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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