177) which of the following metal is used in making electrical resistance wire for electric furnace and heating elements?
Answer is:
Nichrome
Related Engineering Materials MCQ with Answers
Answer is:
are formed into shape under heat and pressure and results in a permanently hard product
Answer is:
do not become hard with the application of heat and pressure and so chemical change occurs
Answer is:
formed by condensation polymerization
Explanation:
Thermosetting plastics are formed by condensation polymerization, whereas thermoplastics are plastic polymer substances formed by the addition polymerization process. Thermosetting plastics become permanently hard on the application of heat but do not soften on further heating.
