2101. Fatigue failure of a material results from __________ stress.
Tensile
Compressive
Fluctuating
None of these
✅ The correct answer is option C.
Chemical Engineering
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2102. The metals occuring at the lower most position in the electromotive series
Do not resist corrosion
Resist corrosion very strongly
Are very brittle
Are heat insulators
✅ The correct answer is option B.
2103. Chrome vanadium steels usually contain 0.8 to 1.1% Cr, 0.25 to 0.35% C and < 0.25% V. It is
Used for making axle & shafts of aeroplanes, automobiles and locomotives
Having poor fatigue resistance
Having poor toughness
Not helpful in producing cleaner steel due to oxidising action of vanadium
✅ The correct answer is option A.
2104. __________ is never shipped in glass carboys.
Ammonia
Acetic acid
Phenol
Formaldehyde
✅ The correct answer is option A.
2105. __________ possesses viscoelastic properties.
Cork
Glass
Graphite
Rubber
✅ The correct answer is option D.
2106. High speed steel tools retain their hardness upto a temperature of __________ °C.
500
750
900
1100
✅ The correct answer is option C.
2107. Which of the following is the softest material?
Quartz
Calcite
Corrundum
Flourite
✅ The correct answer is option B.
2108. Concentrated HCl at 30°C can be stored in a vessel made of
PTFE and porcelain
Cast iron and aluminium
Stainless steel and high silicon cast iron
None of these
✅ The correct answer is option A.
2109. Work hardening of a material
Decreases its tensile strength
Decreases its ductility
Increases its ductility
Does not affect its ductility
✅ The correct answer is option B.
2110. The material of construction of pressure mills used for squeezing out the juice from sugar cane is
Stainless steel
Cast iron
Mild steel
Monel
✅ The correct answer is option B.