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Engineering Thermodynamics
Quiz 11
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Q.1
When a system changes its state from one equilibrium state to another equilibrium state, then the path of successive states through which the system has passed, is known as
Thermodynamic law
Thermodynamic process
Thermodynamic cycle
None of these
Q.2
A cycle consisting of two isothermal and two isentropic processes, is known as
Carnot cycle
Stirling cycle
Ericsson cycle
Joule cycle
Q.3
Barometric pressure is equal to
760 mm Hg
Zero mm Hg
735.6 mm Hg
1 mm Hg
Q.4
Specific heat of air at constant pressure is equal to
0.17
0.21
0.24
1.0
Q.5
One barometric pressure or 1 atmospheric pressure is equal to
1 kgf/cm²
1.033 kgf/cm²
0 kgf/cm²
1.0197 kgf/cm²
Q.6
The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant)
Ru × T
1.5 Ru × T
2 Ru × T
3 Ru × T
Q.7
The general law for the expansion or compression of gases, is
pv = C
pv = m R T
pvn = C
pvγ = C
Q.8
In an isothermal process
There is no change in enthalpy
There is no change in internal energy
There is no change in temperature
All of these
Q.9
Temperature of a gas is produced due to
Its heating value
Kinetic energy of molecules
Repulsion of molecules
Surface tension of molecules
Q.10
Kinetic energy of the molecules in terms of absolute temperature (T) is proportional to
T
J
J²
Vr
Q.11
The hyperbolic process is governed by
Avogadro's law
Boyle's law
Charles' law
Gay-Lussac law
Q.12
A cycle consisting of __________ and two isothermal processes is known as Stirling cycle.
Two constant pressure
Two constant volume
Two isentropic
One constant pressure, one constant volume
Q.13
A cycle consisting of _________ and two isothermal processes is known as Stirling cycle.
Two isentropic
One constant pressure, one constant volume
Two constant volumes
Two constant pressures
Q.14
The behavior of a perfect gas, undergoing any change in the variables which control physical properties, is governed by
Boyle's law
Gay-Lussac law
Charles' law
All of these
Q.15
An isothermal process is governed by
Gay-Lussac law
Charles' law
Boyle's law
Avogadro's law
Q.16
Kelvin Planck's law deals with
Conservation of heat
Conservation of work
Conversion of heat into work
Conversion of work into heat
Q.17
Kelvin-Planck's law deals with
Conservation of work
Conservation of heat
Conversion of heat into work
Conversion of work into heat
Q.18
The total energy of a molecule is shared equally by the various degrees of freedom possessed by it. This law is known as
Law of equipartition of energy
Law of degradation of energy
Law of conservation of energy
None of these
Q.19
Intensive property of a system is one whose value
Depends on the mass of the system, like volume
Does not depend on the mass of the system, like temperature, pressure, etc.
Is not dependent on the path followed but on the state
Is dependent on the path followed and not on the state
Q.20
The efficiency and work ratio of a simple gas turbine cycle are
Very low
Low
High
Very high
Q.21
Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure
Enthalpy
Volume
Mass
Entropy
Q.22
Extensive property of a system is one whose value
Depends on the mass of the system like volume
Does not depend on the mass of the system, like temperature, pressure, etc.
Is not dependent on the path followed but on the state
Is dependent on the path followed and not on the state
Q.23
Which of the following quantities is not the property of the system?
Pressure
Temperature
Specific volume
Heat
Q.24
Carnot cycle has maximum efficiency for
Reversible engine
Irreversible engine
Petrol engine
Diesel engine
Q.25
Compressed air coming out from a punctured football
Becomes hotter
Becomes cooler
Remains at the same temperature
May become hotter or cooler depending upon the humidity of the surrounding air
Q.26
One kg of carbon monoxide requires _________kg of oxygen to produce 11/7 kg of carbon dioxide gas.
11/7
9/7
4/7
All of the above
Q.27
The heating of a gas at constant pressure is governed by
Boyle's law
Charles' law
Gay-Lussac law
Avogadro's law
Q.28
Which of the following cycles is not a reversible cycle?
Carnot
Ericsson
Stirling
None of the above
Q.29
Which of the following is an irreversible cycle?
Carnot
Stirling
Ericsson
None of the above
Q.30
One reversible heat engine operates between 1600 K and T2 K and another reversible heat engine operates between T2 K and 400 K. If both the engines have the same heat input and output, then temperature T2 is equal to
800 K
1000 K
1200 K
1400 K
0 h : 0 m : 1 s
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