Mechanical Engineering MCQs

Page No. 28

Kinematic viscosity is equal to_________________?


adynamic viscosity/density


bdynamicviscosity x density


cdensity/dynamic viscosity


d1/dynamicviscosity x density



Increase in pressure at the outer edge of a drum of radius R due to rotation at corad/sec, full of liquid of density p will be___________________?


apco2/?2


bpco2/?2/2


c2pa2R2


dpa2R/2


View Answer pco2/?2/2

A balloon lifting in air follows the following principle_____________________?


alaw of gravitation


bArchimedes principle


cprinciple of buoyancy


dall of the above


View Answer all of the above

Specific weight of water in S.I. units is equal to ________________?


a1000 N/m3


b10000 N/m3


c9.81 xlO3 N/m3


d9.81 xlO6N/m3


View Answer 9.81 xlO3 N/m3

Bell metal contains_____________________?


a70% copper and 30% zinc


b90% copper and 10% tin


c85-92% copper and rest tin with little lead and nickel


d70-75% copper and rest tin



The correct sequence for descending order of machinability is _____________________?


agrey cast iron, low carbon steel, wrought iron


blow carbon steel, grey cast iron, wrought iron


cwrought iron,low carbon steel, grey cast iron


dwrought iron, grey cast iron, low carbon steel



Aluminium bronze contains aluminium and copper in the ratio of___________________?


a50 : 50


b40 : 60


c60 : 40


d10 : 90


View Answer 10 : 90

Muntz metal contains copper and zinc in the ratio of________________?


a50 : 50


b40 : 60


c60 : 40


d20 : 80


View Answer 60 : 40

Perminvar alloy having constant permeability is an alloy of________________?


anickel, copper and iron


bnickel, copper and zinc


ccopper, nickel and antimony


diron, zinc and bismuth



Monel metal contains_________________?


a63 to 67% nickel and 30% copper


b88% copper and 10% tin and rest zinc


calloy of tin, lead and cadmium


dmalleable iron and zinc



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