Engineering Materials Set 5 MCQs

Q1 | Any process of heating and cooling steel that produces a rounded or globular from of carbide is known as

Spheroidizing

Drawing

Nomalizing

Nitriding

Ultra hardening

Q2 | During stress relaxation phenomenon

Deformation tends to bind the joint and produces a stress reduction

Deformation tends to loosen the joint and produces a stress reduction

Stress is no longer proportional to strain

Stress reduces on increasing load

None of the above

Q3 | The materials which has the same elastic properties in all directions is called

Brittle material

Homogeneous material

Hard material

Isotropic material

Isentropic material

Q4 | Accounstical materials

Isentropic material

Create sound

Absorb sound

Reflect sound

Q5 | Recrystallistion temperature is one

At which change of allotropic form takes place.

At which crystals start growing in size

At which new spherical crystals first begin to form from the old deformed ones when a strained metal is heated

At which polycrystalline changes occur

At which crystals again begin to appear

Q6 | Super conductors

Exist at temperatures below 10?K

Are non-crystalline

Are non-metallic substances

Are the purest forms of metals

Are the density metals without voids

Q7 | In powder metallurgy the process of heating the cold pressed metal powder is known as

Sintering

Granulation

Deposition

Precipitation

None of the above

Q8 | The main constituent of glass is

B2O3

Al2O3

Semi-conductors

CaCO3

SiO2

Q9 | In iron-iron carbide diagram the

Abscissa is time

Abscissa is temperature

Abscissa is carbon percentage

Ordinate is time

None of the above

Q10 | Spot the process which is different from others?

Galvanizing

Chapmanizing

Carburizing

Cyaniding

Nitriding

Q11 | The Curic point for Rochelle salt is about

1000?C

500?C

240?C

Absolute zero

None of the above

Q12 | Which of the following is the ductile material?

Aluminium

Zinc

Brass

Silver

Stainless steel

Q13 | The structure of a semi-conductor resemles that of a

circle

rhombus

diamond

triangle

None of the above

Q14 | In electro-forming the metal is supplied to the mould from

Solution

By liquids

Electrolytic solution in which bar of pure metal acts as an anode for the plating current

Separately by coating with a point

None of the above

Q15 | A bot in cupola is

A part of coupla

A defect in casting

A kind of cast iron

A flux

A clay plug to close tap hole

Q16 | Constantan is an alloy of

Copper-tin-zinc

Copper-tin

Copper-aluminium

Copper and Nickel

Nickel-iron-chromium

Q17 | Hot tear

Is a defect in castings

Is a process involving heating

Is a defect in wood

Is a phenomenon occurring in materials ixposed to weather e.g. sun and rain

Is a physical property of non-ferrous materials

Q18 | Coarse grained steels

Do not have tendency to distort

Are less tough

Are very tough

Are lighter

Are denser

Q19 | In press work the dies that perform two or more operations simultaneously, but at different stations are known as

Multi-dies

Simple dies

Compound dies

Die and punch set

Progressive dies

Q20 | Vanadium is added to steel as an alloying element to

To soften the material

Increase temperture resistance

Increases resistance to corrosion

Increase shock resistance

Modify yield and tensile strength properties

Q21 | Micro-structure of a material is generally examined by

Spectroscope techniques

Optical microscope

X-rays and electron diffraction

Naked eye

Microscope

Q22 | Ferri-magnetic materials generally find application as

conductors

insulators

resistors

semi-conductors

None of the above

Q23 | Which process is used for machining parts to planned dimensions?

Shearadising

Swaging

Electroforming

Anodizing

Routing

Q24 | Polymers

Semi-conductors

Can be vaporised but cannot be recycled

Can be recycled but cannot be vaporised

Can be vaporised as well as recycled

Can neither be vaporised nor recycled

Q25 | Which of the following is a fuel used in fast reactors?

Chromium

Plutonium

Zirconium

Heavy water

Graphite