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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

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Mechanical Engineering MCQs prepared for job test and interview preparation, especially for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover key topics such as Machine Design, Theory of Machines, Hydraulic Machines, and other important mechanical engineering concepts.

All Topics  1919

Wrought iron is________________?
A hard
B high in strength
C highly resistant to corrosion
D heat treated to change its properties
Correct Answer: highly resistant to corrosion
A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as_________________?
A allotropic change
B recrystallisation
C heat treatment
D precipitation
Correct Answer: allotropic change
Cast iron has_________________?
A high tensile strength
B its elastic limit close to the ultimate breaking strength
C high ductility
D all of the above
Correct Answer: its elastic limit close to the ultimate breaking strength
An important property of malleable cast iron in comparison to grey cast iron is the high___________________?
A compressive strength
B ductility
C carbon content
D hardness
Correct Answer: ductility
Carbon steel is_______________?
A made by adding carbon in steel
B refined from cast iron
C an alloy of iron and carbon with varying quantities of phosphorus and sulphur
D extensively used for making cutting tools
Correct Answer: an alloy of iron and carbon with varying quantities of phosphorus and sulphur
‘Killed steels’ are those steels__________________?
A which are destroyed by burning
B which after their destruction are recycled to produce fresh steel
C which are deoxidised in the ladle with silicon and aluminium
D in which carbon is completely burnt
Correct Answer: which are deoxidised in the ladle with silicon and aluminium
The most effective inhibitor of grain growth, when added in small quantities is__________________?
A carbon
B vanadium
C manganese
D cobalt
Correct Answer: vanadium
Maximum percentage of carbon in ferrite is___________________?
A 0.025%
B 0.06%
C 0.1%
D 0.25%
Correct Answer: 0.025%
Corrosion resistance of steel is increased by addition of________________?
A chromium and nickel
B sulphur, phosphorus, lead
C vanadium, aluminium
D tungsten, molybdenum, vanadium, chromium
Correct Answer: chromium and nickel
Railway rails are normally made of_______________?
A mild steel
B alloy steel
C high carbon
D tungsten steel
Correct Answer: high carbon
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