__________ is normally used for the manufacture of refrigerator components and transistor parts. (A) Polypropylene (B) Polystyrene (C) Polyester (D) Polyurethane

__________ is normally used for the manufacture of refrigerator
components and transistor parts.
(A) Polypropylene
(B) Polystyrene
(C) Polyester
(D) Polyurethane
by

1 Answer

Answer :

(B) Polystyrene
by

Related questions

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Last Answer : (A) Polystyrene

Contact lenses for eyes are made of Perspex, which is nothing but (A) poly-methyl-methacrylate (B) Polystyrene (C) Unsaturated polyester (D) Polypropylene

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Thermocol is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten (A) Saturated polyester (B) Polyurethane (C) Polystyrene (D) Either (B) or (C)

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Last Answer : (D) Either (B) or (C)

Glyptal used in the manufacture of paints & lacquers is a __________ polymer. (A) Polyamide (B) Polystyrene (C) Polyester (D) Polyacrylonitril

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Benzoyl chloride is not used as a catalyst in the manufacture of (A) Polystyrene (B) Polyvinyl acetate (C) Polypropylene (D) Polyvinyl chloride-co-vinyl acetate

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Which of the following is not a polyolefin? (A) Polystyrene (B) Polypropylene (C) Neoprene (D) None of these

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Nylon is made up of : (1) Polyamide (2) Polyester (3) Polyethylene (4) Polypropylene

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Last Answer : (B) Nylon-66

The main use of butadiene is (A) As a plasticiser for unsaturated polyester (B) In the manufacture of synthetic rubber (C) As an anti-skimming agent in paint (D) None of these

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Insulation of liquid surface can be achieved by __________ on top of its surface. (A) Floating hollow polypropylene spheres (B) Spraying alumina powder (C) Putting cement (D) None of these

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__________ is produced by polymerisation of chloroprene. (A) Thiokol (a polysulphide rubber) (B) Butyl rubber (C) Neoprene (D) Polyurethane rubber

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Pick out the wrong statement. (A) A refrigeration cycle violates the second law of thermodynamics (B) Refrigeration cycle is normally represented by a temperature vs. entropy plot (C) In a refrigerator, work required decreases as the temperature of the refrigerator and the temperature at which heat is rejected increases (D) One ton of refrigeration is equivalent to the rate of heat absorption equal to 3.53 kW

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

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Polystyrene is a __________ plastic at room temperature. (A) Ductile (B) Brittle (C) Malleable (D) None of these

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Rayon is a __________ fibre. (A) Cellulosic (B) Polyamide (C) Polyester (D) Natural

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Normally, the FIRST step in troubleshooting a transistor circuit card is to _____________. A. carefully remove the transistors from the card B. give the circuit an initial test with a signal generator C. test for continuity with a low voltage DC supply D. visually inspect the card

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List three items of information normally included in the general description section of a specification sheet for a transistor.

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In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is (A) Terylene (B) Polybutadiene (C) PVC (D) Polypropylene

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Polypropylene is preferred to polythene, because the former is (A) Non-inflammable (B) Harder (C) Stronger (D) Both (B) & (C)

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Liners of bags are usually made of (A) Polythene (B) PVC (C) Polypropylene (D) Polyesters

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