Polymerisation is a chemical process in which molecules of a compound become________________?

Related Mcqs:

1. Supercharging is the process of_____________________?

   A. supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere
   B. providing forced cooling air
   C. injecting excess fuel for raising more load
   D. supplying compressed air to remove combustion products fully
   E. raising exhaust pressure

2. The maximum temperature in the I.C. engine cylinder is of the order of ________________?

   A. 500- 1000°C
   B. 1000- 1500°C
   C. 1500-2000°C
   D. 2000-2500°C
   E. 2500-3000°C

3. In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of____________________?

   A. 250°C
   B. 500°C
   C. 1000°C
   D. 150CPC
   E. 2000°C

4. The following volume of air is required for consuming 1 liter of fuel by a four stroke engine_______________?

   A. 1 m3
   B. 5 m3
   C. 5-6 m3
   D. 9-10 m3
   E. 15-18 m3

5. Pick up the wrong statement?

   A. 2-stroke engine can run in any direction
   B. In 4-stroke engine, a power stroke is obtained in 4-strokes
   C. thermal efficiency of 4-stroke engine is more due to positive scavenging
   D. petrol engines work on otto cycle
   E. petrol engines occupy more space than diesel engines for same power output

6. Gaseous-fuel guarantees are based on___________________?

   A. calorific value of oil
   B. low heat value of oil
   C. high heat value of oil
   D. mean heat value of oil
   E. all of the above

7. Which of the following is the lightest and most volatile liquid fuel________________?

   A. diesel
   B. kerosene
   C. fuel oil
   D. gasoline
   E. lub oil

8. Detonation is caused by the following unstable compounds______________________?

   A. peroxides, aldehydes and ketones
   B. peroxides, aldehydes, oxides and sul-phides
   C. aldehydes, oxides and ketones
   D. ketones and sulphur compounds
   E. none of the above

9. The thermal efficiency of a diesel engine is of the order of_________________?

   A. 92%
   B. 68%
   C. 52%
   D. 34%
   E. 25%.

10. The theoretically correct mixture of air and petrol is approximately ________________?

    A. 0.334027778
    B. 0.500694444
    C. 0.625694444
    D. 0.834027778