Mechanical Engineering MCQs

Page No. 78

Engine pistons ‘are usually made of aluminium alloy because it_________________?


ais lighter


bwears less


cabsorbs shocks


dis stronger


View Answer is lighter

In diesel engine, the compression ratio in comparison to expansion ratio is_______________?


asame


bless


cmore


dvariable


View Answer more

Polymerisation is a chemical process in which molecules of a compound become________________?


alarger


bslowed down


csmaller


dliquid


View Answer larger

Gaseous-fuel guarantees are based on___________________?


acalorific value of oil


blow heat value of oil


chigh heat value of oil


dmean heat value of oil


View Answer low heat value of oil

A 75 cc engine has following parameter as 75 cc ___________________?


afuel tank capacity


blub oil capacity


cswept volume


dcylinder volume


View Answer swept volume

When crude oil is heated, then which of the following hydrocarbon is given off first______________?


akerosene


bgasoline


cparaffin


dnatural gas


View Answer natural gas

Diesel fuel, compared to petrol is_________________?


aless difficult to ignite


bjust about the same difficult to ignite


cmore difficult to ignite


dhighly ignitable



The air-fuel ratio of the petrol engine is controlled by__________________?


afuel pump


bgovernor


cinjector


dcarburettor


View Answer carburettor

The accunmulation of carbon in a cylinder results in increase of________________?


aclearance volume


bvolumetric efficiency


cignition time


deffective compression ratio



The precess of breaking up or a lipuid into fine droplets by spraying is called___________________?


avaporisation


bcarburetion


cionisation


datomisation


View Answer atomisation

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