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Engineering Thermodynamics

Engineering Thermodynamics
One kg of ethylene (C2H4) requires 2 kg of oxygen and produces 22/7 kg of carbon dioxide and ___ kg of water or steam.

11/4
9/7
11/7
7/4

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Engineering Thermodynamics
The compression ratio for petrol engines is

15 to 30
10 to 20
3 to 6
5 to 8

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Engineering Thermodynamics
Diesel cycle consists of following four processes

Two isentropic and two constant pressures
Two isentropic and two constant volumes
Two isothermal and two isentropic
Two isentropic, one constant volume and one constant pressure

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Engineering Thermodynamics
The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as

Entropy
Enthalpy
External energy
Internal energy

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Engineering Thermodynamics
The standard value of atmospheric pressure taken at sea level is

1013 × 102 N/m2
1.013 bar
All of these
760 mm of Hg

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Engineering Thermodynamics
A mixture of gas expands from 0.03 m3 to 0.06 m3 at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is

84 kJ
54 kJ
114 kJ
30 kJ

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