Explore topic-wise MCQs in Engineering.

Which of the following is not a naturally occurring nuclear fuel ?

An electron has a mass that is approximately __________ that of the proton.

Zircon refractories have

Carbon refractory blocks

Cold crushing strength of ordinary fireclay brick is about 950 kg/cm² . On exposure to a temperature of about 1500 C, its crushing strength may come down to as low as __________ kg/cm² .

Zirconia refractory

Which of the following consumes the maximum tonnage of refractories annually in an integrated steel plant ?

Which of the following is not a neutral refractory ?

Which one contains maximum percentage of Al₂O₃ ?

Which of the following does not occur during firing/burning of refractories ?

Silicon carbide refractories are used in the

__________ nozzles are used in continuous casting of steel,

silicon carbide refractories have very low

Basic bricks are not made of

With increase in the alumina content in firebricks, its fusion point (refractoriness)

Which is a basic refractory ?

Refractoriness under load (RUL) is the most important property for the refractory bricks

Alumina-graphite bricks are used for lining the

Machine moulding of dry mixture of refractories requires a pressure of the order of __________ kg/cm².

Fireclay bricks are never used in the

With increasing alumina content, the fusion point of high alumina refractories

Chrome magnesite bricks are used in the

Fertiliser plant making ammonium sulphate employing gypsum-ammonia reaction (usual practice is to use ammonia and sulphuric acid) is located at

Catalyst used in Haber's process for ammonia production is

Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium

Prilling tower is found in the flowsheet for the manufacture of

P₂O₅ content in triple superphosphate is about __________ percent.

H₃PO₄ is the chemical formula of __________ phosphoric acid.

The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent.

Urea is formed only

Reaction of orthophosphoric acid with soda ash produces

Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction.

Electric process as compared to wet process (for the manufacture of phosphoric acid)

Ammonium sulphate fertiliser is

In calcium ammonium nitrate (CAN) fertil-ser

Heating of orthophosphoric acid to 250 C produces

Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is termed as the __________ process.

Superphosphate is manufactured by reacting phosphate rock with

CO₂ present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in

Which of the following does not come under the category of 'secondary nutrient' for plant growth?

Steam reforming of naphtha is a source of hydrogen production for nitrogeneous fertiliser industry. What is the usual ratio of steam to carbon maintained in the process of steam reforming of naphtha ?

The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.

The amount of combustible escaping uncon-sumed from the furnace, depends upon the

(CH₃ C₆ H₄)₃ PO₄ is the chemical formula of

In a muffle furnace, the muffle

__________ is an indirectly heated furnace.

Which is not a hearth furnace ?

An example of shaft furnace is the

Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ C.

Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of