perfect fluid
50.
All of the following processes are irreversible except:
a)
chemical reactions
b)
current flow through an electrical resistance
c)
an isentropic compression of a perfect gas
d)
diffusion
51.
All of the following processes are irreversible except:
a)
heat conduction
b)
inelastic deformation
c)
magnetization with hysteresis
d)
elastic tension and release of steel bar
52.
Which of the following state(s) is/are necessary for a system to be in thermodynamic equilibrium?
a)
Thermal equilibrium
b)
Chemical, mechanical, and thermal equilibrium
c)
Chemical equilibrium
d)
Mechanical equilibrium
53.
Adiabatic heat transfer within a vapor cycle refers to:
a)
heat transfer that is reversible but not isentropic
b)
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
c)
heat transfer that is atmospheric but not reversible
d)
there is no such thing as adiabatic heat transfer
54.
Which of the following gives polytropic under n?
a)
log (V₁/V₂) / log (P₂/P₁)
b)
log (V₁/V₂) / log (P₁/P₂)
c)
log (P₁/P₂) / log (V₁/V₂)
d)
log (P₂/P₁) / log (V₁/V₂)
55.
The work done in an adiabatic process in a system:
a)
is equal to the change in total energy of closed system plus net heat transfer
b)
is equal to the change in total energy in a closed system
c)
is equal to the total net heat transfer plus the entropy change
d)
is equal to the change in total energy of closed system plus entropy change
56.
Based on the first law of thermodynamics, which of the following is wrong?
a)
The net heat transfer equals the energy change if no work is done
b)
The net heat transfer equal the net work of the cycle
c)
The heat transfer cannot exceed the work done
d)
The heat transfer equals the work plus energy change
57.
Assuming real processes, the net entropy change in the universe:
a)
is positive
b)
must be calculated
c)
is negative
d)
equals zero
58.
Which of the following types of flowmeters is most accurate?
a)
Foam type
b)
Pitot tube
c)
Venturi tube
d)
Flow nozzle
59.
What is referred by control volume?
a)
Closed system
b)
An isolated system
c)
Reversible process only
d)
Fixed region in space
60.
What is the most efficient thermodynamics cycle?
a)
Brayton
b)
Carnot
c)
Rankine
d)
Diesel
61.
How do you treat a statement that is considered a scientific law?
a)
Believe to be derived from mathematical theorem
b)
We generally observed to be true
c)
Accept as a summary of experimental observation
d)
We postulate to be true
62.
An instrument commonly used in most research and engineering laboratories because it is small and fast among the other thermometers.
a)
Thermocouple
b)
Liquid-in-glass thermometer
c)
Mercury thermometer
d)
Gas thermometer
63.
In an actual gases, the molecular collisions are
a)
inplastic
b)
elastic
c)
plastic
d)
inelastic
64.
Which of the following is used in thermal power plant?
a)
Otto
b)
Brayton
c)
Reversed Carnot
d)
Rankine
65.
The elongation and compression of a helical spring is an example of
a)
adiabatic process
b)
reversible process
c)
irreversible process
d)
isothermal process
66.
Otto cycle consists of
a)
Two isothermal and two constant volume processes
b)
Two adiabatic and two isothermal processes
c)
Two isentropic and two constant pressure processes
d)
Two isentropic and two constant volume processes
67.
Brayton cycle has
a)
Two isentropic and two constant pressure processes
b)
Two isothermal, one constant volume and one constant pressure processes
c)
Two isentropic and two constant volume processes
d)
One constant pressure, one constant volume and two adiabatic processes
68.
A Bell-Coleman cycle is reversed
a)
Stirling cycle
b)
Carnot cycle
c)
Joule cycle
d)
Otto cycle
69.
A steam nozzle changes
a)
kinetic energy into heat energy
b)
heat energy into kinetic energy
c)
heat energy into potential energy
d)
potential energy into heat energy
70.
The pitot tube is a device used for measurement of
a)
velocity
b)
pressure
c)
flow
d)
discharge
71.
The continuity equation is applicable to
a)
Compressibility of fluids
b)
Conservation of mass
c)
Viscous, unviscous fluids
d)
Steady, unsteady flow
72.
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:
a)
RL = 2MV
b)
RL = 1/2 MV
c)
RL = 2MV²
d)
RL = 1/2 MV²
73.
Gas being heated at constant volume is undergoing the process of:
a)
isobaric
b)
adiabatic
c)
isentropic
d)
isometric
74.
Dew point is defined as
a)
The temperature which dew is formed in the air
b)
The temperature to which the air must be cooled at constant pressure to produce saturation
c)
The point where the pressure and temperature lines meet
d)
The pressure which dew is formed in the air
75.
What do you call the changing of an atom of element into an atom of a different element with a different atomic mass?
a)
Atomic pile
b)
atomic transmutation
c)
Atomic energy
d)
Atomization
76.
What do you call the weight of the column of air above the earth's surface?
a)
Air pressure
b)
Wind pressure
c)
Aerostatic pressure
d)
atmospheric pressure
77.
What keeps the moisture from passing through the system?
a)
Trap
b)
Aerator
c)
Humidifier
d)
Dehydrator
78.
What condition exists in an adiabatic throttling process?
a)
Specific volume is constant
b)
Enthalpy is variable
c)
Enthalpy is constant
d)
Entropy is constant
79.
The specific gravity of a substance is the ratio of its density to the density of:
a)
gas
b)
air
c)
water
d)
mercury
80.
A compound pressure gauge is used to measure:
a)
compound pressure
b)
complex pressure
c)
positive and negative pressures
d)
variable pressure
81.
Isentropic flow is
a)
frictionless reversible flow
b)
reversible adiabatic flow
c)
perfect gas law
d)
ideal fluid flow
82.
Under ideal conditions, isothermal, isobaric, isochoric, and adiabatic processes are:
a)
quasi-static processes
b)
dynamic processes
c)
stable processes
d)
static processes
83.
One watt is:
a)
1 N.m/s
b)
1 N.m/min
c)
1 kN.m/s
d)
1 N.m/hr
84.
A temperature above which a given gas cannot be liquified:
a)
Vaporization temperature
b)
Cryogenic temperature
c)
Critical temperature
d)
Absolute temperature
85.
The effectiveness of a body as a thermal radiator at a given temperature
a)
Conductivity
b)
Emissivity
c)
Absorptivity
d)
Reflectivity
86.
Which of the following occurs in a reversible polytropic process?
a)
Entropy remains constant
b)
Internal energy does not change
c)
Some heat transfer occurs
d)
Enthalpy remains constant
87.
The instrument used to measure atmospheric pressure is:
a)
Venturi
b)
Manometer
c)
Barometer
d)
Rotameter
88.
A pneumatic tool is generally powered by
a)
electricity
b)
air
c)
water
d)
steam
89.
Which of the following gases can be used to measure the lowest temperature?
a)
Nitrogen
b)
Hydrogen
c)
Oxygen
d)
Helium
90.
The triple point of a substance is the temperature and pressure at which
a)
The solid, liquid and gaseous phases are in equilibrium
b)
The solid and liquid phases are in equilibrium
c)
The solid and gaseous phases are in equilibrium
d)
The solid does not melt, the liquid does not boil and the gas does not condense
91.
Which of the following relations is not applicable in a free expansion process?
a)
Change temperature is zero
b)
Heat rejected is zero
c)
Heat supplied is zero
d)
Work done is zero
92.
Ericsson cycle has
a)
Two adiabatic, one constant volume and constant pressure process
b)
Two isothermal and two constant entropy processes
c)
Two isothermal and two constant volume processes
d)
Two isothermal and two constant pressure processes
93.
A Stirling cycle has
a)
Two isothermal and two constant volume processes
b)
Two adiabatic and two constant volume processes
c)
Two isothermal and two constant pressure processes
d)
Two adiabatic and two constant pressure processes
94.
The temperature of the fluid flowing under pressure through a pipe is usually measure by:
a)
all of the above
b)
a thermocouple
c)
a glass thermometer
d)
an electric resistance thermometer
95.
Specific heat capacity is an SI derived unit described as
a)
W/mK
b)
J/kg
c)
kJ/kgK
d)
J/m
96.
Which of the following is mathematically a thermodynamic property?
a)
A path function
b)
Exact differential
c)
A point function
d)
Discontinuous
97.
When the expansion or compression of gas takes place "without transfer of heat" to or from the gas, the process is called:
a)
reversible
b)
isothermal
c)
adiabatic
d)
polytropic
98.
Another name for the liquid valve is the:
a)
Shut-off valve
b)
Freon valve
c)
Master valve
d)
King valve
99.
A liquid whose temperature is lower than the saturation temperature corresponding to the existing pressure:
a)
Subcooled liquid
b)
Compressed liquid
c)
Saturated liquid
d)
Pure liquid
100.
The law that states "Entropy of all perfect crystalline solids is zero at absolute zero temperature:
a)
Third law of thermodynamics
b)
Second law of thermodynamics
c)
Zeroth law of thermodynamics
d)
First law of thermodynamics
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