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MCQs

Total Questions : 1935 | Page 191 of 194 pages
Question 1901. The capacity of induced draft fan compared to forced draft fan in a boiler is__________________?
  1.    same
  2.    more
  3.    less
  4.    less or more depending on size of boiler
  5.    unpredictable
 Discuss Question
Answer: Option B. -> more
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1902. Gardually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of__________________?
  1.    higher effectiveness of boiler
  2.    high calorific value coal being burnt
  3.    fouling of heat transfer surfaces
  4.    raising of steam temperature
  5.    leakage of air
 Discuss Question
Answer: Option C. -> fouling of heat transfer surfaces
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1903. The three “Ts” for good combustion are____________________?
  1.    temperature, time, and turbulance
  2.    total air, true fuel, and turbulance
  3.    thorough mixing, total air, and temperature
  4.    total air, time, and temperature
  5.    none of the above
 Discuss Question
Answer: Option A. -> temperature, time, and turbulance
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1904. The safety valve on boiler drum compared to safety valve on super heater is set at ________________?
  1.    same value
  2.    higher value
  3.    lower value
  4.    lower/higher depending on steam flow
  5.    unpredicatble
 Discuss Question
Answer: Option B. -> higher value
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1905. The proximate analysis of fuel lists__________________?
  1.    various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as per-cents by volume
  2.    various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight
  3.    fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash
  4.    fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash
  5.    moisture and ash free heating value
 Discuss Question
Answer: Option D. -> fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1906. Green coal, in order to be burnt, must be____________________?
  1.    heated sufficiently
  2.    burnt in excess air
  3.    heated to its ignition point
  4.    burnt as powder
  5.    burnt as lumps
 Discuss Question
Answer: Option C. -> heated to its ignition point
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1907. Sulphur in coal results in___________________?
  1.    causing clinkering and slagging
  2.    corroding air heaters
  3.    spontaneous combustion during coal storage
  4.    facilitating ash precipitation
  5.    all of the above
 Discuss Question
Answer: Option E. -> all of the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1908. Pour point of fuel oil is the____________________?
  1.    lowest temperature at which oil will flow under set condition
  2.    storage temperature
  3.    temperature at which fuel is pumped through burners
  4.    temperature at which oil is transported
  5.    none of the above
 Discuss Question
Answer: Option A. -> lowest temperature at which oil will flow under set condition
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1909. The behaviour of coal in a furnace is determained by_______________________?
  1.    the content of sulphur
  2.    the content of ash and heating value
  3.    the proximate analysis
  4.    the exact analysis
  5.    its type
 Discuss Question
Answer: Option C. -> the proximate analysis
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1910. Gusset stays in a boiler are provided to____________________?
  1.    prevent the bulging of flat surfaces
  2.    avoid explosion in furnace
  3.    prevent leakage of hot flue gases
  4.    support furnace freely from top
  5.    prevent atmospheric air leaking into furnace
 Discuss Question
Answer: Option A. -> prevent the bulging of flat surfaces
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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