What is the importance of annealing? Annealing is a heat treatment process which alters the microstructure of a material to change its mechanical or electrical properties. Typically, in steels, annealing is used to reduce hardness, increase ductility and help eliminate internal stresses. What is annealing and its types? The process of heating a metal or […]
What is FCC crystal structure?
What is FCC crystal structure? Metallic Crystal Structures. FCC (face centered cubic): Atoms are arranged at the corners and center of each cube face of the cell. How many octahedral holes are there in the FCC? 4 octahedral holes What is the packing factor of FCC crystal structure? It can be proven mathematically that for […]
What is the difference between open die forging and closed die forging?
What is the difference between open die forging and closed die forging? While impression or closed die forging confines the metal in dies, open die forging is distinguished by the fact that the metal is never completely confined or restrained in the dies. Most open die forgings are produced on flat dies. What is open […]
Which of the two materials brittle vs ductile usually obtains the highest ultimate strength and why?
Which of the two materials brittle vs ductile usually obtains the highest ultimate strength and why? Answer: Explanation: Ductile materials typically have a higher ultimate strength because they stretch absorbing more energy before breaking. Why does a brittle material have a higher Young’s modulus than a ductile material? Because the area under the stress-strain curve […]
How do you find the molar mass of a gas?
Does porosity affect density?
Does porosity affect density? Looked at from the porosity perspective, bulk density increases as pore space decreases. The relationship of bulk density and porosity is reciprocal. As one increases, the other decreases. Generally speaking, loose, rich in organic matter, well aggregated and porous soils have a low bulk density. What is porosity composites? Porosity is […]
Why is counter flow heat exchanger better in terms of heat transfer?
Why is counter flow heat exchanger better in terms of heat transfer? Counter flow heat exchangers are inherently more efficient than parallel flow heat exchangers because they create a more uniform temperature difference between the fluids, over the entire length of the fluid path. For example, one fluid may make 2 passes, the other 4 […]
Do double pane windows reduce heat?
Do double pane windows reduce heat? Improve efficiency and save money: Double pane windows insulate better than single pane versions, making your home more efficient. A home that retains heat in winter and keeps heat out in summer is more affordable to heat and cool. In this way, double pane windows deliver savings to help […]
Which of the following is a eutectic substance?
Which of the following is a eutectic substance? Examples of Eutectic Systems Sodium chloride and water form a eutectoid when the mixture is 23.3% salt by mass with a eutectic point at -21.2 degrees Celsius. The system is used to make ice cream and to melt ice and snow. The eutectic point of the mixture […]