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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

Connecting rod is usually made of_________________?
A aluminium
B low carbon steel
C medium carbon steel
D high carbon steel
Correct Answer: medium carbon steel
Tungsten in high speed steel provides________________?
A hot hardness
B toughness
C wear resistance
D sharp cutting edge
Correct Answer: hot hardness
Sulphur in steel________________?
A acts as deoxidiser
B reduces the grain size
C decreases tensile strength and hardness
D lowers the toughness and transverse ductility
Correct Answer: lowers the toughness and transverse ductility
Pick up the wrong statement?
A aluminium in steel results in excessive grain growth
B manganese in steel induces hardness
C nickel and chromium in steel help in raising the elastic limit and improve the resilience and ductility
D tungsten in steels improves magnetic properties and hardenability
Correct Answer: aluminium in steel results in excessive grain growth
Bell metal contains_____________________?
A 70% copper and 30% zinc
B 90% copper and 10% tin
C 85-92% copper and rest tin with little lead and nickel
D 70-75% copper and rest tin
Correct Answer: 70-75% copper and rest tin
The correct sequence for descending order of machinability is _____________________?
A grey cast iron, low carbon steel, wrought iron
B low carbon steel, grey cast iron, wrought iron
C wrought iron,low carbon steel, grey cast iron
D wrought iron, grey cast iron, low carbon steel
Correct Answer: grey cast iron, low carbon steel, wrought iron
Aluminium bronze contains aluminium and copper in the ratio of___________________?
A 50 : 50
B 40 : 60
C 60 : 40
D 10 : 90
Correct Answer: 10 : 90
Muntz metal contains copper and zinc in the ratio of________________?
A 50 : 50
B 40 : 60
C 60 : 40
D 20 : 80
Correct Answer: 60 : 40
Polar moment of inertia (IP) of ac disc is to ht determined by suspen by a wire and noting the frequei oscillations (f) ?
A Ipocf
B Ipocf
C Ip oc j
D Ipoc-
Correct Answer: Ip oc j
The Bifilar suspension method is used to determine__________________?
A natural frequency of vibration
B position of balancing weights
C moment of inertia
D centripetal acceleration’
Correct Answer: moment of inertia
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