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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

The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is__________________?
A same
B double
C half
D four times
Correct Answer: double
The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of_______________?
A friction
B limiting friction
C repose
D kinematic friction
Correct Answer: repose
In ideal machines__________________?
A mechanical advantage is greater than velocity ratio
B mechanical advantage is equal to velocity ratio
C mechanical advantage is less than velocity ratio
D mechanical advantage is unity
Correct Answer: mechanical advantage is equal to velocity ratio
In actual machines_______________?
A mechanical advantage is greater than velocity ratio
B mechanical advantage is equal to velocity ratio
C mechanical advantage is less than velocity ratio
D mechanical advantage is unity
Correct Answer: mechanical advantage is less than velocity ratio
A cable with a uniformly distributed load per horizontal meter run will take the following shape________________?
A straight line
B parabola
C hyperbola
D elliptical
Correct Answer: parabola
The necessary condition for forces to be in equilibrium is that these should be_________________?
A coplanar
B meet at one point ;
C both A. and B. above
D all be equal
Correct Answer: both A. and B. above
The algebraic sum of moments of the forces forming couple about any point in their plane is_________________?
A equal to the moment of the couple
B constant
C both of above are correct
D both of above are wrong
Correct Answer: equal to the moment of the couple
A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is \i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will____________________?
A remain horizontal
B slant up towards direction of pull
C slant down towards direction of pull
D unpredictable
Correct Answer: slant down towards direction of pull
Tangent of angle of friction is equal to__________________?
A kinetic friction
B limiting friction
C angle of repose
D coefficient of friction
Correct Answer: coefficient of friction
Limiting force of friction is the__________________?
A tangent of angle between normal-reaction and the resultant of normal reaction and limiting friction
B ratio of limiting friction and normal reaction
C the friction force acting when the body is just about to move
D the friction force acting when the body is in motion
Correct Answer: the friction force acting when the body is just about to move
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