Maharashtra Board Class 8 Man Made Materials MCQ

What type of plastic is used for making electric switches, radio cabinets, and covers over the handles of cookers?

1. A) Polyvinyl chloride (PVC)
2. B) Polystyrene (PS)
3. C) Polyethylene (PE)
4. D) Bakelite

    Answer: D) Bakelite

 

 

Which plastic category includes items like milk bags, packing bags, flexible garden pipes, etc.?

1. A) Polyvinyl chloride (PVC)
2. B) Polyethylene (PE)
3. C) Polypropylene (PP)
4. D) Polystyrene (PS)

    Answer: B) Polyethylene (PE)

 

What is the distinguishing feature of thermosetting plastics?

1. A) They can be molded as per our wish.
2. B) Once molded, their shape cannot be changed on heating.
3. C) They are transparent.
4. D) They decompose easily.

    Answer: B) Once molded, their shape cannot be changed on heating.

 

Why is glass used as an insulator in electric appliances?

1. A) It is a good conductor of electricity.
2. B) It is transparent.
3. C) It is a bad conductor of electricity.
4. D) It is lightweight.

    Answer: C) It is a bad conductor of electricity.

 

What is the adverse health effect associated with prolonged contact with thermocol containing styrene?

1. A) Respiratory issues
2. B) Enhanced vision
3. C) Improved digestion
4. D) Stronger immune system

    Answer: A) Respiratory issues

 

Which type of glass is used in the production of light bulbs and tubes due to its clarity and transparency?

1. A) Silica glass
2. B) Lead glass
3. C) Optical glass
4. D) Borosilicate glass

    Answer: B) Lead glass

 

What is the characteristic property of thermocol that makes it suitable for packing delicate items?

1. A) High density
2. B) Low melting point
3. C) Good conductor of heat
4. D) Shock-absorbing

    Answer: D) Shock-absorbing

 

Which plastic type is commonly used in making raincoats, pipes, handbags, shoes, and electric cable insulation?

1. A) Polyvinyl chloride (PVC)
2. B) Polypropylene (PP)
3. C) Polystyrene (PS)
4. D) Polyethylene (PE)

    Answer: A) Polyvinyl chloride (PVC)