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- Question
Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2. Which of the following polymers has the maximum film elongation (of the order of 100%)?
Options- A. Water impermeable cellophane
- B. Polythene
- C. Cellulose acetate
- D. Teflon
- Correct Answer
- Polythene
- 1. Tolerable limit of nitrogen oxides in air is __________ ppm.
Options- A. 0.1
- B. 1
- C. 5
- D. 25 Discuss
- 2. Which of the following elements is not included in the scope of market analysis?
Options- A. Competition from other manufactures.
- B. Product distribution.
- C. Opportunities
- D. Economics Discuss
- 3. In a cylinderical vessel subjected to internal pressure, the longitudinal stress ?L and the circumferential stress, ?n are related by
Options- A. ?h = 2 ?L
- B. ?h = ?L
- C. ?h = ?L/2
- D. no relation exists Discuss
- 4. Balls for ball mills are never made of
Options- A. forged/cast steel
- B. lead
- C. cast iron
- D. alloy steel Discuss
- 5. Molecular weight of crude petroleum may be around
Options- A. 50
- B. 250
- C. 1500
- D. 5000 Discuss
- 6. Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the
Options- A. presence of an inert atmosphere.
- B. presence of a reducing atmosphere.
- C. absence of air.
- D. presence of an oxidising atmosphere. Discuss
- 7. Temperature and pressure in ammonia converter is
Options- A. 200 atm, 1000°C
- B. 450 atm, 200°C
- C. 450 atm, 550°C
- D. 450 atm, 1000°C Discuss
- 8. Black liquor generated during paper manufacture is concentrated in a
Options- A. single effect evaporator.
- B. single effect evaporator followed by a crystalliser.
- C. multiple effect evaporator.
- D. multiple effect evaporators followed by a crystalliser. Discuss
- 9. 'Lang factor' is defined as the ratio of the capital investment to the delivered cost of major equipments. The value of 'Lang factor' for fixed capital investment, for a solid-fluid processing chemical plant ranges from
Options- A. 1.2 to 1.4
- B. 2.5 to 2.7
- C. 4.2 to 4.4
- D. 6.2 to 6.4 Discuss
- 10. Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always
Options- A. less than arithmetic mean value.
- B. more than arithmetic mean value.
- C. more than geometric mean value.
- D. both(b) & (c). Discuss
More questions
Correct Answer: 5
Correct Answer: Economics
Correct Answer: ?h = 2 ?L
Correct Answer: lead
Correct Answer: 1500
Correct Answer: absence of air.
Correct Answer: 450 atm, 550°C
Correct Answer: multiple effect evaporator.
Correct Answer: 4.2 to 4.4
Correct Answer: less than arithmetic mean value.
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