Thermosetting polymers are
(A) Injection moulded
(B) Cast molded
(C) Extruded
(D) None of these

1 Answer

Answer :

(B) Cast molded

Related questions

Description : The thermosetting plastic (A) Becomes rigid when moulded at suitable pressure and temperature (B) At 127°C to 177°C permanently set and further application of heat does not soften it (C) Chars at 343°C (D) All the above

Last Answer : Answer: Option D

Description : 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

Last Answer : (C) Easily deform under pressure at high temperature

Description : Cross linked polymers are (A) Thermoplastic (B) Thermosetting (C) Either (A) or (B) (D) Fibres only

Last Answer : (B) Thermosetting

Description : Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their (A) Molecular sizes (B) Magnitude of intermolecular forces (C) Resistance to heat (D) Polymerisation mechanism

Last Answer : (B) Magnitude of intermolecular forces

Description : Thermosetting resins/polymers as compared to thermoplastic ones are (A) Soluble in all organic solvents (B) More brittle (C) Formed by addition polymerisation only (D) Easily reshaped & reused

Last Answer : (B) More brittle

Description : Linear polymers are normally (A) Thermosetting (B) Thermoplastic (C) Elastometric (D) Having extremely high softening poin

Last Answer : (B) Thermoplastic

Description : Thermosetting polymers as compared to thermoplastic polymers (A) Are formed by addition polymerisation (B) Have three dimensional structure (C) Have linear structure (D) None of these

Last Answer : (B) Have three dimensional structure

Description : Pick out the wrong statement. (A) Linear polymers are formed from bifunctional groups only and are normally thermoplastic (B) Cross-linked branched chain polymers are either elastometric or ... (D) Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction

Last Answer : D) Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction

Description : Which of the following types of polymers has the strongest inter particle forces? (A) Elastomers (B) Fibres (C) Thermoplastics (D) Thermosetting polymers

Last Answer : (D) Thermosetting polymers

Description : Cross linked polymers formed from bi-and trifunctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer __________ properties. (A) Thermoplastic (B) Thermosetting (C) Elastometric (D) Brittleness

Last Answer : (C) Elastometric

Description : Thermosetting resins are those polymers, which (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

Last Answer : (A) Do not increase in plasticity with rise in temperature

Description : While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by the (A) Low impact strength (B) High flexibility (C) Better finish and surface appearance (D) High plastic deformation

Last Answer : A) Low impact strength

Description : __________ moulding is used for shaping of thermosetting plastics exclusively. (A) Compression (B) Injection (C) Transfer (D) Extrusion

Last Answer : (C) Transfer

Description : Polymers which soften on heating and harden when cooled are (a) Cross-linked polymers (b) Copolymers (c) Thermosetting polymers (d) Thermoplastics

Last Answer : Thermoplastics

Description : List any four properties of thermosetting polymers.

Last Answer : Properties of thermosetting polymers:  1.Very poor elasticity 2.sronger attractive forces between chains 3. not soluble in organic compounds 4.can not be remoulded 5. these polymers produces by condensation polymerization

Description : Differentiate between Thermoplastic and Thermosetting polymers.

Last Answer : Differentiate between Thermosetting and Thermoplastic polymers: Thermosetting Thermoplastic Polymers which once mould /shaped do not soften when heated and thus cannot be reshaped  Polymers whose ... tri, tetra or poly functional. Monomer used in this polymer bi functional.

Description : Aqueous nitric acid is stored in __________ vessel. (A) Plain carbon steel (B) Stainless steel (C) Cast iron (D) Thermosetting plastic material

Last Answer : (C) Cast iron

Description : In extrusion of metals, which of the following statement is true? (A) Speed of the extruded material is same as that of ram speed (B) Redundant work is a function of the die angle (C) ... the billet surface and the container wall is always present (D) Hollow ram is used for indirect extrusion

Last Answer : (D) Hollow ram is used for indirect extrusion

Description : Polyvinyl acetate is never used for making (A) Moulded articles (B) Fibres (C) Adhesives

Last Answer : (A) Moulded articles

Description : what are extruded plastics

Last Answer : Need Answer

Description : What safety precaution should you take when working with extruded polytetrafluoroethylene insulated wiring?

Last Answer : Avoid breathing the vapors when the insulation is heated.

Description : A sulphate salt of group 2 element of the periodic table is white ,soft substance which can be moulded into different shapes by making its dough.Identify the salt . (a) CaSO4.1/2 H2O (b) CaSO4.2H2O (c) 2CaSO4. 1⁄2 H2O (d)CaSO4

Last Answer : (a) CaSO4.1/2 H2O

Description : Pick up the correct statement from the following: (A) The average crushing strength of hand moulded bricks is 6000 t/m2 (B) The average tensile strength of hand moulded brick is 200 t/m2 (C) The average shearing strength of hand moulded brick is 600 t/m2 (D) All the above

Last Answer : Answer: Option D

Description : Ornamental moulded course placed on the top of a wall, is (A) Cornice (B) Coping (C) Frieze (D) Lintel

Last Answer : Answer: Option A

Description : Making 'jelly' molded toys?

Last Answer : The material is called Plastisol. It’s used to mold fake worms and other soft fishing lures, so it’s fairly easy to find online. Here’s one source. Here are some basic instructions on how to use it.

Description : Has memetics molded our moral beliefs?

Last Answer : What do you think religion is? Yes, memetics has an influence on our moral beliefs. Great question, too.

Description : What is the fungus on an Azalea bush that looks like molded popcorn?

Last Answer : Need Answer

Description : What is the fungus on an Azalea bush that looks like molded popcorn?

Last Answer : Need Answer

Description : What are some important people or events that molded George Washington's character?

Last Answer : The Revolutionary war.

Description : What are some important people or events that molded George Washington's character?

Last Answer : The Revolutionary war.

Description : How will a molded-case circuit breaker react after it has tripped, as a result of an overloaded circuit? A. The breaker will trip again if immediately reset. B. The breaker handle will lock in ... down. D. The breaker handle cannot be moved to the OFF position until the thermal element cools down.

Last Answer : Answer: A

Description : When the operating handle of a molded case circuit breaker is in the mid-position, it indicates the circuit breaker is _____________. A. in the 'opened' position B. in the 'closed' position C. tripped D. reset

Last Answer : Answer: C

Description : When the operating handle of a molded-case circuit breaker is in the mid-position, the circuit breaker is indicated as being ____________. A. in the 'closed' position B. in the 'opened' position C. tripped D. reset

Last Answer : Answer: C

Description : When the operating handle of a molded-case circuit breaker is in the mid-position, this indicates that the circuit breaker is _____________. A. on B. off C. reset D. tripped

Last Answer : Answer: D

Description : Protection against sustained overloads occurring in molded-case circuit breakers is provided by a/an __________. A. overvoltage release B. thermal acting trip C. thermal overload relay D. current overload relay

Last Answer : Answer: B

Description : A molded-case circuit breaker provides protection against short circuits by using a/an ________________. A. electromagnet B. shading coil C. arc quencher D. burn away strip

Last Answer : Answer: A

Description : A molded-case breaker provides protection against short circuits by using a/an ____________. A. shading coil B. arc quencher C. electromagnet D. holding coil

Last Answer : Answer: C

Description : How To Make Molded Paper Sculptures

Last Answer : Instead of rolling the paper pulp into sheets as described under Making Paper' in Fun Things section, you can pack the pulp into clear candy molds of all shapes and sizes. Press the pulp deep ... sculpture may then be painted, decorated with ribbons, mounted and framed, or become part of a collage.

Description : How To Make Molded Bird Seed Cakes Recipe

Last Answer : Ingredients: 3 T. fat drippings 4 cups miniature marshmallows 6 cups bird seed Instructions: Melt the fat and marshmallows together. Then add the birdseed. Mix well and coat all seeds. Then press the ... seed cake. They make nice gifts too; don't forget to give the recipe along with the cake.

Description : Thermosetting materials (A) Are cross-linked molecules (B) Soften on application of heat (C) Are solvent soluble (D) None of these

Last Answer : (A) Are cross-linked molecules

Description : Nylon-6 is a (A) Polyamide (B) Thermosetting resin (C) Polyester (D) None of these

Last Answer : (A) Polyamide

Description : Gutta percha rubber is (A) Soft & tacky at room temperature (B) An isomer of natural rubber (C) A thermosetting resin (D) Recovered by coagulation of rubber latex

Last Answer : (B) An isomer of natural rubber

Description : Polymethyl methacrylate (PMMA) which is also known as Perspex and is produced by bulk polymerisation of methyl methacrylate is not a __________ polymer. (A) Thermoplastic (B) Thermosetting (C) Linear (D) Glass like transparent

Last Answer : (B) Thermosetting

Description : Dacron is a (A) Condensation polymerisation product of Hexamethylene diamine and adipic acid (B) Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol (C) Thermosetting material (D) None of these

Last Answer : (D) None of these

Description : Thermosetting plastic materials (A) Can be repeatedly melted (B) Is useful for melt casting (C) Cannot be melted after forming (D) Is useful for spinning

Last Answer : (C) Cannot be melted after forming

Description : Polyvinyl chloride (PVC) (A) Is produced by Polycondensation reaction (B) Uses either emulsion or suspension polymerisation methods (C) Can be made thermosetting by adding a plasticiser (D) Softening temperature is 200°C

Last Answer : (B) Uses either emulsion or suspension polymerisation methods

Description : Elastomers are (A) Thermosetting material (B) Exemplified by protein derivatives (C) Having high flexural strength (D) Having very high tensile strength and heat resistance

Last Answer : (C) Having high flexural strength

Description : __________ is a thermosetting plastic. (A) PVC (B) Polythene (C) Bakelite (D) Polystyrene

Last Answer : (C) Bakelite

Description : Poly Vinyl chloride (PVC) is a __________ material. (A) Thermoplastic (B) Thermosetting (C) Fibrous (D) Chemically active

Last Answer : (A) Thermoplastic

Description : All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it cannot be used for the production of plastic (A) Filaments (B) Pipes (C) Buckets (D) Tubings

Last Answer : (C) Buckets