Mechanical Engineering MCQs

Page No. 185

To aviod moisture troubles, the compressed air main line should __________________?


arise gradually towards the point of use


bdrop gradually towards the point of use


cbe laid vertically


dbe laid exactly horizontally



The area of actual indicator diagram on an air compressor as compared to area of ideal indicator diagram is_____________________?


aless


bmore


csame


dmore/less depending on compressor capacity


View Answer more

The thrust on the rotor in a centrifugal compressor is produced by________________?


aradial component


baxial component


ctangential component


dresultant component


View Answer axial component

A compressor at high altitude will draw________________?


amore power


bless power


csame power


dmore/less power depending on other factors


View Answer less power

A centrifugal compressor works on the principle of__________________?


aconversion of pressure energy into kinetic energy


bconversion of kinetic energy into pres¬sure energy


ccentripetal action


dgenerating pressure directly



The compressor performance at higher altitude compared to sea level will be _______________?


asame


bhigher


clower


ddependent on other factors


View Answer lower

During peak load periods, the best method of controlling compressors is___________________?


astart-stop motor


bconstant speed unloader


crelief valve


dvariable speed



An air compressor may be controlled by____________________?


athrottle control B. clearance control


bblow-off control


cany one of the above


dnone of the above


View Answer any one of the above

Separators in compressor installations are located_____________________?


abefore intercooler


bafter intercooler


cafter receiver


dbetween after-cooler and air receiver



Mining industry usually employs following motive power___________________?


aA.C. electric motor


bcompressed air


cpetrol engine


ddiesel engine


View Answer compressed air

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