List of top Nano Technology Questions

A cast iron beam shows a brittle fracture on the stress-strain diagram. What does this indicate about its elongation at break?
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?
The primary result of grain growth in a material is
The typical characteristic of a stress-strain diagram for cast iron
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?
A material is deformed by slip along a plane with a critical resolved shear stress (CRSS) of 150 MPa. What is the applied stress needed if the orientation factor is 0.45?
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?
A material undergoes recrystallization at 250\(^\circ\)C. If the material is heated to 300\(^\circ\)C, what process is most likely occurring?
If a face-centered cubic (FCC) crystal has a lattice parameter of 0.5 nm, calculate the atomic radius.
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?
What parameter in boundary layer theory represents the thickness of the layer in which the velocity increases from zero at the surface to 99\% of the free stream velocity?.
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?
The key factor in classifying furnaces used in metallurgical industries is
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?
In heat transfer, the Log Mean Temperature Difference (LMTD) is used in the design of
If a fluid has a Reynolds number of 5000 in a pipe. The type of flow is
A fluid flows through a pipe with a velocity that varies with time at a given point. What type of flow is this?
A fluid traveling through a horizontal pipe with a decreasing cross-sectional area experiences what kind of pressure change, assuming inviscid flow?
The critical Reynolds number for the transition from laminar to turbulent flow in a pipe is approximately
In which scenario is Bernoulli's equation modified to include a term for head loss?
Which equation would best describe the conservation of momentum for fluid flow in pipes?
What does the conservation of mass principle state for a fluid in motion?