List of top Mechanical Engineering Questions

Which planes carry maximum normal stress and what is shear stress on these planes

The relation of three elastic constants of a metal in terms of Young's Modulus (E), Modulus of rigidity (G) and Bulk Modulus (K) is expressed as

If a particle has the initial velocity of \( v_0 = 12\text{ m/s} \) to the right at \( S_0 = 0 \). Then what is the position when \( t = 10\text{ s} \) and \( a = 2\text{ m/s}^2 \) to the left?

Based on the limiting factor to prevent bursting in thin cylinder, the design is primarily made based on which stress

A tapering bar varying from the diameters from ‘d\(_1\)' to ‘d\(_2\)' and a bar of uniform cross section ‘d' have the same length and subjected to same axial pull attains the same extension. Then the ‘d' is equal to

The simple truss structure is shown below. The forces acting in the members AB and BC respectively are

If the double threaded square screw is having mean diameter \( 8\text{ cm} \) and pitch \( 2\text{ cm} \), then the lead of the double threaded square screw is

The range of projectile is maximum when the angle of projection is

Two equal forces each of magnitude P acting at a point with an angle of \( (\alpha) \), then the resultant force is

Three coplanar equilibrium forces \( P = 40\text{ N} \), \( Q = x\text{ N} \) and \( R = y\text{ N} \) are acting on a body and the body is said to be in equilibrium when the angle included between each other is \( 120^\circ \), then \( x = \)

The critical speed of the shaft is affected by the

A governor is said to be stable, if the radius of rotation of balls

For the better dynamic performance of cam follower mechanism, the following displacement diagrams should be chosen

Which of the following statements are associated with the complete dynamic balancing of rotating systems?
I. Resultant couple due to all inertia forces is zero
II. Support reactions due to forces are zero but not due to couples
III. The system is automatically statically balanced
IV. Centre of masses of the system lies on the axis of rotation

In general, a sudden jump in the bending moment diagram is due to the following type of loading condition?

In a CI engine, the delay period in the combustion process mainly corresponds to

A balloon containing an ideal gas is initially kept in an evacuated and insulated room. If the balloon ruptures and the gas fills the entire room, what is the correct statement at the end of the process?

The maximum amount of low grade energy, which is convertible into work is known as

While designing the gating system, the ratio of 1 : 2 : 4 represents:

The extrusion process used to manufacture the short length components like paste tubes, gun shells etc., is

If the material has the tendency to fracture without any appreciable deformation is known as

The heat treatment process used to enrich the steel surface by addition of Nitrogen is known as

In casting process, the covering passage is used for feeding the liquid metal into the mould to

The commonly used casting process for producing intricate and detailed sculptures is:

In a graphical solution of solving Linear Programming Problem to convert inequalities into equations, they