Mechanical Engineering MCQs

Page No. 44

A cold chisel is made of_______________?


amild steel

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bcast iron

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cH.S.S.

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dhigh carbon

✓


View Answer high carbon

German silver is an alloy of___________________?


asilver and some impurities

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brefined silver

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cnickel, copper and zinc

✓


dnickel and copper

✖



The basic constituents of Hastelloy are_________________?


aaluminium, copper etc

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bnickel, molybdenum etc

✓


cnickel, copper, etc

✖


dall of the above

✖



Machining properties of steel are improved by adding___________________?


asulphur, lead, phosphorous

✓


bsilicon, aluminium, titanium

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cvanadium, aluminium

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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”

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ccycle chains

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dgas turbine blades

✓


View Answer gas turbine blades

Maximum percentage of carbon in austenite is______________?


a0.025%

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b0.26%

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c0.8%

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d1.7%.

✓


View Answer 1.7%.

Hardness of steel depends on_________________?


aamount of carbon it contains

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bthe shape and distribution of the car-bides in iron

✓


cmethod of fabrication

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dcontents of alloying elements

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Annealing of white cast iron results in production of_________________?


amalleable iron

✓


bnodular iron

✖


cspheroidal iron

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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

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View Answer 50% or more iron

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