Mechanical Engineering

Q1 Thermoplastic materials are those materials which
are formed into shape under heat and pressure and results in a permanently hard product
are used as a friction lining for clutches and brakes
are flexible and can withstand considerable wear under suitable conditions
do not become hard with the application of heat and pressure and no chemical change occurs

Q2 Cast iron is a.
ductile material
malleable material
brittle material
tough material

Q3 The hardness is the property of a material due to which it.
can be drawn into wires
breaks with little permanent distortion
can cut another metal
can be rolled or hammered into thin sheets

Q4 Shock resisting steels should have
low hardness
toughness
low tensile strength
low wear resistance

Q5 Which of the following material has maximum ductility?
Mild steel
Nickel
Aluminium
Copper