Discussion
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- Question
Buna-S is also known as
Options- A. teflon
- B. PTFE
- C. SBR
- D. polycrylates
- Correct Answer
- SBR
- 1. Which of the following is a copolymer?
Options- A. PVC
- B. Bakelite
- C. Polythene
- D. Teflon Discuss
- 2. Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent.
Options- A. 1-1000
- B. 1000-1500
- C. 1500-2000
- D. 2000-2500 Discuss
- 3. The synthetic fibres produced from __________ are known as rayon.
Options- A. lignin
- B. cellulose
- C. polyamides
- D. ethylene glycol Discuss
- 4. Buna-S is a __________ material.
Options- A. fibrous
- B. plastic
- C. resinous
- D. rubbery Discuss
- 5. Density of high density polythene is about __________ gm/c.c.
Options- A. 1.18
- B. 1.05
- C. 0.95
- D. 0.99 Discuss
- 6. If the discharge of a centrifugal pump is throttled, then its suction lift
Options- A. increases
- B. decreases
- C. remains unchanged
- D. data insufficient to predict Discuss
- 7. Most commonly used joint in the underground pipe lines is the
Options- A. sleevejoint
- B. coupling
- C. flange
- D. expansion joint Discuss
- 8. Co-efficient of velocity is __________ the coefficient of discharge.
Options- A. less than
- B. more than
- C. equal to
- D. not related to Discuss
- 9. Hydraulic mean depth (Dm) for a circular pipe of diameter 'D' flowing full is 0.25 D. For a circular channel, at Dm = 0.3 D, gives the condition for the maximum
Options- A. flow rate
- B. mean velocity
- C. both 'a' & 'b'
- D. neither 'a' nor 'b' Discuss
- 10. The drag co-efficient for a bacterium moving in water at 1 mm/s, will be of the following order of magnitude (assume size of the bacterium to be 1 micron and kinematic viscosity of water to be 10-6m2/s).
Options- A. 24000
- B. 24
- C. 0.24
- D. 0.44 Discuss
Polymer Technology problems
Search Results
Correct Answer: Bakelite
Correct Answer: 1-1000
Correct Answer: cellulose
Correct Answer: rubbery
Correct Answer: 0.95
Correct Answer: increases
Correct Answer: sleevejoint
Correct Answer: more than
Correct Answer: mean velocity
Correct Answer: 0.44
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