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- Question
Cross linked polymers formed from bi-and trifuctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer __________ properties.
Options- A. thermoplastic
- B. thermosetting
- C. elastometric
- D. brittleness
- Correct Answer
- elastometric
- 1. In condensation polymerisation as compared to addition polymerisation
Options- A. the monomers are unsaturated compounds.
- B. no co-product is lost.
- C. the monomers contain two functional groups.
- D. generally only one monomer is involved Discuss
- 2. The generic chemical name for the class of polymers which are commerically known as nylons is
Options- A. polyolefins
- B. polyamide
- C. polyacrylate
- D. polyurathane Discuss
- 3. Synthetic rubber
Options- A. deforms, if stretched to double of its original dimension.
- B. is brittle at low temperature
- C. is softer at higher temperature.
- D. is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases. Discuss
- 4. Dielectric strength of a material is
Options- A. its energy stroage capacity.
- B. a magnetic property.
- C. its capacity to resist the flow of current.
- D. its capacity to withstand high voltage. Discuss
- 5. In a closed loop system, the process to be controlled is an integrating process with transfer function l/2s. The controller proposed to be used in an integral controller with transfer function 1/T1s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit
Options- A. overdamped response.
- B. underdamped response.
- C. undamped response.
- D. unstable response. Discuss
- 6. Size range of polymer molecules varies from __________ metre.
Options- A. 10-2 to 10-5
- B. 10-4 to 10-7
- C. 10-1 to 10-2
- D. 10-8 to 10-10 Discuss
- 7. All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it can not be used for the production of plastic
Options- A. filaments
- B. pipes
- C. buckets
- D. tubings Discuss
- 8. Flash point of motor gasoline may be around __________ °C.
Options- A. 10
- B. 45
- C. 100
- D. 150 Discuss
- 9. Solid particles of different densities are separated by
Options- A. filters
- B. thickness
- C. cyclones
- D. sorting classifier Discuss
- 10. Isotopes of an element have different
Options- A. mass number
- B. electronic configuration
- C. nuclear charge
- D. chemical properties Discuss
More questions
Correct Answer: the monomers contain two functional groups.
Correct Answer: polyamide
Correct Answer: is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases.
Correct Answer: its capacity to withstand high voltage.
Correct Answer: underdamped response.
Correct Answer: 10-2 to 10-5
Correct Answer: buckets
Correct Answer: 45
Correct Answer: sorting classifier
Correct Answer: mass number
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