List of top Mechanical Engineering Questions

In which one of the following materials the heat energy propagation is minimum due to conduction heat transfer?

For an insulated tip, the fin efficiency is given by

All the failure theories give nearly the same results when

Match List-I with List-II

List-I	List-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:

According to maximum shear stress failure theory, yielding in material occurs when:

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 strain energy stored in a body due to a suddenly applied load compared to when it is applied gradually is

In a psychrometric chart, what does a vertical downward line represent?

Automated Guided Vehicle (AGV) robots can be placed in the category of:

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 critical speed of a rotating shaft depends upon

Bernoulli's theorem deals with the law of conservation of

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 \( k \).

Match List-I with List-II

List-I (Details of the processes of the cycle)	List-II (Name of the cycle)
(A) Two adiabatic, one isobaric and two isochoric	(I) Diesel
(B) Two adiabatic and two isochoric	(II) Carnot
(C) Two adiabatic, one isobaric and one isochoric	(III) Dual
(D) Two adiabatics and two isothermals	(IV) Otto

Choose the correct answer from the options given below:

Match List-I with List-II

Choose the correct answer from the options given below:

If \( \frac{d}{dx}(y) = y \sin 2x \) and \( y(0) = 1 \), then what is the required solution?

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:

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:

Sine bar is specified by:

V-block used in the workshop to check:

The DC power source for arc welding has the characteristics \( 3V + I = 240 \), where 'V' is the voltage in volts and 'I' is the current in amperes. For maximum power at the electrode, voltage should be set at:

The equation of free vibration of a system is \( X + 36\pi^2 X = 0 \). Its natural frequency is:

The ratio of is given as \( \frac{E{\lambda}_1 b_2}{E{\lambda}_1 b_1} \) is given 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

What are the absolute maximum value and the absolute minimum value of a function \( f(x) = \sin x + \cos x \) in the interval \( [0, \pi] \)?