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MCQs

Total Questions : 1935 | Page 192 of 194 pages
Question 1911. Sulphur content of fuels is very important to the plant operators because it____________________?
  1.    has high heating value
  2.    retards electric precipitation
  3.    promotes complete combustion
  4.    has highly corrosive effect
  5.    facilitates ash removal
 Discuss Question
Answer: Option D. -> has highly corrosive effect
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1912. An economiser in a boiler______________________?
  1.    increases steam pressure
  2.    increases steam flow
  3.    decreases fuel consumption
  4.    decreases steam pressure
  5.    increases life of boiler
 Discuss Question
Answer: Option C. -> decreases fuel consumption
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1913. In locomotives, the draught is produced by_________________?
  1.    chimney
  2.    induced draft fan
  3.    both combined A. and B.
  4.    steam jet draught
  5.    none of the above
 Discuss Question
Answer: Option D. -> steam jet draught
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1914. The maximum discharge through a chimney occurs when the height of chimney is_____________________?
  1.    infinitely long
  2.    around 200 meters
  3.    equal to the height of the hot gas column producing draught
  4.    outside temperature is very low
  5.    more than the tallest building nearby
 Discuss Question
Answer: Option C. -> equal to the height of the hot gas column producing draught
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1915. Vacuum for reciprocating steam engines compared to steam turbines is__________________?
  1.    more
  2.    equal
  3.    less
  4.    could be more or less depending on the size of plant
  5.    none of the above
 Discuss Question
Answer: Option C. -> less
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1916. Spontaneous combustion is a phenomenon in which____________________?
  1.    all the fuel burns instantaneously producing high energy release
  2.    fuel burns with less air
  3.    coal bursts into flame without any external ignition source but by itself due to gradual increase in temperature as a result of heat released by combi
  4.    explosion in furnace
  5.    none of the above
 Discuss Question
Answer: Option C. -> coal bursts into flame without any external ignition source but by itself due to gradual increase in temperature as a result of heat released by combi
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1917. Which device is used in thermal power plants to reduce level of pollution___________________?
  1.    induced draft fan
  2.    smoke meter
  3.    chimney
  4.    precipitator
  5.    pulveriser
 Discuss Question
Answer: Option D. -> precipitator
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1918. Ultimate analysis of fuel is determination of percentage of____________________?
  1.    carbon, hydrogen, nitrogen, sulphur, moisture
  2.    fixed carbon, ash, volatile matter, moisture
  3.    higher calorific value
  4.    lower calorific value
  5.    best analysis
 Discuss Question
Answer: Option A. -> carbon, hydrogen, nitrogen, sulphur, moisture
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1919. The height of chimney in a power plant is governed by__________________?
  1.    the draft to be created
  2.    limitation of construction facilities
  3.    control of pollution
  4.    quantity of flue gases to be handled
  5.    all of the above
 Discuss Question
Answer: Option C. -> control of pollution
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1920. The function of injector used in small capacity boilers is to____________________?
  1.    create vacuum
  2.    inject chemical solution in feed pump
  3.    pump water, similar to boiler feed pump
  4.    add make up water in the system
  5.    none of the above
 Discuss Question
Answer: Option C. -> pump water, similar to boiler feed pump
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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