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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

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
Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio_________________?
A 50 : 50
B 30 : 70
C 70 : 30
D 40 : 60
Correct Answer: 30 : 70
Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio _____________________?
A 50 : 20 : 20 : 10
B 40 : 30 : 20 : 10
C 50 : 20 : 10 : 20
D 30 : 20 : 30 : 20
Correct Answer: 50 : 20 : 20 : 10
Corrosion resistance of steel is increased by adding__________________?
A chromium and nickel
B nickel and molybdenum
C aluminium and zinc
D tungsten and sulfur
Correct Answer: chromium and nickel
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