A. decrease

B. remain same

C. show unpredictable behaviour

E. first increase and then decrease

A. ductility

B. hardness

D. malleability

E. surface finish

A. molecular change

C. atomic change

D. solidus change

E. physical change

A. all of the above

C. none of the above

D. ability to undergo large permanent deformations in tension

E. ability to recover its original form

A. creep

C. superhardening

D. hot tempering

E. fatigue

A. stages at which properties do not change with increase in temperature

B. there is nothing like points of arrest

C. none of the above

D. stages at which further heating does not increase temperature for some time

A. cubic structure

B. hexagonal close packed

C. orthorhombic crystal

E. face centred cubic

A. stresses induced in all directions

B. density throughout

D. thermal properties in all directions

E. electric and magnetic properties in all directions

A. none of the above

B. in which stress remains constant on in-creasing load

C. stress reduces on increasing load

D. in which parts are not loaded

B. 1400-1539C

C. 910-1440C

D. above 1539C

E. 770 910C

A. has its atoms distributed in a random pattern

B. none of the above

C. responds to heat treatment

D. has a fixed structure under all conditions

A. 5 7%

B. 1 2%

C. 7-9%.

E. 0.5 to 1%

B. special steel

C. high carbon steel

D. medium carbon steel

E. alloy steel

A. the points where major changes take place

B. constant for all metals

D. the points where no further change oc-curs

E. the points where there is no further flow of metal

A. cementlte

C. bainite

D. austenite

E. pearlite

B. free carbon

C. nodular aggregates of graphite

D. cementite

E. spheroids

A. 1050C

B. below recrystallisation temperature

C. above recrystallization temperature

D. 910C

A. visco elasticity

B. hysteresis

C. creep

D. inelasticity

A. white iron

C. malleable iron

D. wrought iron

E. cast iron

A. chromium, nickel

B. lubricants

D. silicon, aluminium, titanium

E. vanadium, aluminium

B. release stresses

C. reduce hardness and brittleness

D. improve ductility

E. improve toughness

A. mild steel

C. cast iron

D. copper

E. brass

A. pearlite

C. all of the above

D. cementite

E. austenite

A. kind of stainless steel

B. none ferrous alloy

D. cutting tool material

E. polymer

A. 90% magnesium and 9% aluminium with some copper

B. 92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg

C. 10% aluminium and 90% tin

E. 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe

A. brittleness

B. corrosion resistance

C. plasticity

D. tenacity

A. german silver

C. gun metal

D. cast iron

E. stainless steel

B. heat treatment employed

C. method of manufacture

D. %age of alloying elements

E. %age of carbon

B. RC 32.

C. RC 65

D. RC 57

E. RC 80

B. duralumin

C. silver metal

D. monel metal

E. Hastelloy

B. none of the above

C. in which atoms align themselves in a geometric pattern upon solidification

D. which emits fumes on melting

E. which is not attacked by phosphorous

A. corrosion resistance is good

B. fatigue strength is not high

C. modulus of elasticity is fairly low

E. creep strength limits its use to fairly low temperatures

A. equal to 7

B. pH value has nothing to do with basic solution

C. less than 7

E. none of the above

A. magnin

B. peiminvar

D. elinvar

E. invar

A. 0.1 to 1.2%

C. 4.5 to 6.3%.

D. 2.5 to 4%

E. 1.5 to 2.5%

A. providing high strength at elevated temperatures

C. raising the elastic limit

D. improving the resilience and ductility

E. providing corrosion resistance

B. provides high hot hardness

C. promotes decarburisation

D. promotes retention of austenite

E. increases toughness

B. graphite

C. free carbon

D. white carbon

E. ferrite

A. precipitation

C. recrystallisation

D. heat treatment

E. austempering

A. homogeneous

B. ductile

C. malleable

E. isotropic

B. grain refinement

C. none of the above

D. purification of metal

E. working at lower temperature

A. asbestos cement

B. concrete

C. vitrified clay

D. mild steel

B. 0.7%.

C. 0.05%

D. 0.30%

E. 0.50%

B. tin base alloy

C. lead base alloy

D. copper base alloy

E. all of the above

A. least resistant to corrosion

B. high in strength

C. heat treated to change its properties

E. hard

A. cast iron steel

B. tungsten steel

D. alloy steel

E. mild steel

A. none of the above

B. high ductility

C. high tensile strength

E. all of the above

A. makes steel hard

B. refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties

C. gives ductility, toughness, tensile strength and anticorrosion properties

E. improves cutting ability and reduces hardenability

A. grey cast iron, wrought iron, low carbon steel

C. wrought iron,low carbon steel, grey cast iron

D. low carbon steel, grey cast iron, wrought iron

E. wrought iron, grey cast iron, low carbon steel

A. pearlite

C. ferrite and cementite

D. ferrite and pearlite

E. anstenite