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

Identify the equation typically used to describe the efficiency of a cyclic process.
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
The effect of grain growth on the mechanical properties of a metal is
Cold Working is primarily characterized by
The main mechanism of plastic deformation in metals is
How does dislocation movement by cross-slip differ from climb?
Which of the following crystal system has axes of equal length intersecting at 90-degree angles?
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 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?
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
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?
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?
If a face-centered cubic (FCC) crystal has a lattice parameter of 0.5 nm, calculate the atomic radius.
Calculate the Burgers vector magnitude for a body-centered cubic (BCC) crystal with a lattice constant of 0.3 nm, assuming the dislocation is along the shortest lattice vector.
A cubic crystal has a unit cell edge length of 0.4 nm. What is the volume of the unit cell?
An aluminum alloy sample has a yield stress of 250 MPa and a modulus of elasticity of 70 GPa. What is the strain at yield point?
A material undergoes recrystallization at 250\(^\circ\)C. If the material is heated to 300\(^\circ\)C, what process is most likely occurring?
Which method is used to improve the efficiency of heat transfer in regenerators?
In a duct, if the flow enters at 1 kg/s and exits at 0.5 kg/s, what additional information is needed to use the continuity equation effectively?
In plane Couette flow, what determines the shear stress between the plates?
For a fluid element in a steady, uniform flow, which of the following statements is true regarding the flow velocity at any point in the flow field?