R4RIN – MCQs, Mock Tests | Biotechnology Biotechnology MCQ set-5

RPVC can be made softer and more flexible using:

1. Reducers
2. Conditioners
3. Oils
4. Plasticizers

✅ Correct Answer: 4

What is the Limiting Oxygen Index (LOI) of PVC?

1. 45 or more
2. 20 or more
3. 45 or less
4. 20 or less

✅ Correct Answer: 1

Flexible PVC is used for:

1. Pipes
2. Partition walls
3. Flooring
4. Door frames

✅ Correct Answer: 3

Which of the following PVC product is not there in the market?

1. PVC brick decor
2. PVC door
3. PVC cement
4. PVC plaster

✅ Correct Answer: 4

PVC plug is used to:

1. Connect pipes of varying diameter
2. Connect 2 pipe lines
3. Seal pipes of less diameter
4. Seal end of pipe line

✅ Correct Answer: 4

How is PVC recycled commonly?

1. Feedstock process
2. VinyLoop process
3. Mechanical process
4. Chemical process

✅ Correct Answer: 2

Which additive in PVC pipe leads to the contamination of potable water?

1. Lead
2. VCM
3. Phthalates
4. Sulphur

✅ Correct Answer: 1

Pure PVC is ____________ in colour.

1. Grey
2. Blue
3. White
4. Black

✅ Correct Answer: 3

Natural rubber contains polymers of an organic compound:

1. Polyprene
2. Neoprene
3. Thiokol
4. Isoprene

✅ Correct Answer: 4

What is added to rubber to make it a thermosetting polymer?

1. Potassium
2. Sulphur
3. Sodium
4. Phosphorous

✅ Correct Answer: 2

Rubber latex is used for:

1. Bonding wood plys
2. Bonding rubber to walls
3. Bonding rubber to wood
4. Bonding tools

✅ Correct Answer: 3

Rubber seed oil can be used in:

1. Paint
2. Medicine
3. Varnish
4. Fuel

✅ Correct Answer: 1

Recycled crumb rubber can be used in:

1. Plastering
2. Mortar
3. Paints
4. Concrete

✅ Correct Answer: 4

What is resilience?

1. Strength
2. Elasticity
3. Soundness
4. Durability

✅ Correct Answer: 2

Rubber bricks are generally used for:

1. Roofing
2. Walls
3. Floorings
4. Lining pizza ovens

✅ Correct Answer: 3

Hardness of rubber is measured on which scale?

1. Rockwell scale
2. Shore scale
3. Mohr’s scale
4. Vicker’s scale

✅ Correct Answer: 2

Synthetic rubber is also called:

1. Gum rubber
2. Caoutchouc
3. Buna-S
4. Gum elastic

✅ Correct Answer: 3

Glass is a mixture of:

1. Non-metallic silicates
2. Metallic silicates
3. Metallic acetates
4. Non-metallic acetates

✅ Correct Answer: 2

How many different categories of glass are there?

1. 5
2. 4
3. 2
4. 3

✅ Correct Answer: 4

Which of the following types of glass accounts for about 90% of manufactured glass?

1. Potash-lime glass
2. Soda-lime glass
3. Potash-lead glass
4. Soda-lead glass

✅ Correct Answer: 2