Mechanical Engineering MCQs

Page No. 41

Eutectoid steel contains following percentage of carbon_______________?


a0.02%

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b0.3%

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c0.63%

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d0.8%

✓


View Answer 0.8%

Basic constituents of Monel metal are _________________?


anickel, copper

✓


bnickel, molybdenum

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czinc, tin, lead

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dnickel, lead and tin

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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

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bduralumin

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cHastelloy

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dinvar

✓


View Answer invar

An engineer’s hammer is made of___________________?


acast iron

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bforged steel

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cmild steel

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dhigh carbon steel

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View Answer high carbon steel

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


aductile

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bmalleable

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chomogeneous

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danisotropic

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View Answer anisotropic

Cyaniding is the process of________________?


adipping steel in cyanide bath

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breacting steel surface with cyanide salts

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

✓


dobtaining cyanide salts

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


ahysteresis

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bcreep

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cvisco elasticity

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dBoeschinger effect

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View Answer Boeschinger effect

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


a600 VPN

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b1500 VPN

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c1000 to 1100 VPN

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d250 VPN

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View Answer 1000 to 1100 VPN

Weld decay is the phenomenon found with _________________?


acast iron

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bmild steel

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cnon-ferrous materials

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dstainless steel

✓


View Answer stainless steel

Hardness of upper bainite (acicular structure) is about___________________?


aRC 65

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bRC 48

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cRC 57

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dRC 80

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View Answer RC 48

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