Which adsorbant is used for removing sulphur compounds (S Q, H₂S, RSH etc.) removal from coke oven gas in by-products recovery plant ?

When the coal is heated in absence of air, it is called its

The maximum percentage of CO₂ in a flue gas (from a carbonaceous fuel) can be

A good quality coal should have

Pure carbon is completely burnt in oxygen. The flue gas analysis is 70%CO₂, 20%CO and 10%O₂. The percent excess oxygen used is

Oxygen percentage (by weight) in atmospheric air is

With increase in C/H ratio of a fuel, the amount of CO₂ formed on its complete combustion

Low temperature oxidation of coal is accelerated by the

__________ present in coal is not determined in its ultimate analysis.

Orsat apparatus

The calorific value of 'LPG' (propane +butane) is about __________ kcal/Nm³.

A particular coal is said to be free burning when it

A good quality coal should have

Hardgrove grindability index of four coal samples are given below. Which of them is the easiest to grind ?

Tolerable concentration of toxic carbon monoxide in atmospheric air is about __________ PPm.

Rate of low temperature oxidation of coal due to bad storage conditions

The ratio of maximum adiabatic flame temperature in air to that in pure oxygen is always

During the carbonisation of coal

Temperature of coke oven gas just before entering into saturator (for recovery of NH₃) is about __________ °C.

For everyincrease in the excess air; the fuel consumption increases by __________ percent.

C.V. (kcal/Nm³) of gaseous fuels __________ with increase in molecular weight.

Shatter index of the coke is a measure of its

High amount of sulphur and phosphorous in coke causes

__________ of the coal is the basis for Seylor's coal classification.

Which of the following is the maximum coal producing state in India ?

The calorific value of L.D. converter gas is about __________ Kcal/Nm³ .

In flue gas analysis by Orsat's apparatus, carbon dioxide is absorbed by

Washing of coal decreases its

Gobar gas is produced by the __________ of 'gobar' (cow dung).

Which is the heaviest fuel gas out of the following ?

Pick the odd man out.

Fusion point of coal ash increases with increase in its __________ content.

Pick out the wrong statement.

Narrow coke ovens as compared to wider coke ovens

The difference between total carbon and fixed carbon of coal will be minimum in case of

Main constituents of benzol are

Height of coke oven is limited (say maximum upto 7 metres) mainly by the

Out of the following fuels, the difference between the net and gross calorific value is maximum in case of

__________ prohibits the use of alcohols directly in petrol engines.

Caking index of the coal blend used for the manufacture of metallurgical coke should be around

Which of the following petrographic constituents of coal is non-coking ?

Dry air required to burn 1 kg of carbon completely may be around __________ kg.

The hottest part of the flame lies in its____zone.

Higher fuel combustion efficiency can not be achieved by

With increase in moisture content of coal, its

__________ has the widest inflammability limit (explosion limit) of all the gases.

Percentage of methane in coke oven gas may be around

Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is

Proximate analysis of coal determines its __________ content.