List of top Mechanical Engineering Questions asked in AP PGECET

In rolling of metals, when reduction per pass is increased while all other conditions are kept constant, the required rolling force

Which dimensionless number characterizes the ratio of convective to conductive heat transfer in a fluid?

Angle of twist of a shaft of diameter 'd' is inversely proportional to

For an air refrigeration cycle, COP improves when

What is the main cause of irreversibility in thermodynamic processes?

The ratio of modulus of rigidity to modulus of elasticity for a Poisson's ratio of 1 would be

In a concentric tube counter flow heat exchanger, hot oil enters at $102\text{ }^{\circ}\text{C}$ and leaves at $65\text{ }^{\circ}\text{C}$. Cold water at $25\text{ }^{\circ}\text{C}$ and leaves at $42\text{ }^{\circ}\text{C}$. The log mean temperature difference (LTMD) is _______}

A solid cylinder of diameter 100 mm and height 50 mm is forged between two frictionless flat dies to a height of 25 mm. The percentage change in diameter is

In free convection, which dimensionless number represents the ratio of buoyancy forces to viscous forces?

The control volume approach in fluid mechanics is primarily used to analyse:

Which of the following processes is an example of an isothermal process?

Determine the atmospheric pressure at a location where the barometric reading is 700 mmHg and the gravitational acceleration is $g = 10 \text{ m/s}^2$. Assume the mercury density is $14000 \text{ kg/m}^3$.

What happens to the entropy of a pure substance during a phase change at constant temperature and pressure?

In a Diesel cycle, the parameter that affects efficiency in addition to compression ratio is

A solid uniform metal bar of diameter D and length L is hanging vertically from its upper end. The elongation of the bar due to self-weight is

Consider an ideal vapour compression refrigeration cycle working on R-134a refrigerant. The COP of the cycle is 10 and the refrigeration capacity is 150 kJ/kg. The heat rejected by the refrigerant in the condenser is _______ kJ/kg.

What happens to the total potential energy of a system if the external work done by applied loads is greater than the increase in internal strain energy?

The truss which follows the law $n =$ _________ is known as simple truss

The critical speed of a rotating shaft depends on

Which of the following is NOT a characteristic of a transportation problem?

The values of a function \(f(x)\) obtained for different values of x are given below

Using Simpson's one-third rule, the value of \(\int_{0}^{1} f(x) dx\) is approximately equal to ______}

A continuous random variable X has a probability density function \[ f(x) = \begin{cases} 3x^{2}, & \text{if } 0 \leq x \leq 1 0, & \text{otherwise} \end{cases} \] If \(P(X \leq a) = P(X > a)\), then the value of a is equal to _______

If A, B and C are mutually exclusive and exhaustive events of a random experiment such that \(P(A) = \frac{1{3} P(B)\) and \(P(B) = 2 P(C)\), then \(P(A \cup C)\) is equal to _______}

Let \(A = \begin{pmatrix} 2026 & 2025 & 2024 \\ 2025 & 2024 & 2023 \\ 2024 & 2023 & 2023 \end{pmatrix}\) be a matrix. Then, \(\det(A)\) is equal to _______

If a \(2 \times 2\) matrix \(A\) has eigenvalues 1 and 4 with the corresponding eigenvectors \(\begin{pmatrix} 1 \\ -1 \end{pmatrix}\) and \(\begin{pmatrix} 2 \\ 1 \end{pmatrix}\), respectively, then \(A\) is ________