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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

Aluminium bronze contains__________________?
A 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
B 92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg
C 10% aluminium and 90% copper
D 90% magnesium and 9% aluminium with some copper
Correct Answer: 10% aluminium and 90% copper
Which of the following has highest specific strength of all structural materials__________________?
A magnesium alloys
B titanium alloys
C chromium alloys
D magnetic steel alloys
Correct Answer: titanium alloys
White metal contains__________________?
A 63 to 67% nickel and 30% copper
B 88% copper and 10% tin and rest zinc
C alloy of tin, lead and cadmium
D silver and chromium
Correct Answer: alloy of tin, lead and cadmium
Addition of silicon to aluminium results in____________________?
A improvement of casting characteristics
B improvement of corrosion resistance
C one of the best known age and precipitation-hardening systems
D improving machinability
Correct Answer: improvement of casting characteristics
Which of the following alloys does not have copper as one of the constituents________________?
A delta metal
B monel metal
C constantan
D nichrome
Correct Answer: nichrome
Addition of manganese to aluminium results in__________________?
A improvement of casting characteristics
B improvement of corrosion resistance
C one of the best known age and precipitation-hardening systems
D improving machinability
Correct Answer: improvement of corrosion resistance
Which is false statement about properties of aluminium ___________________?
A modulus of elasticity is fairly low
B wear resistance is very good
C fatigue strength is not high
D creep strength limits its use to fairly low temperatures
Correct Answer: wear resistance is very good
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
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