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Engineering Thermodynamics
Quiz 10
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Q.1
The door of a running refrigerator inside a room was left open. Which of the following statements is correct?
The room will be cooled to the temperature inside the refrigerator
The room will be cooled very slightly
The room will be gradually warmed up
The temperature of the air in room will remain unaffected
Q.2
Which of the following is the extensive property of a thermodynamic system?
Pressure
Volume
Temperature
Density
Q.3
Which of the following is an intensive property of a thermodynamic system?
Mass
Temperature
Energy
Volume
Q.4
According to Avogadro's law, for a given pressure and temperature, each molecule of a gas
Occupies same volume
Occupies volume proportional to its specific weight
Occupies volume inversely proportional to its molecular weight
Occupies volume inversely proportional to its specific weight
Q.5
The energy of molecular motion appears as
Heat
Potential energy
Surface tension
Friction
Q.6
The ultimate analysis of coal consists of the determination of the percentage of
Carbon
Hydrogen and nitrogen
Sulphur and ash
All of these
Q.7
Which of the following is the lightest and most volatile liquid fuel?
Gasoline
Kerosene
Fuel oil
None of these
Q.8
Which of the following gas is mostly used in town for street and domestic lighting and heating?
Mond gas
Coal gas
Producer gas
Coke oven gas
Q.9
According to Avogadro’s law
The product of the gas constant and the molecular mass of an ideal gas is constant
The sum of partial pressure of the mixture of two gases is sum of the two
Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules
All of the above
Q.10
According to Avogadro's law
The product of the gas constant and the molecular mass of an ideal gas is constant
The sum of partial pressure of the mixture of two gases is sum of the two
Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules
All of the above
Q.11
Which of the following is not the intensive property?
Pressure
Temperature
Density
Heat
Q.12
To convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is
Divided by its molecular weight
Multiplied by its molecular weight
Multiplied by its density
Multiplied by its specific weight
Q.13
The __________ is obtained when carbonization of coal is carried out at 500° to 700° C.
Soft coal
Hard coal
Pulverized coal
Bituminous coal
Q.14
When a gas is heated at constant volume
Its temperature will increase
Its pressure will increase
Both temperature and pressure will increase
Neither temperature nor pressure will increase
Q.15
When the gas is heated at constant pressure, the heat supplied
Increases the internal energy of the gas
Increases the temperature of the gas
Does some external work during expansion
Both (B) and (C)
Q.16
When the gas is heated at constant volume, the heat supplied
Increases the internal energy of the gas and increases the temperature of the gas
Does some external work during expansion
Both (A) and (B)
None of these
Q.17
Which of the following gas has a minimum molecular mass?
Nitrogen
Hydrogen
Methane
Oxygen
Q.18
In a reversible adiabatic process, the ratio of T1/T2 is equal to
(p2/p1)γ - 1/ γ
(p1/p2)γ - 1/ γ
(v2/v1)γ - 1/ γ
(v1/v2)γ - 1/ γ
Q.19
The value of specific heat at constant pressure (cp) is __________ that of at constant volume (cv).
Less than
Equal to
More than
None of these
Q.20
Kinetic theory of gases assumes that the collisions between the molecules are
Perfectly elastic
Perfectly inelastic
Partly elastic
Partly inelastic
Q.21
Which of the following gas has a minimum molecular mass?
Oxygen
Nitrogen
Hydrogen
Methane
Q.22
The atomic mass of oxygen is
14
16
18
121
Q.23
For the same compression ratio, the efficiency of dual combustion cycle is
Greater than Diesel cycle and less than Otto cycle
Greater than Diesel cycle
Less than Diesel cycle
Less than Diesel cycle and greater than Otto cycle
Q.24
The processes occurring in open system which permit the transfer of mass to and from the system, are known as
Flow processes
Non-flow processes
Adiabatic processes
None of these
Q.25
The cycle in which heat is supplied at constant volume and rejected at constant pressure is known as
Dual combustion cycle
Diesel cycle
Atkinson cycle
Rankine cycle
Q.26
A heat exchange process in which the product of pressure and volume remains constant is known as
Heat exchange process
Throttling process
Isentropic process
Hyperbolic process
Q.27
Work done in an adiabatic process between a given pair of end states depends on
The end states only
Particular adiabatic process
The value of index ‘n’
The value of heat transferred
Q.28
The heating of gas at constant volume is governed by
Boyle's law
Charles' law
Gay-Lussac law
Avogadro's law
Q.29
Steam coal is a
Pulverized coal
Brown coal
Coking bituminous coal
Non-coking bituminous coal
Q.30
The increase in entropy of a system represents
Increase in availability of energy
Increase in temperature
Decrease in pressure
Degradation of energy
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