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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

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
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
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