A. PCl₅
B. Quick lime
C. CaCl₂
D. Concentrated H₂SO₄
✅ The correct answer is option B.
Basic Chemical Engineering MCQs
In BOF, desiliconisation is a first order reaction. So the silicon content of the metal decreases
A. Linearly with time
B. Exponentially with time
C. Logarithmically with time
D. In proportion to the square root of time
✅ The correct answer is option A.
Out of the following, the dimensionless quantity is
A. Specific weight
B. Viscosity
C. Mach number
D. Density
✅ The correct answer is option C.
The process of removal of scale formed during hot rolling of steel is termed as
A. Descaling
B. Shot blasting
C. Pickling
D. Skimming
✅ The correct answer is option C.
__________ test can be termed as the semi-distructive test.
A. Impact
B. Torsion
C. Hardness
D. Charpy
✅ The correct answer is option C.
Earing is a defect found in steels after the following metal working operation (s).
A. Deep drawing
B. Rolling
C. Extrusion
D. Wire drawing
✅ The correct answer is option A.
Out of the following the refractive index is the highest for
A. Glass
B. Diamond
C. Brine
D. Kerosene
✅ The correct answer is option B.
Which of the following hardness tests does not measure the indentation hardness of metals and alloys ?
A. Vicker’s hardness test
B. Shore sceleroscope test
C. Brinell hardness test
D. Rockwell hardness test
✅ The correct answer is option B.
Kinematic viscosity of water as compared to that of air is
A. More
B. Same
C. 15% more
D. 15% less
✅ The correct answer is option D.
Number of electrons in the outermost shell of a semi-conductor material is
A. 2
B. 4
C. 6
D. 8
✅ The correct answer is option D.