Which of the following is a thermoplastic resin?(a) Casein(b) Phenol formaldehyde(c) Cellulose(d) Urea-formaldehydeThis question was posed to me in a national level competition.This is a very interesting question from Plastics topic in portion Steel, Timber, Mortar, Plastics, Non-Ferrous Metals and Alloys of Construction & Building Materials

Which of the following is a thermoplastic resin?(a) Casein(b) Phenol f

1.	Which of the following is a thermoplastic resin?(a) Casein(b) Phenol formaldehyde(c) Cellulose(d) Urea-formaldehydeThis question was posed to me in a national level competition.This is a very interesting question from Plastics topic in portion Steel, Timber, Mortar, Plastics, Non-Ferrous Metals and Alloys of Construction & Building Materials
Answer» Correct choice is (c) CELLULOSE To elaborate: Just like plastics, resins are ALSO classified into THERMOPLASTIC resins and thermosetting resins depending on their BEHAVIOUR with respect to HEATING. Cellulose is an example of thermoplastic resin. Phenol formaldehyde, casein and urea-formaldehyde are examples of thermosetting resins.

Discussion

No Comment Found

Related InterviewSolutions

Which of the following is not a property of mild steel?(a) Mild steel is ductile and malleable(b) It can be used for all types of structural work(c) It cannot be magnetised permanently(d) Mild steel can be easily forged and welded
Which of the following types of plastics have a high modulus of elasticity?(a) Rigid plastics(b) Semi-rigid plastics(c) Soft plastics(d) Elastomers
Which of the following defects occur in the seasoning process of wood?(a) Bow(b) Brown rot(c) Sap stain(d) Blue stain
Which of the following is not a property of good sand?(a) Good sand should be chemically inert(b) It should be clean(c) It should not contain any organic matter(d) It must contain salts that can attract moisture from the atmosphere
Which of the following is not a property of hard steel?(a) Hard steel can be readily forged and welded(b) It rusts easily(c) Hard steel can be magnetised permanently(d) The specific gravity of hard steel is 7.90
Homogeneous plastic is made of the chain containing only carbon atoms while heterogeneous plastic consists of the chain containing carbon and oxygen, nitrogen and other elements.(a) True(b) False
Steel can only take up compressive stresses while cast iron is equally strong in compression and tension.(a) True(b) FalseI have been asked this question in examination.My enquiry is from Steel in division Steel, Timber, Mortar, Plastics, Non-Ferrous Metals and Alloys of Construction & Building Materials
Which of the following is not a property of plastics?(a) Plastics are not ductile(b) Plastics are organic in nature(c) Plastics have good electric insulation properties.(d) PVC plastics are inflammable
Which of the following operations involved in mechanical treatment of steel is used to make wires and rods?(a) Forging(b) Drawing(c) Pressing(d) Rolling
Which of the following is available under trade names such as Formica, Sunmica, Sungloss etc?(a) Fibreboard(b) Veneer(c) Impreg timber(d) Compreg timber

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment