Engineering Materials MCQs Latest – Competitive Mechanical Engineering MCQs

Engineering Materials MCQs Latest – Competitive Mechanical Engineering MCQs

This post is comprising of latest “Engineering Materials MCQs Latest – Competitive Mechanical Engineering MCQs “. Here you’ll get latest mechanical engineering mcqs for written test, interview with answers. If you want to improve your knowledge regarding mechanical engineering then read these mcqs of Design of Steel Structures.

Latest Mechanical Engineering MCQs

By practicing these MCQs of Mechanical Engineering MCQs – Engineering Materials Mcqs, an individual for exams performs better than before. This post comprising of mechanical engineering objective questions and answers related to Engineering Materials Mcqs“. As wise people believe “Perfect Practice make a Man Perfect”. It is therefore practice these mcqs of mechanical engineering to approach the success. Tab this page to check “Latest Engineering Materials Mcqs” for the preparation of competitive mcqs, FPSC mcqs, PPSC mcqs, SPSC mcqs, KPPSC mcqs, AJKPSC mcqs, BPSC mcqs, NTS mcqs, PTS mcqs, OTS mcqs, Atomic Energy mcqs, Pak Army mcqs, Pak Navy mcqs, CTS mcqs, ETEA mcqs and others.

Latest Engineering Materials Mcqs

The most occurred mcqs of Engineering Materials in past papers. Past papers of Engineering Materials Mcqs. Past papers of Engineering Materials Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Engineering Materials Mcqs. The Important series of Engineering Materials Mcqs are given below:

Malleability of a material can be defined as ______________________?

A. ability to undergo large permanent deformations in compression
B. ability to undergo large permanent deformations in tension
C. ability to recover its original form
D. all of the above
E. none of the above

Mild steel belongs to the following category___________________?

A. low carbon steel
B. high carbon steel
C. medium carbon steel
D. alloy steel
E. special steel

Stress relaxation is- the phenomenon ___________________?

A. in which stress remains constant on in-creasing load
B. in which parts are not loaded
C. in which deformation tends to loosen the joint and produces a stress reduced
D. stress reduces on increasing load
E. none of the above

Isotropic materials are those which have the same ____________________?

A. elastic properties in all directions
B. thermal properties in all directions
C. stresses induced in all directions
D. electric and magnetic properties in all directions
E. density throughout

The ability of a material to resist softening at high temperature is known as____________________?

A. hot tempering
B. creep
C. hot hardness
D. fatigue
E. superhardening

The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to l00°C will _________________?

A. increase
B. first increase and then decrease
C. remain same
D. decrease
E. show unpredictable behaviour

Points of arrest for iron correspond to__________________?

A. stages at which allotropic forms change
B. there is nothing like points of arrest
C. stages at which properties do not change with increase in temperature
D. stages at which further heating does not increase temperature for some time
E. none of the above

A material is known as allotropic or polymorphic if it __________________?

A. responds to heat treatment
B. exists in several crystal forms at different temperatures
C. has a fixed structure under all conditions
D. has its atoms distributed in a random pattern
E. none of the above

Which of the following constituents of steels is softest and least strong ________________?

A. pearlite
B. austenite
C. ferrite
D. cementlte
E. bainite

The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is _______________?

A. 770°C
B. 1050°C
C. 910°C
D. below recrystallisation temprature
E. above recrystallization temprature

Ferromagnetic alpha iron exists in temperature range of________________?

A. below 723°C
B. 910-1440°C
C. 770-910°C
D. 1400-1539°C
E. above 1539°C

A reversible change in the atomic structure of steel with corresponding change in the properties is known as___________________?

A. physical change
B. molecular change
C. allotropic change
D. solidus change
E. atomic change

The crystal of alpha iron is ____________________?

A. body centred cubic
B. hexagonal close packed
C. face centred cubic
D. cubic structure
E. orthorhombic crystal

For the allotropic forms of iron, the points of arrest are __________________?

A. constant for all metals
B. the points where no further change occurs
C. the points where there is no further flow of metal
D. the points of discontinuity
E. the points where major changes take place

The percentage of carbon in grey iron castings usually varies between __________________?

A. 1 – 2%
B. 0.5 to 1%
C. 2.5 to 4.5%
D. 5 – 7%
E. 7-9%.

The unique property of cast iron is its high ___________________?

A. ductility
B. malleability
C. surface finish
D. damping characteristics
E. hardness

In grey cast iron, carbon is present in the form of____________________?

A. free carbon
B. cementite
C. flakes
D. spheroids
E. nodular aggregates of graphite

In malleable iron, carbon is present in the form of___________________?

A. free carbon
B. cementite
C. flakes
D. spheroids
E. nodular aggregates of graphite

The following types of materials are usually the most ductile__________________?

A. face-centred cubic lattice
B. hexagonal close-packed lattice
C. body-centred cubic lattice
D. all of the above
E. none of the above

Sulphur in pig iron tends to make it___________________?

A. hard’
B. ductile
C. soft
D. tough
E. malleable

Iron is ____________________?

A. ferroelectric
B. ferromagnetic
C. paramagnetic
D. dielectric
E. none of the above

Chilled cast iron has____________________?

A. no graphite
B. a low percentage of graphite
C. a very high percentage of graphite
D. graphite as its basic constituent of composition
E. none of the above is true

White cast iron contains carbon in the form of__________________?

A. graphite
B. free carbon
C. cementite
D. white carbon
E. ferrite

An important property of high silicon (12 – 18%) cast iron is the high__________________?

A. brittleness
B. tenacity
C. plasticity
D. corrosion resistance
E. hardness

Steel contains____________________?

A. alloying elements like chromium, tungsten nickel and copper
B. 50% or more iron
C. 80% or more iron
D. elements like phosphorus, sulphur and silicon in varying quantities
E. high quantities of sulphur

Annealing of white cast iron results in production of_________________?

A. malleable iron
B. spheroidal iron
C. nodular iron
D. grey iron
E. none of the above

Hardness of steel depends on_________________?

A. method of fabrication
B. the shape and distribution of the car-bides in iron
C. amount of carbon it contains
D. contents of alloying elements
E. the quality of ore from which it is made

Maximum percentage of carbon in austenite is______________?

A. 0.26%
B. 0.025%
C. 0.8%
D. 1.25%
E. 1.7%.

In which of the following cases, consideration of creep is important_________________?

A. cast iron pipes”
B. flywheel of steam engine
C. cycle chains
D. gas turbine blades
E. piston I.C. engine

Depth of hardness of steel is increased by addition of_________________?

A. tungsten
B. chromium
C. nickel
D. vanadium
E. ell of the above

Machining properties of steel are improved by adding___________________?

A. sulphur, lead, phosphorous
B. vanadium, aluminium
C. silicon, aluminium, titanium
D. chromium, nickel
E. lubricants

The basic constituents of Hastelloy are_________________?

A. nickel, copper, etc
B. nickel, molybdenum etc
C. aluminium, copper etc
D. all of the above
E. none of the above

German silver is an alloy of___________________?

A. refined silver
B. silver and some impurities
C. nickel, copper and zinc
D. nickel and copper
E. silver and gold

A cold chisel is made of_______________?

A. cast iron
B. mild steel
C. H.S.S.
D. high carbon
E. german silver

Inconel is an alloy of___________________?

A. nickel, chromium and iron
B. nickel, chromium
C. nickel, copper
D. nickel, zinc
E. nickel, lead

Solder is an alloy consisting of________________?

A. tin and lead
B. tin and copper
C. tin, antimony, copper
D. lead and zinc
E. lead and copper

Induction hardening is the process of_____________________?

A. hardening surface of workpiece to ob-tain hard and wear resistant surface
B. increasing hardness throughout
C. heating and cooling rapidly
D. inducing hardness by continuous process
E. hardening core

Process of austempering results in__________________?

A. formation of bainite structure
B. martenistic structure
C. carburised structure
D. lamellar layers of carbide distributed throughout the structure
E. relieving of stresses throughout a component

Hardness of martensite is about___________________?

A. RC 65
B. RC 57
C. RC 48
D. RC 80
E. RC 32

Materials after cold working are subjected to following process to relieve stresses__________________?

A. tempering
B. hot working
C. normalising
D. annealing
E. special heat treatment

Carbon in iron is an example of__________________?

A. intermetallic compounds
B. interstitial solid solution
C. substitutional solution
D. all of the above
E. none of the above.

Which is false statement about annealing. Annealing is done to________________?

A. improve machining characteristic
B. harden steel slightly
C. relieve stresses
D. soften material
E. permit further cold working

Hardness of lower bainite (tempered martensite) is about________________?

A. RC 48
B. RC 65
C. RC 57
D. RC 80
E. RC 32

Vanadium in high speed steels__________________?

A. provides high hot hardness
B. promotes decarburisation
C. forms very hard carbides and thus in-creases wear resistance
D. promotes retention of austenite
E. increases toughness

Which is false statement about tempering. Tempering is done to_______________?

A. improve machinability
B. improve toughness
C. improve ductility
D. release stresses
E. reduce hardness and brittleness

Which of the following is the binding material in cemented carbides___________________?

A. cobalt
B. vanadium
C. nickel
D. iron
E. carbon

Cemented carbide tools are not found to be suitable for cutting_______________?

A. cast iron
B. brass
C. aluminium
D. steel
E. non-ferrous alloys.

Chromium in steel_________________?

A. improves wear resistance, cutting ability and toughness
B. improves cutting ability and reduces hardenability
C. refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
D. gives ductility, toughness, tensile strength and anticorrosion properties
E. makes steel hard

Which is false statement about case hardening. Case hardening is done by_______________?

A. electroplating
B. induction hardening
C. cyaniding
D. nitriding
E. flame hardening

An example of amorphous material is____________?

A. lead
B. zinc
C. silver
D. glass
E. brass

Amorphous material is one___________________?

A. in which atoms align themselves in a geometric pattern upon solidification
B. in which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid
C. which emits fumes on melting
D. which is not attacked by phosphorous
E. none of the above

Which is false statement about normalizing. Normalizing is done to _________________?

A. reduce segregation in casting
B. refine grain structure
C. improve mechanical properties
D. induce stresses-
E. relieve internal stresses

Argentite is the principal ore or raw material for _________________?

A. tin
B. aluminium
C. zinc
D. lead
E. silver

Brass (alloy of copper and zinc) is an example of__________________?

A. substitutional solid solution
B. intermetallic compounds
C. interstitial solid solution
D. all of the above
E. none of the above

Hardness of upper bainite (acicular structure) is about___________________?

A. RC 57
B. RC 48
C. RC 65
D. RC 80
E. RC 32.

Weld decay is the phenomenon found with _________________?

A. mild steel
B. cast iron
C. non-ferrous materials
D. wrought iron
E. stainless steel

The surface hardness of the following order is achieved by nitriding operation__________________?

A. 1500 VPN
B. 600 VPN
C. 1000 to 1100 VPN
D. 250 VPN
E. 2000 VPN

The loss of strength in compression with simultaneous gain in strength in tension due to overloading is known as________________?

A. creep
B. hysteresis
C. visco elasticity
D. Boeschinger effect
E. inelasticity

Cyaniding is the process of________________?

A. reacting steel surface with cyanide salts
B. dipping steel in cyanide bath
C. adding carbon and nitrogen by heat treatment of steel to increase its surface hardness
D. obtaining cyanide salts
E. making corrosion resistant steel

By severely deforming a metal in a particular direction it becomes _________________?

A. malleable
B. ductile
C. homogeneous
D. isotropic
E. anisotropic

An engineer’s hammer is made of___________________?

A. forged steel
B. cast iron
C. mild steel
D. high carbon steel
E. H.S.S

Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is__________________?

A. duralumin
B. silver metal
C. Hastelloy
D. monel metal
E. invar

Basic constituents of Monel metal are _________________?

A. nickel, copper
B. zinc, tin, lead
C. nickel, molybdenum
D. nickel, lead and tin
E. none of the above

Eutectoid steel contains following percentage of carbon_______________?

A. 0.3%
B. 0.02%
C. 0.63%
D. 0.8%
E. 1.2%.

Pick up the wrong statement Nickel and chromium in steel help in _________________?

A. raising the elastic limit
B. improving machining properties
C. providing high strength at elevated temperatures
D. providing corrosion resistance
E. improving the resilience and ductility

Railway rails are normally made of_______________?

A. alloy steel
B. mild steel
C. high carbon
D. tungsten steel
E. cast iron steel

Corrosion resistance of steel is increased by addition of________________?

A. chromium and nickel
B. vanadium, aluminium
C. sulphur, phosphorus, lead
D. tungsten, molybdenum, vanadium, chromium
E. zinc

Maximum percentage of carbon in ferrite is___________________?

A. 0.025%
B. 0.1%
C. 0.06%
D. 0.25%
E. 0.8%.

The most effective inhibitor of grain growth, when added in small quantities is__________________?

A. manganese
B. vanadium
C. carbon
D. cobalt
E. copper

‘Killed steels’ are those steels__________________?

A. in which carbon is completely burnt
B. which after their destruction are recycled to produce fresh steel
C. which are deoxidised in the ladle with silicon and aluminium
D. which are destroyed by burning
E. which have poor properties due to improper manufacturing

Engineering Materials MCQs Latest – Competitive Mechanical Engineering MCQs

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