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Steam Boilers, Engines, Nozzles And Turbines MCQ
480 Important Steam Boilers, Engines, Nozzles And Turbines MCQ Question and Answer | PDF Free Download
1.For maximum discharge through a chimney, the condition is that height of hot gas column producing the draught should be
- AOne-half the height of chimney
- BEqual to the height of chimney
- CTwo times the height of chimney
- DFour times the height of chimney
2.The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called
- ANatural draught
- BInduced draught
- CForced draught
- DBalanced draught
3.In cross compounding, the cylinders are arranged
- ASide by side and each cylinder has common piston, connecting rod and crank
- BSide by side and each cylinder has separate piston, connecting rod and crank
- CAt 90° and each cylinder has common piston, connecting rod and crank
- DAt 90° and each cylinder has separate piston, connecting rod and crank
4.The reheat factor depends upon
- AInitial pressure and superheat
- BExit pressure
- CTurbine stage efficiency
- DAll of these
5.The Parsons' reaction turbine has
- AOnly moving blades
- BOnly fixed blades
- CIdentical fixed and moving blades
- DFixed and moving blades of different shape
6.Which is not correct statement about the function of furnace?
- ATo provide proper conditions for continuous complete combustion
- BMix fuel with air and ignite
- CSeparate ash from coal
- DMaintain heat supply to prepare and ignite the incoming fuel
7.A nozzle is said to be a convergent nozzle
- AWhen the cross-section of the nozzle increases continuously from entrance to exit
- BWhen the cross-section of the nozzle decreases continuously from entrance to exit
- CWhen the cross-section of the nozzle first decreases from entrance to throat and then increases from its throat to exit
- DNone of the above
8.In an impulse reaction turbine, the pressure drops gradually and continuously over
- AFixed blades
- BMoving blades
- CBoth fixed and moving blades
- DNone of these
9.Locomotive type' boiler is
- AHorizontal multi-tubular water tube boiler
- BWater wall enclosed furnace type
- CVertical tubular fire tube type
- DHorizontal multi-tubular fire tube type
10.For the same diameter and thickness of tube, a water tube boiler compared to a fire tube boiler has
- AMore heating surface
- BLess heating surface
- CEqual heating surface
- DHeating surface depends on other parameters
11.There is always some steam left in the clearance space from the previous stroke. This steam left in the clearance space is called
- AWet steam
- BSaturated steam
- CSuperheated steam
- DCushion steam
12.When steam after doing work in the cylinder passes into a condenser, the engine is said to be a
- ASlow speed engine
- BVertical steam engine
- CCondensing steam engine
- DNon-condensing steam engine
13.Hard coke is used in
- ACement industry
- BThermal power plant
- CBlast furnace
- DDomestic use
14.Degree of reaction is defined as the ratio of
- AHeat drop in fixed blades to the heat drop in moving blades
- BHeat drop in moving blades to the heat drop in fixed blades
- CHeat drop in moving blades to the heat drop in fixed blades plus heat drop in moving blades
- DHeat drop in fixed blades plus heat drop in moving blades to the heat drop in moving blades
15.Which of the following boilers is best suited to meet fluctuating demands?
- ABabcock and Wilcox
- BLocomotive
- CLancashire
- DCochran
16.The average value of diagram factor lies between
- A0.2 to 0.5
- B0.5 to 0.65
- C0.65 to 0.9
- D0.8 to 1.2
17.The value of diagram factor depends upon
- AInitial conditions of steam
- BBack pressure
- CInitial pressure of steam
- DAll of these
18.Desecration of feed water is carried out because it reduces
- ACavitation of boiler feed pumps
- BCorrosion caused by oxygen
- CHeat transfer coefficient
- DpH value of water
19.The equivalent evaporation of a boiler is a measure to compare
- AThe given boiler with the model
- BThe two different boilers of the same make
- CTwo different makes of boilers operating under the same operating conditions
- DAny type of boilers operating under any conditions
20.The flow of steam is supersonic
- AAt the entrance to the nozzle
- BAt the throat of the nozzle
- CIn the convergent portion of the nozzle
- DIn the divergent portion of the nozzle