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Engineering Thermodynamics

Engineering Thermodynamics
One kg of carbon produces ___ kg of carbon dioxide.

11/3
4/11
3/7
11/7

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Engineering Thermodynamics
The hard coke is obtained when carbonization of coal is carried out at

500° to 700°C
900° to 1100°C
700° to 900°C
300° to 500°C

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Engineering Thermodynamics
The efficiency of Joule cycle is

None of these
Less than Carnot cycle
Greater than Carnot cycle
Equal to Carnot cycle

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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

300,000 Nm
300 Nm
3000 Nm
30 Nm

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Engineering Thermodynamics
A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is

-80 kJ
+60 kJ
-140 kJ
-40 kJ

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Engineering Thermodynamics
The natural solid fuel is

Anthracite coal
Wood
Coke
Pulverised coal

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