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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

Cupola produces following material__________________?
A cast iron
B pig iron
C wrought iron
D malleable iron
Correct Answer: cast iron
The following element can’t impart high strength at elevated temperature__________________?
A manganese
B magnesium
C nickel
D silicon
Correct Answer: magnesium
White cast iron__________________?
A contains 1.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron
B is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
C is produced by annealing process. It is soft, tough and easily machined metal
D is produced by small additions of magnesium (or creium) in the ladle. Graphite is in nodular or spheroidal form and is well dispersed throughout the material
Correct Answer: is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
Pipes for bicycle frames are made of___________________?
A cold rolled steel
B hot rolled steel
C forged steel
D cast steel
Correct Answer: cold rolled steel
Heavy duty leaf and coil spring* contain carbon of the following order ________________?
A 0.2%
B 0.5%
C 0.8%
D 1.0%
Correct Answer: 1.0%
Drop forging dies contain carbon of the order of_________________?
A 0.1 to 0.2%
B 0.25 to 0.5%
C 0.6 to 0.7%
D 0.7 to 0.9%
Correct Answer: 0.6 to 0.7%
The tensile strength of wrought iron is maximum _________________?
A along the lines of slag distribution
B perpendicular to lines of slag distribution
C uniform in all directions
D unpredictable
Correct Answer: along the lines of slag distribution
Preheating is essential in welding ___________________?
A cast iron
B high speed steel
C all non-ferrous materials
D all of the above
Correct Answer: cast iron
Balls for ball bearings are made of_________________?
A cast iron
B mild steel
C stainless steel
D carbon-chrome steel
Correct Answer: carbon-chrome steel
Taps, dies and drills contain carbon________________?
A below 0.5%
B below 1%
C above 1%
D above 2.2%
Correct Answer: above 1%

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