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Biotechnology MCQ Quiz Hub
Biotechnology MCQ set-5
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1. RPVC can be made softer and more flexible using:
Reducers
Conditioners
Oils
Plasticizers
2. What is the Limiting Oxygen Index (LOI) of PVC?
45 or more
20 or more
45 or less
20 or less
3. Flexible PVC is used for:
Pipes
Partition walls
Flooring
Door frames
4. Which of the following PVC product is not there in the market?
PVC brick decor
PVC door
PVC cement
PVC plaster
5. PVC plug is used to:
Connect pipes of varying diameter
Connect 2 pipe lines
Seal pipes of less diameter
Seal end of pipe line
6. How is PVC recycled commonly?
Feedstock process
VinyLoop process
Mechanical process
Chemical process
7. Which additive in PVC pipe leads to the contamination of potable water?
Lead
VCM
Phthalates
Sulphur
8. Pure PVC is ____________ in colour.
Grey
Blue
White
Black
9. Natural rubber contains polymers of an organic compound:
Polyprene
Neoprene
Thiokol
Isoprene
10. What is added to rubber to make it a thermosetting polymer?
Potassium
Sulphur
Sodium
Phosphorous
11. Rubber latex is used for:
Bonding wood plys
Bonding rubber to walls
Bonding rubber to wood
Bonding tools
12. Rubber seed oil can be used in:
Paint
Medicine
Varnish
Fuel
13. Recycled crumb rubber can be used in:
Plastering
Mortar
Paints
Concrete
14. What is resilience?
Strength
Elasticity
Soundness
Durability
15. Rubber bricks are generally used for:
Roofing
Walls
Floorings
Lining pizza ovens
16. Hardness of rubber is measured on which scale?
Rockwell scale
Shore scale
Mohr’s scale
Vicker’s scale
17. Synthetic rubber is also called:
Gum rubber
Caoutchouc
Buna-S
Gum elastic
18. Glass is a mixture of:
Non-metallic silicates
Metallic silicates
Metallic acetates
Non-metallic acetates
19. How many different categories of glass are there?
5
4
2
3
20. Which of the following types of glass accounts for about 90% of manufactured glass?
Potash-lime glass
Soda-lime glass
Potash-lead glass
Soda-lead glass
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