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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.The average operating pressure of Benson boiler is
- A100 bar
- B150 bar
- C200 bar
- D250 bar
2.At which pressure the properties of water and steam become identical
- A0.1 kg/cm²
- B1 kg/cm²
- C100 kg/cm²
- D225.6 kg/cm²
3.The draught may be produced by a
- AMechanical fan
- BChimney
- CA steam jet
- DAll of these
4.In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of
- A10 atmospheres
- B20 atmospheres
- C30 atmospheres
- D40 atmospheres
5.The efficiency of a pressure-velocity compounded impulse turbine is __________ as compared to pressure compounded impulse turbine.
- ASame
- BLess
- CMore
- DNone of these
6.The relative heat absorption for successively added equal areas of boiler convection heating surfaces
- AIncreases
- BDecreases
- CRemain unaffected
- DFirst increases and then decreases
7.The fittings mounted on the boiler for its proper and safe functioning is a
- AWater level indicator
- BPressure gauge
- CSafety valve
- DAll of these
8.Pulverized fuel is used for
- ABetter burning
- BMore calorific value
- CLess radiation loss
- DMedium sized units
9.In forced circulation steam boilers, the force is applied
- ATo draw water
- BTo circulate water
- CTo drain off the water
- DAll of these
10.Which of the following gases has the highest calorific value?
- AProducer gas
- BCoal gas
- CWater gas
- DBlast furnace gas
11.The heat balance sheet for the boiler shows the
- AComplete account of heat supplied by 1 kg of dry fuel and the heat consumed
- BMoisture present in the fuel
- CSteam formed by combustion of hydrogen per kg of fuel
- DAll of the above
12.The pressure of steam in the engine cylinder at the beginning of the stroke is ________ the boiler pressure.
- AEqual to
- BLess than
- CHigher than
- DNone of these
13.Which of the following is not a boiler mounting?
- ABlow off cock
- BFeed check valve
- CEconomiser
- DFusible plug
14.The effect of bleeding is that
- AIt increases the thermodynamic efficiency of the turbine
- BBoiler is supplied with hot water
- CIt decreases the power developed by the turbine
- DAll of the above
15.One kilowatt-hour energy is equivalent to
- A1000 J
- B360 kJ
- C3600 kJ
- D3600 kW/sec
16.The behavior of coal in a furnace is determined by
- AThe content of sulphur
- BThe content of ash and heating value
- CThe proximate analysis
- DThe exact analysis
17.Stage efficiency is also known as
- ADiagram efficiency
- BNozzle efficiency
- CGross efficiency
- DNone of these
18.Blading efficiency is also known as
- AStage efficiency
- BDiagram efficiency
- CNozzle efficiency
- DNone of these
19.Willian's law states that the steam consumption per hour provided with a throttled governor is proportional to (where I.P. = Indicated power)
- A1/(I.P)
- B1/(I.P)²
- CI.P.
- D(I.P.)²
20.Expanding steam to a very low pressure (high vacuum) in steam engines is
- ADesirable
- BEconomical
- CEssential
- DUneconomical