Mechanical Engineering MCQs

Page No. 185

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


arise gradually towards the point of use

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bdrop gradually towards the point of use

✓


cbe laid vertically

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dbe laid exactly horizontally

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


aless

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bmore

✓


csame

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dmore/less depending on compressor capacity

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View Answer more

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


aradial component

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baxial component

✓


ctangential component

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dresultant component

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View Answer axial component

A compressor at high altitude will draw________________?


amore power

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bless power

✓


csame power

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dmore/less power depending on other factors

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View Answer less power

A centrifugal compressor works on the principle of__________________?


aconversion of pressure energy into kinetic energy

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bconversion of kinetic energy into pres¬sure energy

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ccentripetal action

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dgenerating pressure directly

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


asame

✖


bhigher

✖


clower

✓


ddependent on other factors

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View Answer lower

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


astart-stop motor

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bconstant speed unloader

✓


crelief valve

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dvariable speed

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An air compressor may be controlled by____________________?


athrottle control B. clearance control

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bblow-off control

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cany one of the above

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dnone of the above

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View Answer any one of the above

Separators in compressor installations are located_____________________?


abefore intercooler

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bafter intercooler

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cafter receiver

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dbetween after-cooler and air receiver

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Mining industry usually employs following motive power___________________?


aA.C. electric motor

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bcompressed air

✓


cpetrol engine

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ddiesel engine

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View Answer compressed air

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