The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm³. 10, 000 5000 25, 000 15, 000 TRUE ANSWER : ? YOUR ANSWER : ?
Presence of __________ in a dry gaseous fuel does not contribute to its calorific value. Carbon Hydrogen Sulphur Oxygen TRUE ANSWER : ? YOUR ANSWER : ?
Low temperature oxidation of coal during storage does not decrease its Calorific value Oxygen content None of these Caking power TRUE ANSWER : ? YOUR ANSWER : ?
For maximum discharge through a chimney, its height should be 200 meters Equal to the height of the hot gas column producing draught More than 105.7 metres Infinitely long TRUE ANSWER : ? YOUR ANSWER : ?
High ash containing coke None of these Has poor strength and abrasion resistance Is desirable in producer gas manufacture Produces more slag when used in the blast furnace TRUE ANSWER : ? YOUR ANSWER : ?
The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called Fire point Smoke point Kindling temperature Burning temperature TRUE ANSWER : ? YOUR ANSWER : ?
A sample of natural gas containing 80% methane (CH₄) and rest nitrogen (N₂) is burnt with 20% excess air. With 80% of the combustibles producing CO₂ and the reminder going to CO, the Orsat analysis in volume percent is CO₂ : 6.26, CO : 1.56, O₂ : 3.91, H₂O :15.66, N₂ : 72.60 CO₂ : 7.60, CO : 1.90, O₂ : 4.75, N₂ : 85.74 CO₂ : 6.39, CO : 1.60, O₂ : 3.99, H₂O:25.96, N₂:72.06 CO₂ : 7.42, CO : 1.86, O₂ : 4.64, N₂:86.02 TRUE ANSWER : ? YOUR ANSWER : ?
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 Data insufficient; can't be predicted Less Same More TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm³ gas ? Blast furnace gas Water gas Natural gas Producer gas TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following fuel gases is heavier than air? Natural gas Blast furnace gas Coke oven gas Water gas TRUE ANSWER : ? YOUR ANSWER : ?