List of top Mechanical Engineering Questions

Match List-I with List-II.

List-IList-II
A. Gun metal
B. Monel
C. Inconel
D. Nichrome		I. Nickel 68%, Copper 29%, Others 3%
II. Nickel 65%, Chromium 15%, Iron 20%
III. Copper 88%, Tin 10%, Zinc 2%
IV. Nickel 80%, Chromium 14%, Iron 6%

Match List-I with List-II. Match the following filter characteristics with graph showing frequency versus magnitude along x and y axis, respectively:

Match List-I with List-II.

List-IList-II
A. Dummy activity
B. Critical path
C. PERT activity
D. Critical Path Method		I. Follow B distribution
II. Built on activity oriented diagram
III. Constructed only to establish sequence
IV. Has zero total slack

Match List-I with List-II.

List-I (Joint types)List-II (Joint symbols)
A. Revolute
B. Prismatic
C. Rotary
D. Twist

Match List-I with List-II.

List-IList-II
A. 50% reaction stage
B. Pressure-velocity compounded impulse stage
C. Single stage impulse
D. Two stage pressure compounded turbine		I. Rateau
II. Parsons
III. Curtis
IV. De-Laval

Match List-I with List-II (4-stroke petrol engine).

List-IList-II
A. Inlet valve opens (IVO)
B. Inlet valve closes (IVC)
C. Exhaust valve opens (EVO)
D. Exhaust valve closes (EVC)		I. 10°–15° after TDC
II. 30°–40° after BDC
III. 10°–20° before BDC
IV. 30°–50° before BDC

Match List-I with List-II.

List-IList-II
A. Lewis number (Le)
B. Peclet number (Pe)
C. Sherwood number (Sh)
D. Nusselt number (Nu)		I. Ratio of convection to diffusion mass transfer
II. Ratio of convection to pure conduction heat transfer
III. Ratio of thermal and mass diffusivities
IV. Ratio of advection to conduction heat transfer

Match List-I with List-II.

List-IList-II
A. Toughness
B. Endurance Strength
C. Resistance to Abrasion
D. Deflection in beam		I. Moment area method
II. Hardness
III. Energy absorbed before fracture
IV. Fatigue loading

Match List-I with List-II.

List-IList-II
A. Scotch-Russell Mechanism
B. Geneva Mechanism
C. Off-set slider crank mechanism
D. Scotch yoke mechanism		I. Intermittent motion
II. Quick return motion
III. Simple harmonic motion
IV. Straight line motion

Which of the following terms are related to active compliance provided in a robot to correct lateral and angular errors? A. Controller
B. Remote Centre Compliance
C. Software
D. Sensors
Which of the following are External Sensors? A. Tachometer sensor
B. Ultrasonic sensors
C. Laser sensors
D. Vision sensors
E. Potentiometer sensors

Match List-I with List-II.

List-I (Cauchy Integral)List-II (Value)
A. \( \displaystyle \oint_C \frac{\sin z + \cos \pi z}{(z-1)(z-2)} dz \)
B. \( \displaystyle \oint_C \frac{dz}{(z+1)^4} \)
C. \( \displaystyle \oint_C \frac{e^z}{(z+2)^2} dz \)
D. \( \displaystyle \oint_C \frac{\sin z}{z^2} dz \)		I. \( \frac{8\pi i e^{-2}}{3} \)
II. \(4\pi i\)
III. \( \frac{\pi i}{32} \)
IV. \( \frac{i}{\pi} \)

Match List-I with List-II.

List-I (Method)List-II (Rate of convergence)
A. Bisection method
B. Secant method
C. Newton-Raphson method
D. Muller method		I. 2
II. 1
III. 1.84
IV. 1.618

Match List-I with List-II.

List-I (Complex integrate)List-II (Value)
A. \( \displaystyle \int_{0}^{2\pi} \cos^2 x \, dx \)
B. \( \displaystyle \int_{0}^{\pi} \cos x \, dx \)
C. \( \displaystyle \oint_C dz \), where \(C\) is a simple closed curve
D. \( \displaystyle \oint_C \frac{dz}{z^2-1} \), around circle \(|z-1|=1\)		I. \(4\pi i\)
II. \(0\)
III. \(\frac{\pi}{4}\)
IV. \( \frac{1}{4}\cosh 2 - \frac{1}{2}\sinh 2 + \frac{1}{2}\pi i \sinh 2 \)

Which type of motor is used in axis or spindle drives of CNC machine tools? A. Induction motor
B. Stepper motor
C. DC servo motor
D. Linear servo motor
The occurrence of casting defect "rat tail" is possible because of: A. soft ramming of sand
B. continuous large flat surface on the mould
C. excessive hardness of the mould
D. hard ramming of sand
Bernoulli’s equation \( \frac{p}{\gamma} + \frac{V^2}{2g} + z = \text{constant} \) is valid for: A. Incompressible flow
B. Steady flow
C. Viscous flow
D. Flow along a streamline
E. Rotational flow
In transportation problem, North-West corner method would yield: A. an optimum solution
B. an optimal feasible solution
C. an initial non-feasible solution
D. Vogel’s approximate solution
Which of the following are intensive properties? A. Kinetic energy
B. Thermal conductivity
C. Pressure
D. Entropy
E. Volume
Which of the following are false about the differential equation: \[ (y^2 + y^3 + x^2y)\,dx + (2xy^2 - 4y^3)\,dy = 0 \] A. Linear, homogeneous and exact
B. Non-linear, homogeneous and exact
C. Non-linear, non-homogeneous and exact
D. Non-linear, non-homogeneous and inexact
For an underdamped system: A. Damping ratio is unity
B. Motion is periodic
C. System stop within least possible time
D. System vibrate at damped natural frequency
Which of the following assumptions are valid for truss members? A. Weight of members are considered
B. Force transmitted through smooth pins
C. Each truss is composed of flexible members
D. All loads are applied at the joints
When a component is subjected to varying (sinusoidal) load, which statements are correct: A. Mean stress is zero for fluctuating stress
B. Minimum stress is zero for repeated stress
C. Mean stress is zero for reversed stress
D. Amplitude stress is the average of minimum and maximum stress
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. \(z = f(x^2 + y^2)\)
Choose the correct order of different alloying elements present in stainless steel based on their percentage composition: A. Ni (Nickel)
B. Fe (Iron)
C. Cr (Chromium)
D. C (Carbon)