Electrical Engineering MCQs

Page No. 303

Method which is commonly applied for unloading the coal for small power plant is___________?


alift trucks

✖


b coal accelerators

✓


ctower cranes

✖


dbelt conveyor

✖


View Answer coal accelerators

Load carrying capacity of belt conveyor is about___________?


a20 to 40 tonnes/hr

✖


b 50 to 100 tonnes/hr

✓


c100 to 150 tonnes/hr

✖


d150 to 200 tonnes/hr

✖



In coal preparation plant, magnetic separators are used to remove___________?


adust

✖


bclinkers

✖


c iron particles

✓


dsand

✖


View Answer iron particles

Secondary air is the air used to______________?


a reduce the flame length

✖


bncrease the flame length

✖


c transport and dry the coal

✖


dprovide air round the burners for getting optimum combustion

✓



Primary air is that air which is used to_____________?


areduce the flame length

✖


bincrease the flame length

✖


ctransport and dry the coal

✓


dprovide air around burners for get¬ting optimum combustion

✖



Caking coals are those which__________?


aburn completely

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bburn freely

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cdo not form ash

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dform lumps or masses of coke

✓



The capacity of large turbo-generators varies from___________?


a20 to 100 MW

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b50 to 300 MW

✓


c. 70 to 400 MW

✖


d100 to 650 MW

✖


View Answer 50 to 300 MW

Economisers improve boiler efficiency by__________?


a1 to 5%

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b 4 to 10%

✓


c10 to 12%

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d1 to 5%

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View Answer 4 to 10%

Steam pressure in a steam power station, which is usually kept now-a-days is of the order of____________?


a 20 kgf/cm2

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b50 kgf/cm2

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c 100 kgf/cm2

✖


d150 kgf/cm2

✓


View Answer 150 kgf/cm2

Load center in a power station is___________?


acenter of coal fields

✖


bcenter of maximum load of equipments

✖


c center of gravity of electrical system

✓


dcenter of coal fields

✖



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