List of top Mechanical Engineering Questions

The degrees of freedom of a SCARA robot are:
A vertical double-acting steam engine develops 75 kW at 250 r.p.m. The maximum fluctuation of energy is 30 percent of the work done per stroke. The maximum and minimum speeds are not to vary more than 1 percent on either side of the mean speed. What is the approximate mass of the flywheel required? If the radius of gyration is 0.6 m.
The thickness of a laminar boundary layer at a distance \( x \) from the leading edge over a flat plate varies as
Sine bar is specified by:
At a point on the beam where shear force changes signs, the bending moment at that point is
For an insulated tip, the fin efficiency is given by
The critical speed of a rotating shaft depends upon
The strain energy stored in a body due to a suddenly applied load compared to when it is applied gradually is
Name of the device that selects between several analog or digital input signals and forwards the selected input to a single output line:
During tensile tests on mild steel specimens, the following points are observed:
(A) Elastic limit
(B) Proportionality limit
(C) Yield Point
(D) Fracture point
Choose the correct sequence of observation after the application of loading:
After expansion from a gas turbine, the hot exhaust gases are used to heat the compressed air from a compressor with the help of a cross-flow compact heat exchanger of 0.8 effectiveness. What is the number of transfer units of the heat exchanger?
Critical speed of a shaft depends upon its
When there is a reduction in amplitude over every cycle of vibration, then the body is said to have
Maximum shear stress in a thin cylindrical shell subjected to internal pressure \( p \) is
As per Euler’s theory, the crippling load for a column of length \( l \) with one end fixed and the other end hinged having Young’s modulus \( E \) and moment of inertia \( I \) is
When a shaft is subjected to torsion, the shear stress induced in the shaft varies from ---- at the centre and ---- at the circumference.
If a slider moves at a velocity \( v \) on a link rotating at speed \( \omega \,\text{rad/s} \), the Coriolis component of its acceleration is
Critical damping is a function of
If the rotating mass of a rim type flywheel is distributed on a second rim type flywheel whose mean radius is half the mean radius of the former, then the energy stored in the second flywheel at the same speed will be ------- times that of the first flywheel
If \( \sigma_1 \) and \( \sigma_2 \) are two principal stresses, then the radius of Mohr’s circle is
The strain energy stored in a spring when it is subjected to maximum load without suffering permanent distortion is known as
The shear force at the fixed end of a cantilever beam of length \( l \) carrying a uniformly distributed load \( w \) per unit length is
The maximum bending moment of a simply supported beam of span \( l \) and carrying a point load \( W \) at the centre of the beam is
The maximum deflection of a fixed beam of length \( l \) carrying a total load \( W \) being uniformly distributed over the entire length is
Maximum height up to which a projectile can reach, if it is thrown upwards with initial speed \( u \) at an angle \( \theta \) with the ground surface, is