Question 31 : Which of the following are drumless once-through steam generators?
1. Subcritical steam generator
2. Supercritical steam generators
3. Utility steam generators
4. Marine steam generators
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Question 32 : The natural draught is produced by
1. chimney
2. centrifugal fan
3. steam jet
4. none of the mentioned
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Question 33 : The performance of a boiler is measured by the
1. dry flue gases
2. steam formation
3. moisture in fuel
4. unburnt carbon
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Question 34 : Which of these is an externally fired boiler?
1. Package boiler
2. Scotch-marine boiler
3. Lancashire boiler
4. None of the mentioned
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Question 35 : Locomotive boiler is a
1. single tube, vertical, externally fired & stationary boiler
2. single tube, horizontal, internally fired& stationary boiler
3. multitubular, horizontal, externally fired & stationary boiler
4. multitubular, horizontal, internally fired & mobile boiler
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Question 36 : The supercritical steam generators operate at a pressure range of?
1. 200-240 bar
2. 200-220 bar
3. 220- 240 bar
4. >240 bar
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Question 37 : What is the pressure range between which a marine steam generator works?
1. 100-200 bar
2. 60-65 bar
3. 80-100 bar
4. 70-85 bar
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Question 38 : Which of the following gaseous fuels has the lowest calorific value?
1. Refinery Gas
2. Gobar Gas
3. Converter Gas
4. Blast Furnace Gas
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Question 39 : Lancashire boiler is?
1. stationary fire tube boiler
2. horizontal boiler
3. internally fired boiler
4. all of the mentioned
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Question 40 : What is the disadvantage of natural draught?
1. it has less life
2. it has more maintenance cost of cleaning and more capital cost to build the chimney
3. the available draught decreases with increasing outside air temperature
4. all of the mentioned
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