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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

German silver contains_________________?
A 1% silver
B 2.5% silver
C 5% silver
D 10% silver
Correct Answer: 5% silver
Dow metal contains____________________?
A 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
B 92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg
C 90% aluminium and 90% copper
D 90% magnesium and 9% aluminium with some copper
Correct Answer: 90% magnesium and 9% aluminium with some copper
Age-hardening is related with______________?
A stainless steel
B gun metal
C german silver
D duralumin
Correct Answer: duralumin
Acidic 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: less than 7
Following elements have face-centred cubic structure__________________?
A gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt
B Mg, Zn, Ti, Zr, Br, Cd
C a iron (below 910°C and between 1400 to 1539°C), W
D all of the above
Correct Answer: gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt
The transistor is made of___________________?
A silver
B gold
C copper
D germanium
Correct Answer: germanium
Pearlite is a combination of___________________?
A ferrite and cementite
B cementite and gamma iron
C ferrite and austenite
D ferrite and iron graphite
Correct Answer: ferrite and cementite
Lead is poured into the joint between two pipes. These pipes may be made of____________________?
A cast iron
B vitrified clay
C asbestos cement
D concrete
Correct Answer: cast iron
Austenite rs a combination of_________________?
A ferrite and cementite
B cementite and gamma iron
C ferrite and austenite
D ferrite and iron graphite
Correct Answer: cementite and gamma iron
Recrystallisation temperature can belowered by_________________?
A purification of metal
B grain refinement
C working at lower temperature
D all of the above
Correct Answer: all of the above

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