List of top Mechanical Engineering Questions asked in CUET (PG)

When a ball mill rotates at a speed higher than the critical speed, what happens to its efficiency?
Which mechanical drive is specifically used to impart a reciprocating or oscillatory motion to another body in contact?
What is the stress developed when a steel rod of radius \(10 \, \text{mm}\) is stretched by a \(100 \, \text{kN}\) force?
A ball is thrown vertically upward with a velocity of \(5 \, \text{m/s}\); if it takes 10 sec for the upward journey, how long does the downward journey take?
Which translatory joint in a robot configuration is known as a sliding joint?
What is the natural frequency of a free vibration system defined by the equation \( \ddot{X} + 36\pi^2 X = 0 \)?
The polar section modulus for a circular shaft of diameter \(d\) is given by which formula?
For a DC power source for arc welding with characteristics \(3V + I = 240\), what voltage \(V\) yields maximum power?
Forces whose line of action passes through a common point are known as what?
Which of the following is a coarse crusher used in mechanical operations?
The latent heat of vaporization at the critical point is
In which one of the following materials the heat energy propagation is minimum due to conduction heat transfer?
A Newtonian fluid is defined as the fluid which
Bernoulli's theorem deals with the law of conservation of
If 'A' is the optimistic time, 'B' is the pessimistic time and 'C' is the most likely time of an activity, then the expected time of activity is:
Match List-I with List-II
List-IList-II
(A) Work done in a polytropic process(IV) \( \frac{p_1 V_1 - p_2 V_2}{n - 1} \)
(B) Work done in a steady flow process(I) \( - \int v \, dp \)
(C) Heat transfer in a reversible adiabatic process(II) Zero
(D) Work done in an isentropic process(III) \( \frac{p_1 V_1 - p_2 V_2}{\gamma - 1} \)
Choose the correct answer from the options given below:
The thickness of a laminar boundary layer at a distance \( x \) from the leading edge over a flat plate varies as
Arrange the following elements of a feedback control loop in the correct order: (A) Actuator (B) Error detection (C) Controller (D) Feedback sensor Choose the correct answer from the options given below:
The height of a Watt's governor is expressed as
If \( \frac{d}{dx}(y) = y \sin 2x \) and \( y(0) = 1 \), then what is the required solution?
Which thermodynamics law predicts correctly the degree of completion of a chemical reaction?
The Nusselt number is related to the Reynolds number in laminar and turbulent flows respectively as:
A slider sliding at 15 m/s on a link which is rotating at 30 r.p.m, is subjected to Coriolis acceleration of magnitude
If \( A = \begin{bmatrix} 2 & -1 \\ -1 & 2 \end{bmatrix} \) satisfies the matrix polynomial equation \( A^2 - 4 + kI_2 = 0 \), then determine the value of \( k \).
A refrigerating machine working on a reversed Carnot cycle takes out 2 kW of heat from the system while working between temperature limits of 300K and 200K. The coefficient of performance and power consumed by the cycle will be respectively: