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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

Basic solution is one which has pH value___________________?
A greater than 7
B equal to 7
C less than 7
D pH value has nothing to do with basic solution
Correct Answer: greater than 7
Neutral solution is one which has pH value__________________?
A greater than 7
B less than 7
C equal to 7
D pH value has nothing to do with neutral solution
Correct Answer: equal to 7
The correct composition of Babbit metal is__________________?
A 87.75% Sn, 4% Cu, 8% Sb, 0.25% Bi
B 90% Sn, 2% Cu, 4% Sb, 2% Bi, 2% Mg
C 87% Sn, 4% Cu, 8% Sb, 1% Al
D 82% Sn, 4% Cu, 8% Sb, 3% Al, 3% Mg
Correct Answer: 87.75% Sn, 4% Cu, 8% Sb, 0.25% Bi
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

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