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


bburn freely


cdo not form ash


dform lumps or masses of coke



The capacity of large turbo-generators varies from___________?


a20 to 100 MW


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%


b 4 to 10%


c10 to 12%


d1 to 5%


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


b50 kgf/cm2


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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