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- Question
Pick out the wrong statement.
Options- A. Biological oxygen demand (B.O.D.) value of a sewerage sample is always lower than its chemical oxygen demand (C.O.D.) value.
- B. Environmental pollution by NOx emission is much higher by four stroke petrol engines as compared to the two stroke engines.
- C. Temperature in stratosphere rises with increasing altitude.
- D. The characteristic of a green house body is that it allows the long wavelength incoming solar radiation to come in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere.
- Correct Answer
- The characteristic of a green house body is that it allows the long wavelength incoming solar radiation to come in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere.
- 1. The equivalent diameter for pressure drop is __________ that for heat transfer.
Options- A. smaller than
- B. greater than
- C. equal to
- D. not related with Discuss
- 2. Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
Options- A. organic peroxides
- B. sulphuric acid
- C. hydroflouric acid
- D. none of these Discuss
- 3. LPG stands for
Options- A. liquid petroleum gas
- B. liquified petrol gas
- C. liquid petrol gas
- D. liquefied petroleum gas Discuss
- 4. With increase in temperature, the surface tension of water
Options- A. increases
- B. decreases
- C. remains constant
- D. increases linearly Discuss
- 5. Fireclay bricks is not used for lining the
Options- A. cupola.
- B. gas producer.
- C. bottom of hot metal mixer.
- D. roof of open hearth furnace. Discuss
- 6. Phenol formaldehyde is produced by condensation polymerisation. It is also known as
Options- A. teflon
- B. bakelite
- C. polyester
- D. nylon-66 Discuss
- 7. The most convenient way of expressing solution concentration is in terms of
Options- A. mole fraction
- B. normality
- C. molality
- D. molarity Discuss
- 8. Urea is a __________ fertiliser.
Options- A. nitrogenous
- B. potassic
- C. phosphatic
- D. none of these Discuss
- 9. A fast breeder reactor
Options- A. uses natural uranium as fuel.
- B. does not require a moderator.
- C. both (a) and (b).
- D. neither (a) nor (b). Discuss
- 10. Carbon refractories have very high
Options- A. wetting characteristics
- B. refractoriness
- C. thermal conductivity
- D. both (b) and (c) Discuss
More questions
Correct Answer: smaller than
Correct Answer: organic peroxides
Correct Answer: liquefied petroleum gas
Correct Answer: decreases
Correct Answer: bottom of hot metal mixer.
Correct Answer: bakelite
Correct Answer: molarity
Correct Answer: nitrogenous
Correct Answer: does not require a moderator.
Correct Answer: both (b) and (c)
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