A. 180°
B. 212°
C. 32°
D. 273°
✅ The correct answer is option A.
Engineering
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642. The most abundant metal present in the earth’s crust is;
A. Iron
B. Copper
C. Titanium
D. Aluminium
✅ The correct answer is option D.
643. Which of the following is capable of acting both as an acid flux as well as a basic flux in the metal extraction from its ore?
A. Silica
B. Lime
C. Alumina
D. Fluorite
✅ The correct answer is option C.
644. Aromatics are desired constituents of
A. Lubricating oil
B. Diesel
C. Kerosene
D. Petrol
✅ The correct answer is option C.
645. Fibrous fracture is normally encountered in the __________ materials.
A. Hard
B. Elastic
C. Ductile
D. Brittle
✅ The correct answer is option C.
646. Wohler test is a destructive test to find out the __________ strength of a prepared metal specimen.
A. Creep
B. Fatigue
C. Endurance
D. Tensile
✅ The correct answer is option B.
647. Ammonia gas can be dried by
A. PClâ‚…
B. Quick lime
C. CaClâ‚‚
D. Concentrated Hâ‚‚SOâ‚„
✅ The correct answer is option B.
648. 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.
649. Out of the following, the dimensionless quantity is
A. Specific weight
B. Viscosity
C. Mach number
D. Density
✅ The correct answer is option C.
650. 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.