List of top Mechanical Engineering Questions

What is the correct order of the development of the following? A. Computer Numerical Control
B. Numerical Control
C. Distributed Numerical Control
D. Direct Numerical Control
What is the correct order of hydraulic actuator components arranged in hydraulic circuit? A. Check valve
B. Oil reservoir
C. Hydraulic pump
D. Filter
E. Direction control valve
Which of the following are not the solution of \( \frac{\partial^2 z}{\partial x^2} = \frac{\partial^2 z}{\partial y^2} \)? A. \(z = f(y+x) + f(y-x)\)
B. \(z = f(y+x) + f(y-x)\)
C. \(z = f(x^2 - y^2)\)
D. \(z = f(x^2 + y^2)\)
Arrange the fluids in the decreasing order of heat transfer coefficient \(h\) in forced convection regime for similar operating conditions: A. Air
B. Water
C. Mercury
D. Boiling water
The correct order of effective length \((L_e)\) of the column for the following support condition is: A. Pinned - Pinned
B. Fixed - Free
C. Fixed - Fixed
D. Pinned - Fixed
In modern steam generator, the correct path of gases from boiler furnace to chimney is: A. Boiler furnace
B. Economizer
C. Superheater
D. Air preheater
E. Chimney
A hydraulic power station has the following major items in the hydraulic circuit. The correct sequence in the direction of flow is: A. Draft tube
B. Runner
C. Guide wheel
D. Penstock
E. Scroll case
What is the correct sequence of inversion of a Slider crank chain from first inversion to fourth inversion? A. Rotary Engine
B. Reciprocating Engine
C. Oscillating Cylinder Engine
D. Hand pump
Assertion (A): Hydraulic Robots are used in heavy payload applications.
Reason (R): Hydraulic Robots have high power to size ratios.
A problem in Mathematics is given to three students P, Q and R whose chances of solving it are \(\frac{1}{2}, \frac{1}{3}, \frac{1}{4}\) respectively. Arrange the following probabilities in decreasing order: A. The probability that P cannot solve the problem
B. The probability that Q cannot solve the problem
C. The probability that P, Q and R cannot solve the problem
D. The probability that the problem will be solved by at least one student Choose the correct answer:
Arrange the following steps in correct sequence to construct Mohr’s circle for a given plane stress \((\sigma_x, \sigma_y, \tau_{xy})\): A. Plot center at \(\left(\frac{\sigma_x+\sigma_y}{2}, 0\right)\)
B. Identify principal stresses as horizontal intercepts
C. Plot points \(X(\sigma_x,-\tau_{xy})\) and \(Y(\sigma_y,\tau_{xy})\)
D. Connect points X and Y and draw a circle
A variate \(X\) has the probability distribution:
Arrange the following in increasing order:
A. \(E(X)\)
B. \(E(X^2)\)
C. \(E[(2X+1)^2]\)
D. \(\sigma^2\)
Assertion (A): Aluminium has poor weldability.
Reason (R): Aluminium has high thermal conductivity and high affinity to oxygen.
Assertion (A): In Electrical Discharge Machining (EDM), fragile parts can be machined without distortion because no mechanical work is involved.
Reason (R): The surface finish of the finished components made using EDM is poor because of presence of small craters.
Assertion (A): When a component is subjected to fluctuating stresses, Goodman line is more safe from design considerations.
Reason (R): Goodman line is completely inside the Gerber parabola and inside the failure points.
Assertion (A): In a power plant working on a Rankine cycle, the regenerative feed water heating improves the efficiency of the steam turbine.
Reason (R): The regenerative feed water heating raises the average temperature of heat addition in the Rankine cycle.
Assertion (A): When a thin flat plate is held parallel to a fluid stream, both pressure drag as well as viscous drag will be negligible.
Reason (R): The total drag on the plate will be entirely due to shear stress and pressure drag will be negligible.
Which task of vision systems recognize and classify an object?
How many degree of freedom is possessed by a manipulator link free in a 3-D space?
Assertion (A): Transmissibility is the ratio of force applied to the force transmitted.
Reason (R): Transmissibility is a measure of effectiveness of vibration isolating material.
Assertion (A): If \(P = \begin{bmatrix}1 & 4 \\ 2 & 3 \end{bmatrix}\), then \(P^2 - 4P - 5I = 0\).
Reason (R): Every square matrix satisfies its own characteristic equation.
Assertion (A): Any square matrix \(P\) and its transpose \(P^T\) have the same eigen values.
Reason (R): The eigen values of an idempotent matrix are either zero or unity.
In sensors, the response time is the time required:
When a control signal is generated proportional to rate of change of position error, the controller is:
Which type of robot possesses two revolute and one prismatic joint?