Chapter No. 5

83 Questions | Total Attempts: 466

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Chapter No. 5


Questions and Answers
  • 1. 
    1. Which of the following is the property of composite material?
                                                                                           
    • A. 

          A high strength 

    • B. 

      B high stiffness  

    • C. 

      C resistance to corrosion 

    • D. 

      D high red hardness

  • 2. 
    1.          Thermoplastic materials are those materials which__________________
    • A. 

      A are formed into shape under pressure and result in permanently hard product

    • B. 

      B do not become hard with the application of heat and pressure and no chemical change occurs

    • C. 

      C are flexible and can withstand considerable wear under suitable conditions

    • D. 

      D are used as a friction lining for clutches and brakes

  • 3. 
    3   Which of the following is not thermosetting plastic?                                                                                                            
    • A. 

      A nylons

    • B. 

      B epoxy  

    • C. 

      C melamine

    • D. 

       D Bakelite

  • 4. 
    4       The size of nano-particles ranges from   ____________
    • A. 

      A 0.1nm-100nm 

    • B. 

         B 10nm-50nm       

    • C. 

            C 1nm-10nm   

    • D. 

      D 100nm-1000nm

  • 5. 
    5      Polymers have low density                                
    • A. 

      A true  

    • B. 

      B false

  • 6. 
    6     Which of the following is the thermoplastic material?                                                                                                    
    • A. 

      A acrylic       

    • B. 

      B epoxy   

    • C. 

      C melamine

    • D. 

      D Bakelite

  • 7. 
    7 Which of the following is the chemically inert to organic solvents?                
    • A. 

      A thermoplastic  plastic

    • B. 

      B thermosetting plastic

  • 8. 
    8       Which of the following is used in automobile tyres?
    • A. 

      A chloroprene    

    • B. 

            B SBR                    

    • C. 

      C NBR     

    • D. 

                  D silicones

  • 9. 
    1.       Which of the following are used in sanitary wares?
    • A. 

      A silicones

    • B. 

      B ceramics     

    • C. 

          C nylons  

    • D. 

      D polyester

  • 10. 
    10.       ________ is formed by mixing hydrochloric acid, limestone and natural gas.                                                                                   
    • A. 

      A Acrylics                    

    • B. 

      B ABS          

    • C. 

      C PVC  

    • D. 

      D Bakelite

  • 11. 
    11.       ________ can be reshaped after heating.       
    • A. 

      A thermosetting plastic  

    • B. 

      B thermoplastic plastic

  • 12. 
    1.       Which of the following is used in fluorescent light reflectors?                                                                                       
    • A. 

      A PVC 

    • B. 

      B polystyrene 

    • C. 

      C elastomers

    • D. 

          D nylons

  • 13. 
    13.          Thermosetting plastic are those materials which__________________
    • A. 

      A are formed into shape under pressure and result in permanently hard product

    • B. 

      B do not become hard with the application of heat and pressure and no chemical change occurs

    • C. 

      C are flexible and can withstand considerable wear under suitable conditions

    • D. 

      D are used as a friction lining for clutches and brakes

  • 14. 
    14.       Polyvinylchloride (PVC) is a _____ material                              
    • A. 

      A thermoplastic 

    • B. 

      B thermosetting

  • 15. 
    15.       _____ is a mixture of both paint and varnish.                                                                                             
    • A. 

      A cellulose      

    • B. 

        B enamel  

    • C. 

      C latex 

    • D. 

      D melamine

  • 16. 
    16.       Rubber is a linear polymer.                                 
    • A. 

      A true 

    • B. 

      B false

  • 17. 
    17.Which kinds of materials are used in civil structures?                                                                                                            
    • A. 

      A Piezoelectric material 

    • B. 

      B Magneto restrictive material 

    • C. 

      C Polymer gel       

    • D. 

      D Shape memory materials

  • 18. 
    18.       Which of the following is solid under the trade name ‘Perspex’?                                                                                                                                        
    • A. 

      A Polyamides             

    • B. 

      B Poly methyl methacrylate

    • C. 

      C PVC   

    • D. 

      D Melamine

  • 19. 
    19.       Which of the following is laminated composite?                                                          
    • A. 

      A alcad   

    • B. 

      B cement concrete 

    • C. 

      C reinforced concrete

    • D. 

        D hybrid composites

  • 20. 
    20.Melting point of nano material decreases with decrease in size of particle.                                               
    • A. 

      A true   

    • B. 

      B false

  • 21. 
    21.Which one of the following processes is used for making high power magnets                                   
    • A. 

      A powder metallurgy 

    • B. 

          B nano technology   

    • C. 

      C polymerization 

    • D. 

      D none of these

  • 22. 
    22. Nano materials are used for water purification in desalinization by reverse.
    • A. 

      A correct  

    • B. 

      B incorrect

  • 23. 
    23      Which of the following is not a reinforced composits?                                                                                                 
    • A. 

      A wood        

    • B. 

      B FRP   

    • C. 

      C hybrid composite

    • D. 

      D alcad

  • 24. 
    24. Which of the followings are used in wind screen of motors?                                                                                            
    • A. 

      A glass-wool 

    • B. 

      B silicones  

    • C. 

      C glasses

    • D. 

      D PVC

  • 25. 
    25      Which of the followings are used in contact lenses?                                                                                            
    • A. 

      A Polymethyl methacrylate (PMMA)  

    • B. 

          B epoxy resins

    • C. 

      C ABS       

    • D. 

      D nylons

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