The rocks generally used for roofing is
AGranite
BBasalt
CSlate
DTrap
ESAS · Question Bank
Engineering Materials
241 of 241 questions match · page 12 of 13. Answer in your head first, then check the solution.
Stainless steel resists corrosion due to
ACarbon
BSulfur
CChromium
DVanadium
In Galvanized iron, a lining on iron is provided with
ASn
BZn
CCu
DAl
The property of a material which allows it to be drawn into a smaller section is called
APlasticity
BDuctility
CElasticity
DMalleability
The first metal used by man was
AIron
BCopper
CGold
DBronze
The color of zinc is
AGreyish white
BGreenish white
CBluish white
DYellowish white
The iron that has been cooled quickly from a molten state is known as
ABlue cast iron
BPink cast iron
CBrown cast iron
DWhite cast iron
Which metal is protected by a layer of its own oxide?
AAluminum
BSilver
CGold
DIron
Copper when exposed to ordinary atmospheres becomes oxidized turning it into what color?
ABrown
BLight gray
CLight orange
DBlack
Constantan, an alloy used in thermocouples, is an alloy of
ACopper and tin
BCopper and zinc
CCopper and iron
DCopper and nickel
In cold working of metals
AClose dimensional tolerance cannot be maintained
BPoor surface finish is obtained
CRecrystallization temperature for steel is reduced
DStrength and hardness of steel is increased
What do you call earth and stone mixed with the iron oxides?
AHematite
BMagnetite
CGangue
DOre
The term “bronze” is used to designate any alloy containing
ACopper and zinc
BCopper and aluminium
CCopper and nickel
DCopper and tin
What do you call the removal of zinc from brasses?
ADezincification
BGraphitization
CStabilization
DDealloying
Steels can be strengthened by all of the following EXCEPT
AAnnealing
BQuenching and tempering
CWork hardening
DGrain refinement
Which of the following metals has the highest melting point?
ACopper
BGold
CSilver
DTungsten
The inner strand of ACSR is made of
ABrass
BSteel
CCopper
DLead
Aluminum alloys find ue in aircraft industry because of
AHigh strength
BLow sp. Gravity
CGood corrosion resistance
DGood weldability
The most effective alloying ingredient in increasing hardness is known as
ABoron
BSilicon
CSilver
DSodium
The simplest and most common grades of steel belong to the group of
ABoron steels
BCarbon steels
CNeon steels
DKrypton steels