Mechanical Engineering MCQs

Page No. 41

Eutectoid steel contains following percentage of carbon_______________?


a0.02%


b0.3%


c0.63%


d0.8%


View Answer 0.8%

Basic constituents of Monel metal are _________________?


anickel, copper


bnickel, molybdenum


czinc, tin, lead


dnickel, lead and tin


View Answer nickel, copper

Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is__________________?


asilver metal


bduralumin


cHastelloy


dinvar


View Answer invar

An engineer’s hammer is made of___________________?


acast iron


bforged steel


cmild steel


dhigh carbon steel


View Answer high carbon steel

By severely deforming a metal in a particular direction it becomes _________________?


aductile


bmalleable


chomogeneous


danisotropic


View Answer anisotropic

Cyaniding is the process of________________?


adipping steel in cyanide bath


breacting steel surface with cyanide salts


cadding carbon and nitrogen by heat treatment of steel to increase its surface hardness


dobtaining cyanide salts



The loss of strength in compression with simultaneous gain in strength in tension due to overloading is known as________________?


ahysteresis


bcreep


cvisco elasticity


dBoeschinger effect


View Answer Boeschinger effect

The surface hardness of the following order is achieved by nitriding operation__________________?


a600 VPN


b1500 VPN


c1000 to 1100 VPN


d250 VPN


View Answer 1000 to 1100 VPN

Weld decay is the phenomenon found with _________________?


acast iron


bmild steel


cnon-ferrous materials


dstainless steel


View Answer stainless steel

Hardness of upper bainite (acicular structure) is about___________________?


aRC 65


bRC 48


cRC 57


dRC 80


View Answer RC 48

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