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question_answer1)
The first law of thermodynamics is the law of
A)
conservation of mass done
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B)
conservation of energy done
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C)
conservation of momentum done
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D)
conservation of heat done
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question_answer2)
First law of thermodynamics
A)
enables to determine change in internal energy to the system done
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B)
does not help to predict whether the system will or not undergo a change done
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C)
does not enable to determine change in entropy done
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D)
All of the above done
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question_answer3)
Stirling and Ericsson cycles are
A)
reversible cycles done
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B)
irreversible cycles done
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C)
quasi-static cycles done
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D)
semi-reversible cycles done
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question_answer4)
Carnot cycle is
A)
a reversible cycle done
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B)
an irreversible cycle done
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C)
a semi-reversible cycle done
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D)
a quasi static cycle done
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question_answer5)
Change in the internal energy of small temperature change\[\Delta T\]for ideal gas is expressed by the relation
A)
\[\Delta U={{C}_{v}}\times \Delta T\] done
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B)
\[\Delta \,U={{C}_{P}}\times \Delta T\] done
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C)
\[\Delta \,U=\frac{{{C}_{p}}}{{{C}_{v}}}\Delta T\] done
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D)
\[\Delta U=({{C}_{p}}-{{C}_{v}})\,\Delta T\] done
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question_answer6)
If a heat engine attains 100% thermal efficiency, it violates
A)
zero the law of thermodynamics done
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B)
first law of thermodynamics done
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C)
second law of thermodynamics done
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D)
law of conservation of energy done
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question_answer7)
A petrol engine theoretically operates on
A)
constant pressure cycle done
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B)
constant volume cycle done
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C)
constant temperature done
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D)
constant entropy cycle done
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question_answer8)
Which of the following is not an extensive property
A)
entropy done
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B)
enthalpy done
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C)
internal energy done
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D)
density done
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question_answer9)
For reversible adiabatic process, change in entropy is
A)
maximum done
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B)
minimum done
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C)
zero done
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D)
unpredictable done
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question_answer10)
Heat added in a reversible adiabatic process is equal to
A)
\[{{p}_{1}}{{V}_{1}}\,\,\log \,\,\frac{{{V}_{1}}}{{{V}_{2}}}\] done
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B)
\[{{C}_{V}}\,\,\left( \frac{\gamma -n}{1-n} \right)\,\,({{T}_{2}}-{{T}_{1}})\] done
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C)
Zero done
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D)
\[{{C}_{V}}\,\,\left( {{T}_{2}}-{{T}_{1}} \right)\] done
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question_answer11)
Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant
A)
pressure done
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B)
temperature done
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C)
volume done
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D)
internal energy done
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question_answer12)
What are the limitations to the signs of heat exchange from hot and cold reservoirs if a two-temperature machine operates between two negative temperatures?
A)
Heat must be rejected to hot source and abstracted from cold source done
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B)
Heat must be abstracted from hot source and rejected to cold source done
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C)
Heat must be rejected to both the sources done
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D)
No limitation done
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question_answer13)
Ericsson cycle consists of the following four processes
A)
two isothermals and two isentropics done
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B)
two isothermals and two constant volumes done
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C)
two isothermals and two constant pressures done
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D)
two adiabatics and two constant pressures done
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question_answer14)
Otto cycle consists of following four processes
A)
two isothermals and two isentropics done
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B)
two isentropics and two constant volumes done
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C)
two insentropics and one constant volume and one constant pressure done
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D)
Two isentropics and two constant pressures done
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question_answer15)
The cyclic integral of\[(\delta Q-\delta W)\]for a process is equal to
A)
positive done
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B)
negative done
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C)
zero done
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D)
positive or negative depending upon the type of process done
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question_answer16)
Atkinson gas engine has a special feature that
A)
isentropic compression and expansion are of equal stroke lengths done
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B)
isentropic compression is on a short stroke and the expansion on a longer stroke done
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C)
isentropic compression is on a longer stroke and the expansion on a short stroke done
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D)
it employes shortest compression and expansion Strokes done
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question_answer17)
An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is
A)
feasible done
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B)
impossible done
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C)
possible done
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D)
possible, but with lot of sophistications done
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question_answer18)
The basis for measuring thermodynamic property of temperature is given by
A)
zeroth law of thermodynamics done
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B)
first law of thermodynamics done
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C)
second law of thermodynamics done
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D)
third law of thermodynamics done
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question_answer19)
The ideal efficiency of a Stirling cycle with perfect regeneration and operating between two given temperature limits is
A)
equal to Carnot cycle done
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B)
less than Carnot cycle done
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C)
equal to Brayton cycle done
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D)
equal to Joule cycle done
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question_answer20)
Thermal power plant works on
A)
Carnot cycle done
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B)
Joule cycle done
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C)
Rankine cycle done
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D)
Otto cycle done
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question_answer21)
When a process undergoes a complete cycle then the change of entropy will be
A)
\[+ve\]value done
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B)
\[-ve\]value done
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C)
zero value done
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D)
\[+ve\]or \[-ve\]depending on initial condition done
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question_answer22)
What are the limitations to the signs of heat exchange from hot cold reservoirs if a two-temperature machine operates between two Positive temperatures
A)
heat must be rejected to hot source and abstracted from cold source done
clear
B)
heat must be abstracted from hot source and rejected to cold source done
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C)
heat must be rejected to both the sources done
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D)
heat must be abstracted from both the sources done
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question_answer23)
The ideal efficiency of Joule cycle operating between two given temperature limits is
A)
equal to Joule cycle done
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B)
equal to Camot cycle done
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C)
equal to Brayton cycle done
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D)
less than Camot cycle done
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question_answer24)
A Bell-Coleman cycle is a reversed
A)
Carnot cycle done
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B)
Otto cycle done
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C)
Joule cycle done
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D)
Stirling cycle done
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question_answer25)
Diesel cycle consists of following four processes
A)
two isothermals and two isentropics done
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B)
two isentropics, one constant volumes - done
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C)
two isentropics, one constant volume and one constant pressure done
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D)
two isentropics and two constant pressures done
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question_answer26)
Which of the following is not a property of thermodynamic system?
A)
Pressure done
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B)
Energy done
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C)
Heat done
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D)
Volumes saws done
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question_answer27)
Stirling and Ericsson cycles are:
A)
irreversible cycles done
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B)
quasi - static cycles done
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C)
semi - reversible cycles done
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D)
reversible cycles done
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question_answer28)
In thermodynamic cycle, heat is rejected at:
A)
constant volume done
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B)
constant pressure done
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C)
constant enthalpy done
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D)
constant temperature done
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question_answer29)
Which of the following cycle consists of three processes?
A)
Ericsson cycle done
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B)
Stirling cycle done
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C)
Alkinson cycle done
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D)
None of these done
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question_answer30)
Zeroth law of thermodynamics deals with:
A)
concept of temperature done
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B)
enthalpy done
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C)
entropy done
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D)
external and internal energy both done
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question_answer31)
Which of the following gives the correct relation between centigrade and fahrenheit scales?
A)
\[C=\frac{5}{9}\,\,(F-32)\] done
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B)
\[C=\frac{5}{9}\,\,(F+32)\] done
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C)
\[F=\frac{5}{9}\,\,(F+32)\] done
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D)
\[C=\frac{9}{5}\,\,(F-32)\] (c = degree centigrade, F = degree Fahrenheit) done
clear
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question_answer32)
Properties of substances like pressure, temperature and density in thermodynamic co-ordinates are:
A)
Path function done
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B)
Point function done
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C)
Cyclic function. done
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D)
Real function done
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question_answer33)
Heat is being supplied to air in a cylinder filled with frictionless piston held by a constant weight. The process will be:
A)
Isochoric done
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B)
Isothermal done
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C)
Isobaric done
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D)
Adiabatic done
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question_answer34)
Heat and work are:
A)
Point function done
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B)
System properties done
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C)
Path function done
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D)
None of these done
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question_answer35)
Which of the following in an irreversible process?
A)
Isothermal process done
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B)
Isentrobic process done
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C)
Isoparic process done
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D)
Isenthalpic process done
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question_answer36)
First Law of thermodynamics depicts the relation between
A)
heat and work done
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B)
heat, work and system properties done
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C)
various properties of the system done
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D)
various thermodynamics processes done
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question_answer37)
If Q = Heat content of a gas, u = Internal energy P = Pressure, V = Volume, T = Temperature then which of the following statement is applicable to perfect gas and is also true for an irreversible process?
A)
\[dQ=dU+qdV\] done
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B)
\[Tds=dU+PdV\] done
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C)
\[dQ=Tds\] done
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D)
\[dQ=Tds+dU\] done
clear
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