List of top Questions asked in Andhra Pradesh Post Graduate Engineering Common Entrance Test

One mole of an ideal gas expands isothermally and reversibly from 2 liters to 6 liters at a temperature of 300 K. Calculate the work done by the gas. (R=8.314 J/K/mol)
A 10 kg block slides down a frictionless incline from a height of 5 meters. Assuming the gravitational constant g=9.8 m/s\(^2\), calculate the kinetic energy of the block at the bottom of the incline.
Calculate the heat transferred when 50 g of water is heated from 20\(^\circ\)C to 80\(^\circ\)C. The specific heat capacity of water is (4)18 J/\(^\circ\)C\(^{-1}\)g\(^{-1}\)
What is the significance of the Gibbs-Helmholtz Equation in chemical thermodynamics?
How can the concept of maximum work be used to determine the efficiency of a thermodynamic cycle?
How does the Clausius-Clapeyron Equation help in meteorology?
Identify the equation typically used to describe the efficiency of a cyclic process.
A system undergoes isothermal reversible expansion. What is true about the work done by the system?
If the enthalpy change for a process at constant pressure is negative, what type of process is it likely to be?
Consider a process where the entropy change of the system is negative. What can be inferred if the process is spontaneous?
The type of defect involves an atom from an impurity substituting for a lattice atom is
The primary mechanism for deformation by twinning is
Which of the following crystal system has axes of equal length intersecting at 90-degree angles?
The effect of grain growth on the mechanical properties of a metal is
How does dislocation movement by cross-slip differ from climb?
Cold Working is primarily characterized by
The main mechanism of plastic deformation in metals is
The typical characteristic of a stress-strain diagram for cast iron
Which of the following is the effect of recrystallization on the properties of a material?
A cast iron beam shows a brittle fracture on the stress-strain diagram. What does this indicate about its elongation at break?
The primary result of grain growth in a material is
A steel bar exhibits a Hall-Petch relationship with a yield strength of 300 MPa when the average grain size is 10 micrometers. What trend in yield strength would you expect if the grain size is reduced to 5 micrometers?
In a tensile test, a ductile material exhibits necking after reaching its ultimate tensile strength. If the ultimate tensile strength is 500 MPa, what happens to the stress in the necked region?
A cubic crystal has a unit cell edge length of 0.4 nm. What is the volume of the unit cell?
During cold working, a metal experiences a 10\% reduction in cross-sectional area. If the original cross-sectional area was 1 cm\(^2\), what is the new cross-sectional area?