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Engineering Thermodynamics

Engineering Thermodynamics
The atomic mass of oxygen is

121
18
14
16

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Engineering Thermodynamics
A gas is compressed in a cylinder by a movable piston to a volume one half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be

300 Nm
3000 Nm
300,000 Nm
30 Nm

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Engineering Thermodynamics
The efficiency of a Carnot engine depends on

Temperatures of source and sink
Design of engine
Size of engine
Working substance

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Engineering Thermodynamics
On weight basis, air contains following parts of oxygen

25
73
21
23

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Engineering Thermodynamics
The area under the temperature-entropy curve (T – s curve) of any thermodynamic process represents

Either heat absorbed or heat rejected
Heat absorbed
Heat rejected
None of the listed here

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Engineering Thermodynamics
If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called

Hyperbolic expansion
Parabolic expansion
Free expansion
Adiabatic expansion

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MORE MCQ ON Engineering Thermodynamics

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