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Quiz 5
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Q.1
The general law of expansion or compression is pvn = C, The process is said to be hyperbolic, if n is equal to
0
1
γ
∝
Q.2
During which of the following process does heat rejection takes place in Carnot cycle?
Isothermal expansion
Isentropic expansion
Isothermal compression
Isentropic compression
Q.3
The unit of mass in S.I. units is
Kilogram
Gram
Tonne
Quintal
Q.4
The unit of pressure in S.I. units is
kg/cm²
mm of water column
Pascal
Dyne per square cm
Q.5
The unit of length in S.I. units is
Meter
Centimeter
Kilometer
Millimeter
Q.6
The unit of energy in S.I. units is
watt
Joule
joule/s
joule/m
Q.7
The unit of time in S.I. units is
Second
Minute
Hour
Day
Q.8
The unit of temperature in S.I. units is
Centigrade
Celsius
Fahrenheit
Kelvin
Q.9
The unit of power in S.I. units is
Newton
Pascal
Erg
Watt
Q.10
The value of the product of molecular weight and the gas characteristic constant for all the gases in S.I. units is
29.27 J/kmol °K
83.14 J/kmol °K
848 J/kmol °K
735 J/kmol °K
Q.11
A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as
Irreversible cycle
Thermodynamic cycle
Reversible cycle
None of these
Q.12
The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as
Element
Compound
Atom
Molecule
Q.13
The amount of heat generated per kg of fuel is known as
Calorific value
Heat energy
Lower calorific value
Higher calorific value
Q.14
The specific heat of water is
2.512
1.817
4.187
None of these
Q.15
Change in enthalpy of a system is the heat supplied at
Constant pressure
Constant temperature
Constant volume
Constant entropy
Q.16
Which of the following has the highest calorific value?
Anthracite coal
Bituminous coal
Peat
Lignite
Q.17
Which of the following gas has the highest calorific value?
Coal gas
Producer gas
Mond gas
Blast furnace gas
Q.18
Carbonization of coal consists of
Drying and crushing the coal to a fine powder
Moulding the finely ground coal under pressure with or without a binding material
Heating the wood with a limited supply of air to temperature not less than 280°C
None of the above
Q.19
The value of cp/cv for air is
1
1.4
1.45
2.3
Q.20
When cut-off ratio is ________; the efficiency of Diesel cycle approaches to Otto cycle efficiency
1/4
Zero
1/5
2
Q.21
For the same maximum pressure and temperature,
Otto cycle is more efficient than Diesel cycle
Diesel cycle is more efficient than Otto cycle
Dual cycle is more efficient than Otto and Diesel cycles
Dual cycle is less efficient than Otto and Diesel cycles
Q.22
The fuel mostly used in cement industry and in metallurgical processes is
Wood charcoal
Bituminous coke
Pulverized coal
Coke
Q.23
According to Dalton's law, the total pressure of the mixture of gases is equal to
Greater of the partial pressures of all
Average of the partial pressures of all
Sum of the partial pressures of all
Sum of the partial pressures of all divided by average molecular weight
Q.24
When a gas is heated, change takes place in
Temperature
Pressure
Volume
All of these
Q.25
Mixture of ice and water form a
Closed system
Open system
Isolated system
Heterogeneous system
Q.26
The entropy may be expressed as a function of
Pressure and temperature
Temperature and volume
Heat and work
All of these
Q.27
A molecule consisting of one atom is known as
Mono-atomic
Di-atomic
Tri-atomic
Poly-atomic
Q.28
One molecule of oxygen consists of __________ atoms of oxygen.
2
4
8
16
Q.29
Addition of heat at constant pressure to a gas results in
Raising its temperature
Raising its pressure
Raising its volume
Raising its temperature and doing external work
Q.30
Which of the following items is not a path function?
Heat
Work
Kinetic energy
Thermal conductivity
0 h : 0 m : 1 s
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