Low calorific value
High volatile matter
Low ash content
Non smoking tendency
✅ The correct answer is option B.
Chemical Engineering MCQs
The maximum adiabatic flame temperature in air is __________ the maximum flame temperature in pure oxygen.
Lower than
Higher than
Same as
Not related to
✅ The correct answer is option A.
Combustion of pulverised fuel
Requires larger combustion chamber than rich gaseous fuel
In a metallurgical furnace does not contaminate the product in the furnace by ash from fuel
Suppresses the discharge of fine dust and grit into atmosphere
All of the above
✅ The correct answer is option A.
Refractory materials are never used in the construction of
segar cones
orton cones
pressure vessels
ovens & retorts
✅ The correct answer is option C.
Chrome magnesite bricks are used in the
side walls of soaking pits and arc furnaces.
copper melting furnaces & converters.
burner block of glass tanks.
all (a), (b) and (c)
✅ The correct answer is option D.
With increase in the porosity, thermal spalling resistance of fireclay brick
increases
decreases
remains same
may increase or decrease
✅ The correct answer is option A.
__________ nozzles are used in continuous casting of steel,
Zircon
Thoria
Carborundum
Beryllia
✅ The correct answer is option A.
10 to 30% magnesite is added to chromite to produce chrome-magnesite refractories. Magnesite addition is mainly done to improve the __________ of chromite.
spalling resistance
refractoriness
crushing strength
resistance to slag
✅ The correct answer is option A.
High refractorinness of refractory bricks means, that it has a
high spalling resistance.
low spalling resistance.
high resistance to fusion.
low porosity.
✅ The correct answer is option C.
Which is an acidic refractory ?
Magnesite
Dolomite
Fireclay
Chrome magnesite
✅ The correct answer is option C.