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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

Admiralty gun metal contains__________________?
A 63 to 67% nickel and 30% copper
B 88% copper, 10% tin and rest zinc
C alloy of tin, lead and cadmium
D iron scrap and zinc
Correct Answer: 88% copper, 10% tin and rest zinc
Free cutting steels_____________________?
A are used where ease in machining is the criterion
B contain carbon in free form
C require least cutting force
D do not exist
Correct Answer: are used where ease in machining is the criterion
The alloy used for making electrical resistances and heating elements is____________________?
A nichrome
B invar
C magnin
D elinvar
Correct Answer: nichrome
Gun 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 70-78% copper and rest tin
Correct Answer: 85-92% copper and rest tin with little lead and nickel
Bronze 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: 90% copper and 10% tin
Structural steel contains following principal alloying elements__________________?
A nickel, chromium and manganese
B tungsten, molybdenum and phosphorous
C lead, tin, aluminium
D zinc, sulphur, and chromium
Correct Answer: nickel, chromium and manganese
Which of the following is used for bearing liner_______________?
A gun metal
B bronze
C bell metal
D babbit metal
Correct Answer: babbit metal
If a refractory contains high content of silicon, it means refractory is__________________?
A acidic
B basic
C neutral
D brittle
Correct Answer: neutral
Corrundum contains more than 95% _____________________?
A steel
B A1203
C Si02
D MgO
Correct Answer: A1203
Ductile 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 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

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