20351. 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
20352. Presence of phosphorous in metallurgical coal
20353. 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.
20354. 'Fat' coal means a coal having
20355. Atomising steam to fuel oil ratio in a burner should be around
20356. 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
20357. Oxygen percentage (by weight) in atmospheric air is
20358. __________ of the coal is the basis for Seylor's coal classification.
20359. Main constituents of benzol are
20360. "Overfire burning" in a furnace is a phenomenon characterised by the
20361. Yield of pitch from distillation of high temperature tar is around __________ percent.
20362. Fuel consumption in coke making can be reduced by
20363. During combustion of coal on grate, clinker formation is increased by the
20364. If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be
20365. The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm3.
20366. Washing of coal decreases its
20367. Which of the following petrographic constituents of coal is non-coking ?
20368. __________ has the widest inflammability limit (explosion limit) of all the gases.
20369. Percentage of methane in coke oven gas may be around
20370. Orsat apparatus
20371. In flue gas analysis by Orsat's apparatus, carbon dioxide is absorbed by
20372. Caking index of the coal blend used for the manufacture of metallurgical coke should be around
20373. The standard size of a catalogue card is:
20374. The first Thesaurus published in the world is:
20375. Presence of free moisture in coal is most disadvantageous during
20376. The heat of combustion of a fuel
20377. High excess air in combustion of fuels results in
20378. Abrasion index of blast furnace coke should be around __________ percent.
20379. Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent.
20380. Cannel coal and boghead coal are the examples of
20381. Which of the following combustibles is absent in blast furnace gas ?
20382. The calorific value of producer gas is around __________ kcal/Nm3
20383. About __________ Nm3 of air will be required for the complete combustion of 2Nm3 of CO.
20384. Coking time in beehive coke oven is about
20385. Which of the following has the highest calorific value ?
20386. __________ present in coal is not determined in its ultimate analysis.
20387. The calorific value of L.D. converter gas is about __________ Kcal/Nm3 .
20388. __________ prohibits the use of alcohols directly in petrol engines.
20389. Higher fuel combustion efficiency can not be achieved by
20390. With increase in C/H ratio of a fuel, the amount of CO2 formed on its complete combustion
20391. Which of the following is the maximum coal producing state in India ?
20392. Height of coke oven is limited (say maximum upto 7 metres) mainly by the
20393. Out of the following fuels, the difference between the net and gross calorific value is maximum in case of
20394. The hottest part of the flame lies in its____zone.
20395. Bunsen burner is an example of a/an __________ burner.
20396. Higher efficiency in the combustion of solid fuel can not be achieved by
20397. A coal containing very high percentage of durain is called __________ coal.
20398. During combustion of gaseous fuels, deficiency of air
20399. Gross and net calorific value of a fuel will be the same