1. What is work hardening?
Work hardening is the increase in strength that Occurs in metals when they are strained. It is also called strain hardening,
2. Define the recrystallization temperature for a metal?
The recrystallization temperature is the temperature at which a metal recrystallizes (forms new grains) rather than work hardens when deformed.
3. What is a tolerance?
A tolerance is defined as the total amount by which a specified dimension is permitted to vary.
4. What does the term refractory mean?
Refractory means the capability to withstand high temperature service.
5. Define tensile strength of a material?
The tensile strength is the maximum load experienced during the tensile test divided by the original area.
6. Define yield strength of a material?
The yield strength is the stress at which the material begins to plastically deform. It is usually measured as the 0.2% offset value, which is the point where the stress-strain curve for the material intersects a line that is parallel to the straight-line portion of the curve but offset from it by 0.2%.
7. What is Accuracy?
Accuracy is the closeness of agreement between a test result and the accepted reference value.
8. What is precision?
Precision is the closeness of agreement between independent test results obtained under stipulated conditions.
9. What is fatigue failure?
Failure of a material occurs due to repeated loading and unloading.
10. What is steady flow of fluid?
A steady flow is one in which the conditions (velocity, pressure and cross-section) may differ
From point to point but do not change with time.
11. What is compressible fluid?
If the density of a fluid varies significantly due to moderate changes in pressure or temperature, then the fluid is called compressible fluid.
12. What is laminar flow?
If the flow is smooth and if the layers in the flow do not mix macroscopically then the flow is called laminar flow.
13. What is the effect of Temperature on Viscosity in liquid?
When temperature increases the distance between molecules increases and the cohesive force
Decreases. So, viscosity of liquids decreases when temperature increases.
14. What is drift?
Drift is a slow change of a metrological characteristic of a measuring instrument.
15. What is Pascal’s law?
Pascal’s law which states that the pressure at a point in a fluid at rest is equal in magnitude in all directions
16. What is uniform flow of fluid?
If the flow velocity is the same magnitude and direction at every point in the fluid it is said to be uniform.
17. Define specific heat as a material property?
Specific heat is defined as the quantity of heat required to raise the temperature of a unit mass of the material by One degree.
18. What is thermal conductivity as a material property?
Thermal conductivity is the capacity of a material to transfer heat energy through itself by thermal movement only (no mass transfer).
19. What is forging?
Forging is a deformation process in which the work piece is compressed between two dies, using impact or gradual pressure to form the part.
20. What is viscosity?
Viscosity is that property of a real fluid by virtue of which it offers resistance to shear force.
t = m du
dy
Work hardening is the increase in strength that Occurs in metals when they are strained. It is also called strain hardening,
2. Define the recrystallization temperature for a metal?
The recrystallization temperature is the temperature at which a metal recrystallizes (forms new grains) rather than work hardens when deformed.
3. What is a tolerance?
A tolerance is defined as the total amount by which a specified dimension is permitted to vary.
4. What does the term refractory mean?
Refractory means the capability to withstand high temperature service.
5. Define tensile strength of a material?
The tensile strength is the maximum load experienced during the tensile test divided by the original area.
6. Define yield strength of a material?
The yield strength is the stress at which the material begins to plastically deform. It is usually measured as the 0.2% offset value, which is the point where the stress-strain curve for the material intersects a line that is parallel to the straight-line portion of the curve but offset from it by 0.2%.
7. What is Accuracy?
Accuracy is the closeness of agreement between a test result and the accepted reference value.
8. What is precision?
Precision is the closeness of agreement between independent test results obtained under stipulated conditions.
9. What is fatigue failure?
Failure of a material occurs due to repeated loading and unloading.
10. What is steady flow of fluid?
A steady flow is one in which the conditions (velocity, pressure and cross-section) may differ
From point to point but do not change with time.
11. What is compressible fluid?
If the density of a fluid varies significantly due to moderate changes in pressure or temperature, then the fluid is called compressible fluid.
12. What is laminar flow?
If the flow is smooth and if the layers in the flow do not mix macroscopically then the flow is called laminar flow.
13. What is the effect of Temperature on Viscosity in liquid?
When temperature increases the distance between molecules increases and the cohesive force
Decreases. So, viscosity of liquids decreases when temperature increases.
14. What is drift?
Drift is a slow change of a metrological characteristic of a measuring instrument.
15. What is Pascal’s law?
Pascal’s law which states that the pressure at a point in a fluid at rest is equal in magnitude in all directions
16. What is uniform flow of fluid?
If the flow velocity is the same magnitude and direction at every point in the fluid it is said to be uniform.
17. Define specific heat as a material property?
Specific heat is defined as the quantity of heat required to raise the temperature of a unit mass of the material by One degree.
18. What is thermal conductivity as a material property?
Thermal conductivity is the capacity of a material to transfer heat energy through itself by thermal movement only (no mass transfer).
19. What is forging?
Forging is a deformation process in which the work piece is compressed between two dies, using impact or gradual pressure to form the part.
20. What is viscosity?
Viscosity is that property of a real fluid by virtue of which it offers resistance to shear force.
t = m du
dy
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