MS - Unit 3 - Mechanical Properties of Materials - Quiz 2

During a tensile test on a ductile material ____________

• Nominal stress at fracture is higher than the ultimate stress

• True stress at fracture is higher than the ultimate stress

• True stress a fracture is the same as the ultimate stress

• None of the mentioned

When equal and opposite forces applied to a body, tend to elongate it, the stress so produced, is called ____________

• Shear stress

• Compressive stress

• Tensile stress

• Transverse stress

In a tensile test, near the elastic limit zone ____________

• Tensile stress increases in linear proportion to the stress

• Tensile stress increases at a faster rate

• Tensile stress decreases at a faster rate

• None of the mentioned

The phenomenon of slow growth of strain under a steady tensile stress is called ____________

• Yielding

• Creeping

• Breaking

• None of the mentioned

In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is

• More

• Less

• Same

• More/Less depending on composition

In a tensile test, near the elastic limit zone, the

• Tensile strain increases more quickly

• Tensile strain decreases more quickly

• Tensile strain increases in proportion to the stress

• Tensile strain decreases in proportion to the stress

Tensile test can be performed on

• Impact testing machine

• Universal testing machine

• Rockwell tester

• Brinell tester

Which machine records the change in length of specimen?

• Impact testing machine

• Universal testing machine

• Rockwell tester

• Brinell tester

The ability of the material to resist stress without failure is called

• Strength

• Hardness

• stiffness

• toughness

_____ occurs when metal is subjected to a constant tensile load at an elevated temperature?

• Fatigue

• Creep

• Impact

• Wear