A. Do not increase in plasticity with rise in temperature
B. Allow slip to occur between molecules
C. Do not take on a permanent set
D. None of these
Related Mcqs:
- Thermosetting polymers are_________________?
A. Injection moulded
B. Cast molded
C. Extruded
D. None of these - Thermoplastic resins are those polymers, which____________________?
A. Has decreased plasticity at increasing temperature
B. Cannot be moulded
C. Easily deform under pressure at high temperature
D. None of these - Plasticisers are added to polymers to improve their____________________?
A. Tensile strength
B. Softness & flexibility
C. Acid resistance
D. Alkali resistance - Karbate is____________________?
A. A mixture of iron dust and saw dust
B. Carbon impregnated with resin (usually Bakelite)
C. An acid resistant material
D. Both B. and C. - Which of the following has no effect on the carbide forming tendency in steels ?
A. Molybdenum
B. Phosphorus
C. Chromium
D. Vanadium - Beehive coke ovens are made of ________________ bricks?
A. Silica
B. Fireclay
C. Silicon carbide
D. Corundum - A metallic alloy in which one of the constituent metal is _____________, is called an amalgam?
A. Zinc
B. Mercury
C. Lead
D. Tin - Stainless steel contains_________________?
A. Chromium and nickel
B. Copper
C. Aluminium
D. Vanadium - Age hardening is concerned with_________________?
A. Copper
B. Brass
C. Duralumin
D. Silver - A magnetic material becomes ____________ above the Curie temperature?
A. Ferromagnetic
B. Diamagnetic
C. Paramagnetic
D. None of these
