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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 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
The usual composition of a soldering alloy is__________________?
A tin, lead and small percentage of antimony
B tin and lead
C tin, lead and silver
D tin and copper
Correct Answer: tin, lead and small percentage of antimony
The crystal structure of brass is_________________?
A F.C.C.
B B.C.C.
C H.C.P.
D Orthorhombic crystalline structure
Correct Answer: F.C.C.
A specimen of aluminium metal when observed under microscope shows __________________?
A B.C.C. crystalline structure
B F.C.C. crystal structure
C H.C.P. structure
D a complex cubic structure
Correct Answer: F.C.C. crystal structure
Brass 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% copper and 30% zinc
Steel made from phosphatic iron is_________________?
A brittle
B hard
C ductile
D tough
Correct Answer: brittle
Which one of the following metals would work-harden more quickly than the others__________________?
A copper
B brass
C lead
D silver
Correct Answer: brass
The composition of silver solder is ___________________?
A silver, copper, zinc
B silver, tin, nickel
C silver, lead, zinc
D silver, copper, aluminium
Correct Answer: silver, copper, zinc

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