Miscellaneous in Metallurgy MCQ Questions and Answers

21

The slowest mode of heat transfer.

A) Radiation B) conduction C) convection D) none of these

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Answer & Solution

Answer: Option B

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22

Material difficult to be spot welded is

A) Stainless steel B) Copper C) Mild steel sheet D) All of these

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Answer & Solution

Answer: Option B

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23

Engineering stress-strain curve for a metal under two conditions. A and B, are shown is the following figures. Identify the correct statement.
Miscellaneous in Metallurgy mcq question image

Miscellaneous in Metallurgy mcq question image

A) The resilience of the material is the same in conditions A and B B) The resilience of the material is higher in condition B than in condition A C) The toughness of the material is higher in condition A than in condition B D) The toughness of the material is higher in condition B than in conditon A

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Answer & Solution

Answer: Option D

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24

Open circuit voltage for arc welding is of the order of

A) 1 - 40 volts B) 40 - 95 volts C) 100 - 125 volts D) 130 - 170 volts

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Answer & Solution

Answer: Option B

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25

. . . . . . . . is the visible portion of the arc consisting of plasma (hot ionized gas) where the voltage drop is not sharp.

A) Arc Column B) Anode spot C) Anode space D) Cathode spot

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Answer & Solution

Answer: Option A

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26

Usually, softer constituent of a composite is

A) Matrix B) Reinforcement C) Both are of equal strength D) Can't define

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Answer & Solution

Answer: Option A

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27

The property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules.

A) surface tension B) viscosity C) Surface energy D) None of these

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Answer & Solution

Answer: Option A

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28

Jogs and Kinks

A) Jog in a Edge dislocation has Edge character B) Kink in a edge dislocation has screw character C) Both A and B D) None of these

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Answer & Solution

Answer: Option C

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29

How error function can be calculated in diffusion phenomena?

A) $$erf\left( {\frac{x}{{2\sqrt {Dt} }}} \right) = \frac{2}{{\sqrt \pi }}\int\limits_0^{\frac{X}{{2\sqrt {Dt} }}} {\exp \left( { - {\eta ^2}} \right)d\eta } $$ B) $$erf\left( x \right) = \frac{2}{{\sqrt \pi }}\int\limits_0^{\frac{X}{{2\sqrt {Dt} }}} {\exp \left( { - {\eta ^2}} \right)d\eta } $$ C) $$erf\left( t \right) = \frac{2}{{\sqrt \pi }}\int\limits_0^{\frac{X}{{2\sqrt {Dt} }}} {\exp \left( d \right)d\eta } $$ D) None of these

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Answer & Solution

Answer: Option A

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30

The mass flow process by which atoms changes its position related to their neighbors in a given phase under the influence of thermal energy & concentration gradient.

A) Diffusion B) conduction C) radiation D) convection

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Answer & Solution

Answer: Option A

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Miscellaneous in Metallurgy MCQ Questions and Answers | Metallurgical Engineering