A. carbonisation of coal
B. passing steam over incandescent coke
C. passing air and a large amount of steam over waste coal at about 65°C
D. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
E. same way as the natural gas

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Related Mcqs:

  1. Water gas is produced by ___________________ ?
    A. carbonisation of coal B. passing steam over incandescent coke C. passing air and a large amount of steam over waste coal at about 65°C D. partial combustion of caol, eke, anthractie coal or charcoal in a mixed air steam blast E. same way as the natural gas...
  2. The pressure ratio for an open cycle gas turbine compared to closed cycle gas turbine of same h.p. is_______________?
    A. low B. high C. same D. low/high depending on make and type E. unpredictable...
  3. Maximum temprature in a gas turbine is of the order of COMPRESSORS, GAS TURBINES AND JET ENGINES______________________?
    A. 2500°C B. 2000°C C. 1500°C D. 1000°C E. 700°C...
  4. The thrust on the rotor in a centrifugal compressor is produced by________________?
    A. radial component B. axial component C. tangential component D. resultant component...
  5. The ratio of specific weighf/h.p. of gas turbin and I.C engines may be typically of the order of_______________________?
    A. 1 : 1 B. 2 : 1 C. 4 : 1 D. 1:2 E. 1 : 6...
  6. There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would__________________?
    A. remain same B. decrease C. increase D. unpredictable E. none of the above...
  7. As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio_____________________?
    A. increases B. decreases C. remains same D. first increases and then decreases E. first decreases and then increases...
  8. In gas turbines^ high thermal efficiency is obtained in_________________?
    A. closed cycle B. open cycle C. both of the above D. closed/open depending on other con-siderations E. unpredictable...
  9. Work ratio of a gas turbine may be improved by f____________________?
    A. decreasing the compression work B. increasing the compression work C. increasing the turbine work D. decreasing the turbine work E. A. and C. above...
  10. Reheating in multistage expansion gas turbine results in____________________?
    A. high thermal efficiency B. reduction in compressor work C. decrease of heat loss in exhaust D. maximum work output E. none of the above...
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