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Online Tests
ECAT Physics Chapter 11 Heat & Thermodynamics Online Test MCQs With Answers
Question # 1
A process in which no heat enters or leaves the system is called
Choose an answer
isochoric process
isothermal process
adiabatic process
none of them
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Question # 2
If a liquid is heated in weightlessness, the heat is transmitted through
Choose an answer
Conduction
Convection
Radiation
Neither, because the liquid cannot be heated in weightlessness
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Question # 3
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 # 4
The volume of universal gas constant R is:
Choose an answer
8.314 J/K mole K
8314 J/K mole K
8.314 J/mole K
None of these
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Question # 5
The curve representing an adiabatic process is called
Choose an answer
isotherm
adiabat
adiable
none of them
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Question # 6
On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
Choose an answer
outwards
inwards
in either way
none of these
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Question # 7
For making cooking utensils, which of the following pairs of properties is most suited?
Choose an answer
Low specific heat and high conductivity
Low specific heat and low conductivity
High specific heat and high conductivity
High specific heat and low conductivity
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Question # 8
Triple point of water is
Choose an answer
273.16
°F
372.16K
273.16
°F
273.16
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Question # 9
The percentage of available heat energy converted into work by a diesel engine is roughly
Choose an answer
35 %`
40 %
35 - 40 %
25 %
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Question # 10
A real gas can be approximated to an ideal gas at
Choose an answer
Low density
High pressure
High density
Low temperature
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Question # 11
A reversible cycle is the one in which
Choose an answer
some of the changes are reversible
all of the changes are reversible
all of the changes are irreversible
none of them
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Question # 12
Adiabatic change occurs when the gas
Choose an answer
expands
compressed
expands or compressed
expands or compressed rapidly
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Question # 13
If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is
Choose an answer
P=P/V<1/2mv
2
>
P=2N/V<1/2mv
2
>
P=2/3N/V<1/2mv
2
>
P=2/3N/V<mv
2
>
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Question # 14
Average KE of a gas molecule has:
Choose an answer
Direct relation with absolute temperature and inverse relation with pressure
Direction relation with both absolute temperature and pressure
Inverse relation with both absolute temperature and pressure
None of these
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Question # 15
At what temperature the adiabatic change is equivalent to the isothermal change?
Choose an answer
Zero degree Celsius
Zero Kelvin
Critical temperature
Above critical temperature
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Question # 16
Hotness and coldness of an object is represented in terms:
Choose an answer
Heat
Temperature
Chemical energy
None of these
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