Chemistry Test Preparations On Fuels Combustion Part 2

Test Preparation on Chemistry Test Preparations On Fuels Combustion Part 2

1.

The softening temperature of coal ash is a measure of the __________ of coal.

1caking tendency
2coking tendency
3clinkering tendency
4size stability

2.

A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be

1more
2less
3same
4data insufficient; can't be predicted.

3.

Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for the determination of the calorific value of coal/fuel oil may be around __________ atm.

13-5
220-30
360-65
495-100

4.

'Fat' coal means coal having

1low calorific value.
2high volatile matter,
3low ash content.
4non smoking tendency.

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