Fuels And Combustion — Part 2 MCQs with Explanations

Nickel is the correct answer to “Catalyst used in Fischer-Tropsch process is”. This question is standard in competitive examination syllabi for Fuels And Combustion.

All of the above is the correct answer to “The cuprous chloride used in orsat apparatus can absorb”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Both O2 and CO2 is the correct answer to “The pyragallol solution used in orsat apparatus can absorb”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Flame temperature is the correct answer to “Use of preheated air for combustion of fuel in the furnace, increases the”. This question is standard in competitive examination syllabi for Fuels And Combustion.

May increase or decrease, depends on combustibles is the correct answer to “C.V. (kcal/Nm 3 ) of gaseous fuels __________ with increase in molecular weight.”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Gaseous fuels is the correct answer to “'Wobbe index' is a characteristic of”. This question is standard in competitive examination syllabi for Fuels And Combustion.

All of the above is the correct answer to “Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its”. This question is standard in competitive examination syllabi for Fuels And Combustion.

10,000 is the correct answer to “The calorific value of natural gas is about __________ kcal/Nm 3 .”. This question is standard in competitive examination syllabi for Fuels And Combustion.

3300 is the correct answer to “Calorific value of wood gas is about __________ kcal/Nm 3 .”. This question is standard in competitive examination syllabi for Fuels And Combustion.

6500 is the correct answer to “Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ kcal/Nm 3 .”. This question is standard in competitive examination syllabi for Fuels And Combustion.

25,000 is the correct answer to “The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm 3 .”. This question is standard in competitive examination syllabi for Fuels And Combustion.

1300 is the correct answer to “The calorific value of producer gas is around __________ kcal/Nm 3 .”. This question is standard in competitive examination syllabi for Fuels And Combustion.

65 is the correct answer to “Yield of pitch from distillation of high temperature tar is around __________ percent.”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Its thorough mixing with air is the correct answer to “Supply of excess air for complete combustion of fuel is necessitated to facilitate”. This question is standard in competitive examination syllabi for Fuels And Combustion.

H2 content in the coke oven gas is more is the correct answer to “In high temperature carbonisation of coal compared to low temperature carbonisation”. This question is standard in competitive examination syllabi for Fuels And Combustion.

25-30 is the correct answer to “Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.”. This question is standard in competitive examination syllabi for Fuels And Combustion.

2.4 is the correct answer to “Dry air requirement for burning 1 Nm 3 of CO to CO 2 may be around __________ Nm 3 .”. This question is standard in competitive examination syllabi for Fuels And Combustion.

All of the above is the correct answer to “Low temperature oxidation and spontaneous combustion of freshly mined coal is accentuated, if”. This question is standard in competitive examination syllabi for Fuels And Combustion.

None of these is the correct answer to “With increase in moisture content of coal, its”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Swelling characteristics is the correct answer to “Gray King Assay and Swelling Index of a coal is a measure of its”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Agglutinating (binding) properties is the correct answer to “Caking index of a coal is a measure of its”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Hardness & strength is the correct answer to “Micum Index of a coke is a measure of its”. This question is standard in competitive examination syllabi for Fuels And Combustion.

All of the above is the correct answer to “Weathering of coal during storage causes”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Storage in large heaps is the correct answer to “Low temperature oxidation of coal is accelerated by the”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Both B and C is the correct answer to “Washing of coal is done to reduce the”. This question is standard in competitive examination syllabi for Fuels And Combustion.

All of the above is the correct answer to “Low temperature oxidation of stored coal results in the”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Both A & B is the correct answer to “Adiabatic flame temperature of a fuel is dependent on the initial temperature of”. This question is standard in competitive examination syllabi for Fuels And Combustion.

0 is the correct answer to “Pure carbon is completely burnt in oxygen. The flue gas analysis is 70% CO 2 , 20% CO and 10% O 2 . The percent excess oxygen used is”. This question is standard in competitive examination syllabi for Fuels And Combustion.

None of these is the correct answer to “Which of the following is not a product of tar distillation”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Minimise the chances of clinker formation is the correct answer to “Steam is intermittently admitted into the fuel bed during the production of producer gas to”. This question is standard in competitive examination syllabi for Fuels And Combustion.

May damage its walls due to abrupt excessive swelling of coal is the correct answer to “High rate of heating of coke ovens”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Not at all is the correct answer to “By-products are __________ recovered in 'Beehive ovens'.”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Ultimate analysis is the correct answer to “__________ of the coal is the basis for Seylor's coal classification.”. This question is standard in competitive examination syllabi for Fuels And Combustion.

None of these is the correct answer to “Low temperature oxidation of coal during storage does not decrease its”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Both A & B is the correct answer to “Actual flame temperature is always lower than the adiabatic flame temperature, because there is”. This question is standard in competitive examination syllabi for Fuels And Combustion.

< 1 is the correct answer to “The ratio of maximum adiabatic flame temperature in air to that in pure oxygen is always”. This question is standard in competitive examination syllabi for Fuels And Combustion.

All of the above is the correct answer to “Sometimes water is sprayed during coal charging in the coke oven, which helps in”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Enhanced sensible heat loss in the flue gas is the correct answer to “The main drawback of supplying more excess air in the combustion of fuel is the”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Liquefied petroleum gas (LPG) is the correct answer to “Which of the following fuel gases has the highest calorific value”. This question is standard in competitive examination syllabi for Fuels And Combustion.

Anthracite is the correct answer to “Which of the following has the highest calorific value”. This question is standard in competitive examination syllabi for Fuels And Combustion.