Thermodynamics - Mechanical Engineering Questions and Answers

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Petrol is distilled at

65° to 220°C

220° to 345°C

345° to 470°C

470° to 550°C

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If the carbon content in the bituminous coal is 78 to 81%, it is said to be coking bituminous coal.

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The efficiency of the Carnot cycle is (where T₁ and T₂ = Highest and lowest temperature during the cycle)

$\frac { T_1 } { T_2 } - 1$

$1 - \frac { T_1 } { T_2 }$

$1 - \frac { T_2 } { T_1 }$

$1 + \frac { T_2 } { T_1 }$

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The mass of excess air supplied is equal to

$\frac { 23 } { 100 } \times$ Mass of excess carbon

$\frac { 23 } { 100 } \times$ Mass of excess oxygen

$\frac { 100 }{ 23 } \times$ Mass of excess carbon

$\frac { 100 }{ 23 } \times$ Mass of excess oxygen