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This set of Thermal Engineering 2 Multiple Choice Questions & Answers (MCQs) focuses on Thermal Engineering II Set 9
Q1 | What type of boiler is a Velox boiler?
- forced circulation boiler
- natural circulation boiler
- positively forced circulation boiler
- once- through boiler
Q2 | What is used to heat the feed water which is used for recirculation through tubes?
- condenser
- pre-heater
- economizer
- water clarifier
Q3 | How many circuits are there in the Schmidt-Hartmann boiler?
- 3
- 2
- 4
- 6
Q4 | Which type of circulation is incurred in Schmidt-Hartmann boiler?
- natural circulation
- positive forced circulation
- forced circulation
- once-through circulation
Q5 | Why are salts deposited on the evaporator drum?
- due to continuous circulation of water
- due to usage of hard water containing calcium content
- due to circulation of impure water
- due to the chemicals added in water
Q6 | What is feature of the Loffler boilers?
- evaporating water by super heated steam
- provide better efficiency by re-circulating gas coming out of turbine
- produce better steam quality by heating the boiler furnace above critical degrees
- eliminate the extra components used
Q7 | What is the major difficulty of the La-Mont boiler?
- unstable water circulation
- deposition of salts
- overheating of the components
- boiler working is slow
Q8 | Which is the most recent economical method of power generation from boilers?
- natural circulation boiler
- fire tube boiler
- forced circulation
- super critical boiler
Q9 | Which of the following boilers has the highest heat transfer capacity?
- subcritical boiler
- critical boiler
- forced circulation boiler
- supercritical boiler
Q10 | Why boiler draught is most essential part of the thermal plants?
- serves combustion by supplying ample amount of air
- helps in maintaining air ventilation
- required to maintain constant air flow
- stabilizes the boiler system
Q11 | Which is the correct formula of total draught loss?
- ht = hv + hb + hc + hcd
- ht = hv + hb – hc + hcd
- ht = hv – hb + hc + hcd
- ht = hv – hb – hc – hcd
Q12 | By what is natural draught produced?
- air duct
- chimney
- locomotive exhaust
- air blower
Q13 | Which of the following given below as the affect on amount natural draught?
- boiler operation
- size of the furnace
- grade of the fuel
- dust content in the fuel is used
Q14 | When is artificial draught preferred?
- when quick evacuation of flue gases is required
- when we choose large power plant systems
- when draught produced by chimney is not sufficient
- when there are many components inside the boiler
Q15 | Artificial draught is also called as _______
- force draught
- induced draught
- balanced draught
- mechanical draught
Q16 | What is installed to transfer air into furnace in forced draught system?
- air blower
- tuyeres
- draft gauges
- cyclone separator
Q17 | Where is blower installed in induced draught system?
- near the boiler
- base of the chimney
- above the boiler
- between economizer and air preheater
Q18 | How can exhaust gas be recovered in the induced draught?
- by installing the forced draught fan at the starting point
- by extending the chimney’s height
- by inletting high amount of air from multiple air ducts
- by installing air preheater and economizer along the gas path
Q19 | Which is most preferred type of draught system?
- chimney draught
- fan draught
- force draught
- balanced draught
Q20 | Which type of draught system is used in the locomotives?
- natural draught system
- balanced draught system
- forced draught system
- induced steam draught system
Q21 | Which draught system is also known as turbine draught?
- forced steam draught
- induced steam draught
- natural draught
- fan draught
Q22 | Which draught system is used as conjunction with chimney draught?
- forced steam draught
- forced draught
- induced draught
- balanced draught
Q23 | There are two types of water feeding in a boiler, they are ________ and _________
- open feed system and closed feed system
- condensed and raw
- feed-water and clean water
- hot and cold water
Q24 | In a fire tube boiler, the water to be heated is kept in the ________
- tubes of the setup
- shell of the setup with hot gas in tubes
- tank with a fire chamber that conducts heat by steel rods
- tank and heated by fire below it
Q25 | Which of the following statement is wrong?
- water tube boilers are internally fired
- locomotive boiler is a water tube boiler
- la-mont boiler is a low pressure water tube boiler
- all of the mentioned