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MCQs

Total Questions : 1113 | Page 12 of 112 pages
Question 111. Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its
  1.    Elasticity
  2.    Strength
  3.    Plasticity
  4.    Weathering characteristics
 Discuss Question
Answer: Option D. -> Weathering characteristics
Question 112. Valcunisation of rubber decreases its
  1.    Tensile strength
  2.    Resistance to organic solvents
  3.    Tackiness
  4.    Working temperature range
 Discuss Question
Answer: Option C. -> Tackiness
Question 113. Silicone is a/an
  1.    Monomer
  2.    Inorganic polymer
  3.    Thermoplastic material
  4.    A natural polymer
 Discuss Question
Answer: Option B. -> Inorganic polymer
Question 114. Alkyd resin can not be used for making
  1.    Plasticiser
  2.    Paint & varnish
  3.    Fibres
  4.    Film forming materials
 Discuss Question
Answer: Option C. -> Fibres
Question 115. Which of the following polymers is used for making a non stick coating on frying pans?
  1.    Bakelite
  2.    Teflon
  3.    Perspex
  4.    PVC
 Discuss Question
Answer: Option B. -> Teflon
Question 116. Synthetic rubber
  1.    Deforms, if stretched to double of its original dimension
  2.    Is brittle at low temperature
  3.    Is softer at higher temperature
  4.    Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases
 Discuss Question
Answer: Option D. -> Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases
Question 117. Teflon is
  1.    Phenol formaldehyde
  2.    An inorganic polymer
  3.    Polytetra florouethylene (PTFE)
  4.    A monomer
 Discuss Question
Answer: Option C. -> Polytetra florouethylene (PTFE)
Question 118. Which of the following is generally not used as eord for synthetic rubber tyre casing?
  1.    Dacron
  2.    Nylon
  3.    Cellulose
  4.    None of these
 Discuss Question
Answer: Option C. -> Cellulose
Question 119. Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces
  1.    Epoxy resin
  2.    Polyamide
  3.    Alkyd resin
  4.    Phenolic resin
 Discuss Question
Answer: Option C. -> Alkyd resin
Question 120. Terylene is
  1.    Same as dacron
  2.    A polyester
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B

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