20 Questions
Hot and cold rolling are commonly used methods for fabricating metals and alloys. (True/False)
True
A sheet of a 70% Cu – 30% Zn alloy is cold-rolled 20% to a thickness of 3mm, and then further cold-rolled to 2.00mm. The total percent cold work is 46.6%. (True/False)
True
The percent cold reduction when an annealed copper wire is cold drawn from a diameter of 1.27mm to a diameter of 0.813mm is -59%. (True/False)
True
Forging is a method used for obtaining wires and rods with different diameters. (True/False)
True
Melting the metal in a furnace is the first step in processing most metals. (True/False)
True
When a metal returns to its original dimensions after the force is removed, it has undergone __________ deformation.
False
If a metal is deformed to an extent that it cannot fully recover its original dimensions, it is said to have undergone __________ deformation.
False
The three principal ways in which a load may be applied are tension, compression, and __________.
False
The engineering stress is defined as the average uniaxial tensile force divided by the original cross-sectional area. (True/False)
True
Poisson’s Ratio measures a material's ability to compress in the direction parallel to the applied force. (True/False)
False
Alloying elements cannot be added to the molten metal to produce alloys. (True/False)
False
Cold rolling is used to obtain much thinner sheets than hot rolling. (True/False)
True
The total percent cold work for the sheet cold-rolled from 3mm to 2.00mm is 20%. (True/False)
False
Cold reduction is calculated by the change in cross-sectional area divided by the original area. (True/False)
True
Forging is a method used for obtaining wires and rods with different diameters. (True/False)
True
If a piece of metal is deformed to the extent that it cannot fully recover its original dimensions, it is said to have undergone elastic deformation.
False
The three principal ways in which a load may be applied are tension, compression, and torsional.
True
Engineering stress is defined as the average uniaxial tensile force divided by the original cross-sectional area.
True
Poisson’s Ratio measures a material's ability to compress in the direction parallel to the applied force.
False
If a rubber band becomes thinner when stretched or thicker when compressed, it has a Poisson’s Ratio of 1.
False
Test your knowledge about how metals respond to external loads and the processes involved in fabricating metals and alloys such as hot and cold rolling. This quiz covers the basics of melting metals, adding alloying elements, and producing long lengths of metal sheet and plate.
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