Power alcohol as compared to straight run gasoline has lower ________________?

Related Mcqs:

1. Combustion of pulverised coal as compared to that of lump coal ________________?

   A. Develops a non-luminous flame
   B. Develops a low temperature flame
   C. Can be done with less excess air
   D. Provides a lower rate of heat release

2. Flue gas discharge velocity through chimney of a big thermal power plant may be around ________________ m/sec?

   A. 0.5
   B. 10
   C. 50
   D. 500

3. Actual flame temperature is always lower than the adiabatic flame temperature, because there is________________?

   A. No possibility of obtaining complete combustion at high temperature
   B. Always loss of heat from the flame
   C. Both A. and B.
   D. Neither A. nor B.

4. Highly reactive coke have lower ___________________?

   A. Porosity
   B. Coke reactivity index (CRI)
   C. Critical air blast (CAB) value
   D. Both B. and C.

5. A coal gasifier operating at 20 atm. (e.g. Lurgi gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having _____________________?

   A. Higher methane content and thus higher calorific value
   B. Higher carbon monoxide content
   C. Lower carbon dioxide content
   D. None of these

6. Coal tar fuels (CTF) as compared to petroleum based fuel oils have higher __________________?

   A. Calorific value
   B. Higher C/H ratio
   C. Sulphur content
   D. Difference in gross & net calorific value

7. Narrow coke ovens as compared to wider coke ovens_________________?

   A. Produce smaller coke
   B. Produce stronger coke
   C. Require less time of carbonisation
   D. All A., B. and C.

8. Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300°) may be reduced by about ______________ percent as compared to the use of atmospheric combustion air?

   A. 5
   B. 10
   C. 20
   D. 35

9. In low temperature carbonisation of coal as compared to high temperature carbonisation _____________ produced is less?

   A. Difference in gross & net calorific value of the coke oven gas
   B. Free carbon content in tar
   C. Yield percentage of coke
   D. Yield of ammonia present in coke oven gas

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.