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This set of Thermal Engineering 2 Multiple Choice Questions & Answers (MCQs) focuses on Thermal Engineering II Set 8
Q1 | In velocity compounded turbines flow passage is from ____________
- moving blades to fixed nozzles
- fixed nozzles to moving blades
- fixed blades to moving nozzles
- none of the mentioned
Q2 | A velocity compounded impulse turbine is also called as __________
- curtis wheel
- pressure compounded
- curtis wheel & pressure compounded
- none of the mentioned
Q3 | Reaction turbine is also called as _________
- impulse turbine
- curtis wheel
- parsons turbine
- none of the mentioned
Q4 | Compounding is used for _________ power applications.
- low
- high
- medium
- none of the mentioned
Q5 | Which type of boiler is it when the furnace is placed in the region of boiling water?
- internally fired boiler
- externally fired boiler
- babcock-wilcox boiler
- stirling boiler
Q6 | What type of boiler is a Lamont boiler?
- forced circulation
- natural circulation
- over-through
- positive forced circulation
Q7 | What is called as the heart of the Lamont boiler?
- water drum
- centrifugal pump
- furnace
- blower
Q8 | In what form are the boiler’s tube arrange in Lamont boiler?
- parallel in vertical
- inclined vertically
- parallel in horizontal
- horizontally inclined
Q9 | Through which does the even circulation of feed water is possible in Lamont boiler?
- nozzles
- water trough
- feed pump
- hose
Q10 | What is the pressure range between which Lamont boilers operates?
- 80-120bar
- 120-160bar
- 180-360bar
- 450-560bar
Q11 | What type of steam is generated by evaporator tube of Lamont boiler?
- saturated steam
- unsaturated steam
- superheated steam
- flash steam
Q12 | What is the main disadvantage of Lamont boiler?
- less flexible in design
- low heat transfer rate
- formation of bubbles
- low steam generation capacity
Q13 | What type of boiler is a Benson boiler?
- super critical boiler
- fire tube boiler
- natural circulation boiler
- over-through boiler
Q14 | What is the capacity of Benson boiler?
- 180 tonnes/hr & above
- 150 tonnes/hr & above
- 250 tonnes/hr & above
- 300 tonnes/hr & above
Q15 | What is the major disadvantage of the Benson boilers?
- boiler is big in size
- has large storage capacity
- deposition of salts
- bubble formation
Q16 | Why starting valve is closed and valve 2 is opened while taking boiler on range in Benson boiler?
- avoid excessive heating of tube
- to maintain the constant flow of water
- to avoid pressure built up in tubes
- to avoid pipe leakages at joints
Q17 | What is the function of boiler?
- to burn the fuel in a confined closed system with the supply of air
- to generate steam at varying pressure
- to generate steam at constant pressure
- to produce flue gases by burning fuel at a given pressure
Q18 | Why single boiler unit per turbine is equipped commonly?
- for better turbine control
- to deduce the costs
- for overcoming losses of power
- to improve the efficiency
Q19 | How can be the plant efficiency of steam power plant is increased?
- by using high pressure and high temperature steam
- by equipping ash and flue gas clearance system
- by maintaining the boiler on daily basis by cleaning the soot and combustion products
- by using better and efficient type of fuel for combustion
Q20 | What is the temperature at which the steam boilers are capable to withstand?
- 200oc
- 280oc
- 540oc
- 358oc
Q21 | What is needed to be increased to increase the heat transfer rate in the boiler?
- gas velocities
- fuel input
- water velocities
- air supply
Q22 | In what is water in high pressure boiler circulated through?
- conduits
- cove
- channel
- tubes
Q23 | Where is water steam separator drum located in Lamont boiler?
- inside of the boiler
- right above the furnace
- before the feed water pump
- outside of boiler
Q24 | Which of the given boilers velocity of flue gases is greater than velocity of sound?
- benson boiler
- la-mont boiler
- schmidt-hartmann boiler
- velox boiler
Q25 | Which boiler is most successful boiler in the gas turbine industries?
- because it has greater flexibility
- it is easy to control, it’s fully automatic
- it has higher thermal efficiency of all
- can increase heat transfer without changing its size