Temperature of coke oven gas just before entering into saturator (for recovery of NH3) is about ______________ °C?

Related Mcqs:

1. Which of the following fertilisers is produced in the by-products recovery (from coke oven gas) plant attached to an integrated steel plant ?

   A. Ammonium sulphate
   B. Ammonium nitrate
   C. Ammonium phosphate
   D. None of these

2. Which adsorbent is used for removing sulphur compounds (S Q, H2S, RSH etc.) removal from coke oven gas in by-products recovery plant ?

   A. Silica gel
   B. Diatomaceous earth
   C. Basalt
   D. Bog iron (i.e., moist ferric hydroxide)

3. Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has_________________?

   A. Higher calorific value
   B. Lower hydrogen content
   C. Both A. and B.
   D. Neither A. nor B.

4. Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around ______________ Nm3?

   A. 30
   B. 300
   C. 3,000
   D. 30,000

5. With increase in the time of carbonisation at a particular temperature (say 1000°C), the ______________ percentage in coke oven gas increases?

   A. Hydrogen
   B. Methane
   C. Unsaturated hydrocarbons
   D. All A., B. and C.

6. Yield of coke oven gas in low temperature carbonisation of coal is about ______________ Nm3 /ton of dry coal?

   A. 60
   B. 160
   C. 500
   D. 750

7. Fuel gases containing hydrocarbons (e.g. coke oven gas) are not preheated before burning, mainly because __________________?

   A. The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot
   B. It reduces its calorific value tremendously
   C. It reduces its flame temperature tremendously
   D. There are chances of explosion during preheating

8. Width of the coke oven towards coke side is slightly more than that on pusher side to____________________?

   A. Facilitate easy discharging of coke as it swells during carbonisation
   B. Facilitate uniform heating of the oven
   C. Increase the output of the coke
   D. None of these

9. Blast furnace gas compared to coke oven gas has_________________?

   A. Lower ignition temperature
   B. Narrower limit of inflammability
   C. Higher calorific value
   D. Lower theoretical flame temperature

10. Coke oven gas compared to blast furnace gas is________________?

    A. More explosive and inflammable
    B. Less poisonous
    C. Lighter
    D. All A., B. and C.