Description : The material which can be deformed permanently by heat and pressure is called a: (1) Thermoplastic (2) Thermoset (3) Chemical compound (4) Polymer
Last Answer : (2) Thermoset Explanation: Thermoset materials are those materials that are made by polymers joined together by chemical bonds, acquiring a highly cross linked polymer structure. They cannot melt.
Description : The material which can be deformed permanently by heat and pressure is called a?
Last Answer : thermoset
Description : Bakelite is (A) Same as Polytetrafluoroethylene (PTFE) (B) An inorganic polymer (C) Same as thermoset phenol formaldehyde (D) Not a polymer
Last Answer : (C) Same as thermoset phenol formaldehyde
Description : What material can be permanently deformed without breaking?
Last Answer : What is the answer ?
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 : Silicone is a/an (A) Monomer (B) Inorganic polymer (C) Thermoplastic material (D) A natural polymer
Last Answer : (B) Inorganic polymer
Description : Which of the following is not a thermoplastic material? (A) Epoxy polymer (B) PVC (C) Polystyrene (D) Polythene
Last Answer : (A) Epoxy polymer
Description : What is Thermoplastic Polymer ?
Last Answer : Polypropylene thermoplastic polymer.
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 : Pick out the wrong statement. (A) Polystyrene is a thermoplastic polymer (B) Protein is a natural polymer (C) Neoprene is a natural rubber (D) Polythene is a copolymer, while SBR is a homopolymer
Last Answer : (C) Neoprene is a natural rubber
Description : Bakelite is a/an (A) Addition polymer (B) Elastomer (C) Thermoplastic (D) None of these
Last Answer : (D) None of these
Description : __________ polymer is used for making unbreakable crockery. (A) Thermoplastic (B) Melamine (C) Addition (D) None of these
Last Answer : (B) Melamine
Description : Silicone is a/an (A) Thermoplastic (B) Inorganic polymer (C) Monomer (D) None of these
Description : Compound is, A. Very accurate compression material B. Thermoplastic material
Last Answer : B. Thermoplastic material
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 : Energy in deformed solid is called A. stress energy B. potential energy C. kinetic energy D. strain energy
Last Answer : strain energy
Description : Polycondensation reaction of polymerisation (A) Does not produce linear polymers (B) Produces only thermoplastic material (C) Produces epoxy polymers (D) Does not need any catalyst
Last Answer : (C) Produces epoxy polymers
Description : Poly Vinyl chloride (PVC) is a __________ material. (A) Thermoplastic (B) Thermosetting (C) Fibrous (D) Chemically active
Last Answer : (A) Thermoplastic
Description : Polystyrene is a light, transparent, thermoplastic material used for making (A) Toys and combs (B) Packaging bags (C) Non-sticking utensils (D) Electrical insulation
Last Answer : (A) Toys and combs
Description : Pick out the wrong statement. (A) Pure rubber is as useless as pure gold as a material of construction (B) Thermal conductivity of aluminium is higher than that of copper; henceit is ... has poor weldability (D) Reinforced plastics are made from both thermoplastic as well as thermosetting plastics
Last Answer : (B) Thermal conductivity of aluminium is higher than that of copper; henceit is increasingly used for utensil making
Description : Poly Vinyl Chloride (P.V.C.) is a __________ material. (A) Thermosetting (B) Thermoplastic (C) Fibrous (D) Chemically active
Last Answer : (B) Thermoplastic
Description : Which of the following facts are true for resilience? a) Ability of material to absorb energy when deformed elastically b) Ability to retain deformation under the application of load or after removal ... c) Ability of material to absorb energy when deformed plastically d) None of the mentioned
Last Answer : a) Ability of material to absorb energy when deformed elastically
Description : Resilience is defined as the property of material to absorb energy when deformed _________ and to release this energy when unloaded. a) Elastically b) Plastically c) Up to fracture point d) None of the listed
Last Answer : a) Elastically
Description : A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material? (A) Steel (B) Glass (C) Rubber (D) Brass
Last Answer : Option A
Description : Thermoplastic materials (A) Do not soften on application of heat (B) Are heavily branched molecules (C) Are solvent insoluble (D) None of these
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 : Steel is more elastic than rubber because it – (1) requires larger deforming force (2) Is never deformed (3) is deformed very easily (4) is harder than rubber
Last Answer : (3) is deformed very easily Explanation: Elasticity is the capability of an object to return to its former shape once a load inducing strain is removed. Young Modulus or elastic modulus [tendency to be ... ., nonpermanently) when a force is applied to it] of steel is more than that of rubber.
Description : Steel is more elastic than rubber because it : (1) requires larger deforming force (2) is never deformed (3) is deformed very easily (4) is harder than rubber
Last Answer : is deformed very easily
Description : Which polymer is widely used for making bullet proof material?
Last Answer : – Polyethylene
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 : What is the name for a substance that alters the rate of chemical reactions, without being permanently altered itself?
Last Answer : ANSWER: CATALYST
Description : A material is able to retain the deformation permanently by virtue of its (A) Elasticity (B) Plasticity (C) Ductility (D) Malleability
Last Answer : (B) Plasticity
Description : Indicate which of the following material does not retain magnetism permanently. (a) Soft iron (b) Stainless steel (e) Hardened steel (d) None of the above
Last Answer : (a) Soft iron
Description : When stress is increased beyond elastic limit and material is permanently changed this property is a) Permanent stress b) Elasticity c) Yield strength d) Plasticity
Last Answer : d) Plasticity
Description : n a chemical factory where dyes are made, wet cake at 30 OC consisting of 60% moisture is put in a dryer to obtain an output having only 5% moisture, at atmospheric pressure. In each batch about 120 ... dryer and the dryer efficiency is 80%. Latent heat of steam at 4 kg/cm2 is 520 kcal/kg.
Last Answer : Given that Qty of material dried per batch - 120 Kgs Moisture at inlet - 60% a. The quantity of moisture removed per batch. Water quantity in a wet batch - 120 x 0.6 = 72 Kgs. Quantity of bone dry ... - 48/0.95 = 50.5 Kgs. Equivalent water in a dry batch - 50.5 - 48 = 2.5 Kgs.
Description : What is weak easily deformed layer in the mantle is called the?
Last Answer : Feel Free to Answer
Description : With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost (A) Increases (B) Decreases (C) Remains unchanged (D) Increases exponentially
Last Answer : (B) Decreases
Description : Pick up the correct statement from the following: (A) The substance which consists of one primary chemical, is known as monomer (B) The polymer consists of thousands of monomers joined together (C) The polymer molecule is called macro-molecule (D) All the above
Description : What is thermoplastic rubber? -Biology
Last Answer : answer:
Description : What is Thermoplastic ?
Last Answer : A thermoplastic (sometimes written as thermoplastic) is a type of plastic made from polymer resin that becomes a homogenous liquid when it hardens when frozen and cooled. When frozen , it ... , however, thermosetting plastics tend to be more durable when allowed to cool than many thermoplastics.
Description : Cross linked polymers are (A) Thermoplastic (B) Thermosetting (C) Either (A) or (B) (D) Fibres only
Description : The only natural thermoplastic resin, which is a product of animal life is (A) Rosin (B) Shellac (C) Amber (D) Copal
Last Answer : (B) Shellac
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 : Pick out the wrong statement. (A) Polymeric fibres are never produced by addition polymerisation (B) Property of tackiness is exhibited by uncured rubber (C) Sharp melting point is not observed in thermoplastic polymers (D) Polythene generally has an excellent resistance to ultra violet rays
Last Answer : (A) Polymeric fibres are never produced by addition polymerisation
Description : Linear polymers are normally (A) Thermosetting (B) Thermoplastic (C) Elastometric (D) Having extremely high softening poin
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
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 : Thermoplastic resins usually (A) Remain hard as long as they are hot (B) Cannot be reclaimed from waste (C) Permanent setting resins (D) Less brittle than thermosetting resins
Last Answer : (D) Less brittle than thermosetting resins