450
250
150
65
✅ The correct answer is option D.
Chemical Engineering MCQs
silicon carbide refractories have very low
refractoriness (< 1700°C).
thermal conductivity.
resistance to thermal shock.
none of these.
✅ The correct answer is option D.
Outer combustion chamber of blast furnace stove is lined with __________ bricks.
fireclay
silica
chrome magnesite
zirconia
✅ The correct answer is option A.
Electrical resistor bars are made of
silicon carbide
alumina
zirconia
graphite
✅ The correct answer is option A.
Cold crushing strength of fireclay bricks is about __________ kgf/cm2.
50-100
100-150
200-400
500-1000
✅ The correct answer is option C.
Main constituents of purified Lurgi gas are
H₂, CmHn & CO₂
CO, H₂ & CH₄
CO₂, O₂ & CO
N₂, H₂ & CO₂
✅ The correct answer is option B.
Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.
CO content
Dew point
CO₂ content
O₂ content
✅ The correct answer is option A.
Which of the following gaseous fuels is likely to have the highest gross calorific value?
Sewage gas
LPG
Producer gas
Natural gas
✅ The correct answer is option B.
Higher percentage of ash in coal meant for the production of metallurgical grade coke
Decreases the hardness of coke
Decreases the abrasion resistance of coke
Causes brittleness in steel
None of these
✅ The correct answer is option D.
Presence of nitrogen in combustion air does not reduce the
Amount of heat liberated
Flame temperature
Flue gas temperature
Any of the above
✅ The correct answer is option A.