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More Questions on This Topic :

Question 1. Thermal efficiency of well maintained boiler will be of the order
  1.    40 %
  2.    50 %
  3.    75 %
  4.    90 %
Answer: Option D

Question 2. The amount of water evaporated in kg per kg of fuel burnt is called
  1.    Evaporative capacity of a boiler
  2.    Equivalent evaporation from and at 100° C
  3.    Boiler efficiency
  4.    None of these
Answer: Option A

Question 3. Pick up the correct statement as regards Cornish boiler and Lancashire boiler
  1.    Cornish is fire tube and Lancashire is water tube
  2.    Cornish is water tube and Lancashire is fire tube
  3.    Cornish has two fire tubes and Lancashire has one
  4.    Lancashire has two fire tubes and Cornish has one
Answer: Option D

Question 4. Coke is produced by
  1.    Pulverizing coal in inert atmosphere
  2.    Heating wood in a limited supply of air at temperatures below 300°C
  3.    Strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
  4.    Enriching carbon in the coal
Answer: Option C

Question 5. Stoichiometric quantity of air is the
  1.    Air present in atmosphere at NTP conditions
  2.    Air required for complete combustion of fuel with no excess air
  3.    Air required for optimum combustion so as to have reasonable excess air
  4.    Air required to convert CO into CO₂
Answer: Option B

Question 6. Which is not correct statement about pulverized fuel firing?
  1.    High burning rate is possible
  2.    Heat release can be easily controlled
  3.    Fuel burns economically
  4.    It is the best technique for burning high ash content fuel having low fusion ash
Answer: Option D