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WorksheetsHomework #6- Metals
Total questions: 10
Worksheet time: 5mins
Which of the following are the four requirements that must be kept in mind when selecting substitute metals?
Strength, weight, corrosion resistance, and cost
Hardness, flexibility, color, and price
Density, malleability, conductivity, and expense
Toughness, elasticity, luster, and availability
Titanium falls between which two metals in terms of properties?
Copper and Zinc
Aluminum and Steel
Iron and Nickel
Silver and Gold
Annealing consists of:
Heating the metal and rapidly cooling it
Heating the metal to a specific temperature and then slowly cooling it
Cooling the metal without heating
Hammering the metal repeatedly
The two processes included in the heat treatment of aluminum alloys are:
Annealing and quenching
Solution heat treatment and precipitation heat treatment (aging)
Tempering and carburizing
Normalizing and nitriding
The purpose of heat treatment is to:
alter the physical and sometimes chemical properties of a material to achieve desired characteristics
reduce the weight of a material
change the color of a material
make a material electrically conductive
Which of the following is NOT a reason why aluminum is one of the most widely used metals in modern aircraft construction?
Lightweight
High strength-to-weight ratio
Corrosion resistance
Poor machinability
Ease of fabrication
The five basic stresses that metals may be required to withstand are:
tension, compression, shear, torsion, and bending
tension, expansion, contraction, twisting, and vibration
compression, elongation, shearing, heating, and cooling
bending, stretching, shrinking, cracking, and melting
The processes of changing the internal structure of a ferrous metal include:
heat treatment, cold working, and alloying
painting and coating
machining and welding
casting and forging
The two types of heat treatments applicable to aluminum alloys are:
Annealing and quenching
Solution heat treatment and precipitation heat treatment (aging)
Tempering and carburizing
Normalizing and nitriding
Drop forging is a process where:
a hammer is dropped onto a heated piece of metal to shape it in a die
metal is cooled rapidly to increase hardness
metal is cut into sheets using a press
a mold is filled with molten metal
