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Fuels and Combustion

Fuels and Combustion
Optimum preheating temperature for pitch creosote mixture (PCM) which is also termed as C.T.F-200, before atomisation through burners is

200 °F
200 °R
200 °C
200 °K

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Fuels and Combustion
By-products are __________ recovered in 'Beehive ovens'.

Not at all
Partially
Negligibly
Fully

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Fuels and Combustion
Which of the following is not a product of tar distillation?

Anthracene & creosote
Benzol & pitch
Phenol & naphthalene
None of these

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Fuels and Combustion
As the C/H ratio of the fuel increases, the amount of CO₂ formed on combustion __________ for the same percentage of excess air.

Increases
Decreases
May increase or decrease depending on the type of fuel
Remains same

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Fuels and Combustion
The temperature at which plastic layer formation takes place during carbonisation of coal varies from __________ °C.

350 to 450
550 to 650
700 to 850
100 to 150

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Fuels and Combustion
Pensky-Marten apparatus is used for those oils, whose flash points are __________ °F.

>120
90-110

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