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Online Tests
ECAT Physics Chapter 11 Heat & Thermodynamics Online Test MCQs With Answers
Question # 1
An irreversible heat flow from a hot to cold substances of a system, causes the disorder to
Choose an answer
decrease
remains the same
increase
any one of them
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Question # 2
At absolute temperature, the kinetic energy of the molecules
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Becomes zero
Becomes maximum
Becomes minimum
Remain constant
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Question # 3
When two objects come to common temperature, the body is said to be in:
Choose an answer
Static equilibrium
Dynamic equilibrium
Thermal equilibrium
None of these
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Question # 4
The disorder in the system increases due to the
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removal of heat
addition of heat
removal or addition of heat
none of them
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Question # 5
At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:
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Double
Remains constant
Half
None of these
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Question # 6
The length of a metallic rod is 5 meter at 100
°C. The coefficient of cubical expansion of the metal will be
Choose an answer
2.0 x 10
-5
/
°C
4.0x10
-5
/
°C
6.0x10
-5
/
°C
2.33x10
-5
/
°C
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Question # 7
Which of the following is not thermo dynamical function?
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Enthalpy
Work done
Gibb's energy
Internal energy
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Question # 8
The percentage of available heat energy converted into work by a diesel engine is roughly
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35 %`
40 %
35 - 40 %
25 %
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Question # 9
In the theory of dimensional analysis, heat may be properly represented by:
Choose an answer
ML
2
T
-2
MT
-2
ML
-1
T
-1
None of these
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Question # 10
A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be
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1/2
More than 1/2
Less than 1/2
Between 1 and 2
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Question # 11
If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I
3
gives the:
Choose an answer
Force
Density
Work done
Pressure
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Question # 12
A carnot cycle consists of
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One step
two step
three steps
four steps
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Question # 13
The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :
Choose an answer
1.7 x 10
3
J
10.2 x 10
3
J
3..4 x 10
3
J
6.8 x 10
3
J
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Question # 14
On a cold morning a metal surface will fell colder to touch than a wooden surface, because
Choose an answer
Metal has high specific heat
Metal has high thermal conductivity
Metal has low specific heat
Metal has low thermal conductivity
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Question # 15
Truth of kinetic energy is confirmed by:
Choose an answer
Diffusion of gases
Brownian motion
Both A and B
None of these
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Question # 16
The basis to define a temperature scale that is independent of material properties is provided by
Choose an answer
carbon cycle
nitrogen cycle
Carnot cycle
irreversible cycle
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