Mechanical Engineering MCQs

Page No. 44

A cold chisel is made of_______________?


amild steel


bcast iron


cH.S.S.


dhigh carbon


View Answer high carbon

German silver is an alloy of___________________?


asilver and some impurities


brefined silver


cnickel, copper and zinc


dnickel and copper



The basic constituents of Hastelloy are_________________?


aaluminium, copper etc


bnickel, molybdenum etc


cnickel, copper, etc


dall of the above



Machining properties of steel are improved by adding___________________?


asulphur, lead, phosphorous


bsilicon, aluminium, titanium


cvanadium, aluminium


dchromium, nickel



Depth of hardness of steel is increased by addition of_________________?


anickel


bchromium


ctungsten


dvanadium


View Answer chromium

In which of the following cases, consideration of creep is important_________________?


aflywheel of steam engine


bcast iron pipes”


ccycle chains


dgas turbine blades


View Answer gas turbine blades

Maximum percentage of carbon in austenite is______________?


a0.025%


b0.26%


c0.8%


d1.7%.


View Answer 1.7%.

Hardness of steel depends on_________________?


aamount of carbon it contains


bthe shape and distribution of the car-bides in iron


cmethod of fabrication


dcontents of alloying elements



Annealing of white cast iron results in production of_________________?


amalleable iron


bnodular iron


cspheroidal iron


dgrey iron


View Answer malleable iron

Steel contains____________________?


a80% or more iron


b50% or more iron


calloying elements like chromium, tungsten nickel and copper


delements like phosphorus, sulphur and silicon in varying quantities


View Answer 50% or more iron

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