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This set of Thermal Engineering 2 Multiple Choice Questions & Answers (MCQs) focuses on Thermal Engineering II Set 10
Q1 | An air preheater is installed ___________
- between the economiser and chimney
- before the superheater
- before the economiser
- none of the mentioned
Q2 | What is the length of shell of a Locomotive boiler?
- 2m
- 3m
- 4m
- 6m
Q3 | What is the function of a flywheel?
- to convert reciprocating motion of the piston into rotary motion
- to prevent fluctuation of speed
- to keep the engine speed uniform at all load conditions
- to convert rotary motion of the crankshaft into to and fro motion of the valve rod
Q4 | The shell diameter of a Locomotive boiler is?
- 1.5m
- 1m
- 2m
- 2.5m
Q5 | Which of the following is a water tube boiler?
- lancashire boiler
- cochran boiler
- babcock & wilcox boiler
- locomotive boiler
Q6 | The number of fire tubes in a Cochran boiler are ___________
- 75
- 165
- 225
- 175
Q7 | The chimney draught varies with?
- climatic conditions
- temperature of furnace gases
- height of chimney
- all of the mentioned
Q8 | The diagram factor is the ratio of ___________
- area of actual indicator diagram to the area of theoretical indicator diagram
- actual work done per stroke to the theoretical work done per stroke
- actual mean effective pressure to the theoretical mean effective pressure
- any of the above mentioned
Q9 | The diameter of a cylindrical shell of a Scotch marine boiler varies from ___________
- 3.5 to 4.5m
- 1.5 to 2m
- 2.5 to 3.5m
- none of the mentioned
Q10 | Lancashire boiler has _____ internal flue tubes.
- 1
- 3
- 2
- 4
Q11 | Locomotive boiler is a ___________
- single tube, vertical, externally fired & stationary boiler
- single tube, horizontal, internally fired& stationary boiler
- multitubular, horizontal, externally fired & stationary boiler
- multitubular, horizontal, internally fired & mobile boiler
Q12 | The equivalent evaporation is defined as?
- the ratio of heat actually used in producing the steam to the heat liberated in the furnace
- the amount of water evaporated or steam produced in kg of fuel burnt
- the amount of water evaporated from and at 100 degree c into dry & saturated steam
- none of the mentioned
Q13 | Non Condensing steam turbine can also be called as _________
- extraction steam turbine
- back pressure steam turbine
- impulse steam turbine
- none of the mentioned
Q14 | Condensing turbine is used for __________
- central power generation
- to reduce outlet temperature
- to increase efficiency of steam
- none of the mentioned
Q15 | Steam turbine is classified on basis of __________
- type of blades
- exhausting condition
- type of steam flow
- all of the mentioned
Q16 | High pressure turbine is a Non-Condensing turbine due to __________
- exhaust conditions
- axial flow of the steam
- pressure-velocity compounding
- velocity compounding
Q17 | Impulse blades are in the shape of __________
- rain drop
- circular
- half moon
- none of the mentioned
Q18 | Astern turbines are used in _________
- power generation
- marine purposes
- aircraft
- none of the mentioned
Q19 | In condensing turbines vacuum is obtained by ____________
- sudden pressure drop
- removal of non condensable gases
- sudden drop in pressure and by removal of non condensable gases
- none of the mentioned
Q20 | Cross compound steam turbines are once used in _____________
- generation of electricity
- marine ships
- automobiles
- none of the mentioned
Q21 | Where in industries do we find back-pressure turbines?
- at a point in industry where waste steam has to be employed
- when pressure needs to be applied at rear end
- when one turbine bolster other
- there is a requirement of process steam at single pressure
Q22 | The energy conversion occurring in a steam turbine is a ______ step process.
- 1
- 2
- 3
- 4
Q23 | A steam turbine is basically an assemblage of ____________
- nozzle & condenser
- blades & condenser
- nozzle & blades
- nozzle & fans
Q24 | A regenerative steam cycle renders ____________
- decreased work output per unit mass of steam
- increased thermal efficiency
- increased work output per unit mass of steam
- decreased work output per unit mass of steam as well as increased thermal efficiency
Q25 | The reheat factor is the ratio of the ____________
- total useful heat drop to the total isentropic heat drop
- cumulative heat drop to the isentropic heat drop
- isentropic heat drop to the heat supplied
- none of the mentioned