Engineering Materials MCQs Latest – MCQs Competitive Mechanical Engineering

Engineering Materials MCQs Latest – MCQs Competitive Mechanical Engineering

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:

Tungsten in steel________________?

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

Malleable cast iron _________________?

A. is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
B. contains l.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron
C. is produced by annealing process. It is soft, tough, and easily machined metal
D. is produced by small additions of magnesium (or cerium) in the ladle. Graphite is in the nodular or spheroidal form and is well dispersed throughout the material
E. none of the above

The hardness of steel primarily depends on _____________________?

A. %age of alloying elements
B. %age of carbon
C. heat treatment employed
D. method of manufacture
E. shape of carbides and their distribution in iron

The composition of silver solder is ___________________?

A. silver, copper, zinc
B. silver, lead, zinc
C. silver, tin, nickel
D. silver, copper, aluminium
E. silver, lead, tin

Which one of the following metals would work-harden more quickly than the others__________________?

A. lead
B. brass
C. copper
D. silver
E. aluminium

Steel made from phosphatic iron is_________________?

A. brittle
B. ductile
C. hard
D. tough
E. malleable

Brass contains___________________?

A. 70% copper and 30% zinc
B. 70-75% copper and rest tin
C. 85-92% copper and rest tin with little lead and nickel
D. 90% copper and 10% tin
E. 70% copper and 30% tin

A specimen of aluminium metal when observed under microscope shows __________________?

A. H.C.P. structure
B. F.C.C. crystal structure
C. B.C.C. crystalline structure
D. a complex cubic structure
E. orthorhombic crystalline structure

The crystal structure of brass is_________________?

A. F.C.C.
B. H.C.P.
C. B.C.C.
D. Orthorhombic crystalline structure
E. none of the above

The usual composition of a soldering alloy is__________________?

A. tin, lead and small percentage of antimony
B. tin, lead and silver
C. tin and lead
D. tin and copper
E. tin, copper and lead

Corrosion resistance of steel is increased by adding__________________?

A. chromium and nickel
B. aluminium and zinc
C. nickel and molybdenum
D. tungsten and sulfur
E. none of the above

Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio _____________________?

A. 50 : 20 : 20 : 10
B. 50 : 20 : 10 : 20
C. 40 : 30 : 20 : 10
D. 30 : 20 : 30 : 20
E. 50 : 10 : 20 : 20

Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio_________________?

A. 70 : 30
B. 30 : 70
C. 50 : 50
D. 40 : 60
E. 60 : 40

Ductile cast iron___________________?

A. is produced by annealing process. It is soft, tough and easily machined metal
B. is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
C. contains 1.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron
D. is produced by small additions of magnesium (or creium) in the ladle. Graphite is in nodular or spheroidal form and is well dispersed throughout the material
E. none of the above

Hydraulic Machine Mcqs – Mechanical Engineering

Corrundum contains more than 95% _____________________?

A. Si02
B. A1203
C. steel
D. MgO
E. german silver

If a refractory contains high content of silicon, it means refractory is__________________?

A. basic
B. acidic
C. neutral
D. brittle
E. none of the above

Which of the following is used for bearing liner_______________?

A. bronze
B. gun metal
C. bell metal
D. babbit metal
E. brass

Structural steel contains following principal alloying elements__________________?

A. nickel, chromium and manganese
B. tungsten, molybdenum and phosphorous
C. zinc, sulphur, and chromium
D. lead, tin, aluminium
E. none of the above

Bronze contains_____________________?

A. 70-75% copper and rest tin
B. 90% copper and 10% tin
C. 85-92% copper and rest tin with little lead and nickel
D. 70% copper and 30% zinc
E. 90% copper and 10% zinc

Gun metal contains__________________?

A. 90% copper and 10% tin
B. 70% copper and 30% zinc
C. 85-92% copper and rest tin with little lead and nickel
D. 70-78% copper and rest tin
E. 85-92% copper and rest zinc

The alloy used for making electrical resistances and heating elements is____________________?

A. nichrome
B. magnin
C. invar
D. elinvar
E. peiminvar

Permalloy is a___________________?

A. none ferrous alloy
B. kind of stainless steel
C. polymer
D. cutting tool material
E. nickel and iron alloy having high permeability

Free cutting steels_____________________?

A. are used where ease in machining is the criterion
B. require least cutting force
C. contain carbon in free form
D. do not exist
E. can be cut freely even under adverse conditions

Admiralty gun metal contains__________________?

A. alloy of tin, lead and cadmium
B. 88% copper, 10% tin and rest zinc
C. 63 to 67% nickel and 30% copper
D. iron scrap and zinc
E. none of the above

Which is false statement about properties of aluminium ___________________?

A. modulus of elasticity is fairly low
B. wear resistance is very good
C. corrosion resistance is good
D. creep strength limits its use to fairly low temperatures
E. fatigue strength is not high

Addition of manganese to aluminium results in__________________?

A. improving machinability
B. improvement of corrosion resistance
C. one of the best known age and precipitation-hardening systems
D. improvement of casting characteristics
E. none of the above

Which of the following alloys does not have copper as one of the constituents________________?

A. monel metal
B. delta metal
C. constantan
D. nichrome
E. silicon bronze

Addition of silicon to aluminium results in____________________?

A. improvement of casting characteristics
B. improving machinability
C. one of the best known age and precipitation-hardening systems
D. improvement of corrosion resistance
E. none of the above

White metal contains__________________?

A. 63 to 67% nickel and 30% copper
B. silver and chromium
C. alloy of tin, lead and cadmium
D. 88% copper and 10% tin and rest zinc
E. malleable cast iron and silver

Which of the following has highest specific strength of all structural materials__________________?

A. chromium alloys
B. titanium alloys
C. magnesium alloys
D. magnetic steel alloys
E. none of the above

Foundry crucible is made of_________________?

A. german silver
B. mild steel
C. lead
D. cast iron
E. graphite

Aluminium bronze contains__________________?

A. 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
B. 10% aluminium and 90% tin
C. 10% aluminium and 90% copper
D. 90% magnesium and 9% aluminium with some copper
E. 92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg

The correct composition of Babbit metal is__________________?

A. 87.75% Sn, 4% Cu, 8% Sb, 0.25% Bi
B. 87% Sn, 4% Cu, 8% Sb, 1% Al
C. 90% Sn, 2% Cu, 4% Sb, 2% Bi, 2% Mg
D. 82% Sn, 4% Cu, 8% Sb, 3% Al, 3% Mg
E. none of the above

Engineering Materials Mcqs

Neutral solution is one which has pH value__________________?

A. less than 7
B. greater than 7
C. equal to 7
D. pH value has nothing to do with neutral solution
E. none of the above

Basic solution is one which has pH value___________________?

A. greater than 7
B. less than 7
C. equal to 7
D. pH value has nothing to do with basic solution
E. none of the above

Recrystallisation temperature can belowered by_________________?

A. grain refinement
B. purification of metal
C. working at lower temperature
D. all of the above
E. none of the above

Austenite is a combination of_________________?

A. ferrite and austenite
B. cementite and gamma iron
C. ferrite and cementite
D. ferrite and iron graphite
E. pearlite and ferrite

Lead is poured into the joint between two pipes. These pipes may be made of____________________?

A. cast iron
B. asbestos cement
C. vitrified clay
D. concrete
E. mild steel

Pearlite is a combination of___________________?

A. ferrite and cementite
B. ferrite and austenite
C. cementite and gamma iron
D. ferrite and iron graphite
E. pearlite and ferrite

The transistor is made of___________________?

A. gold
B. silver
C. copper
D. germanium
E. german silver

Following elements have face-centred cubic structure__________________?

A. gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt
B. a iron (below 910°C and between 1400 to 1539°C), W
C. Mg, Zn, Ti, Zr, Br, Cd
D. all of the above
E. none of the above

Acidic solution is one which has pH value__________________?

A. equal to 7
B. less than 7
C. greater than 7
D. pH value has nothing to do with neutral solution
E. none of the above

Babbit metal is a_________________?

A. copper base alloy
B. tin base alloy
C. lead base alloy
D. all of the above
E. A. and C. above

Age-hardening is related with______________?

A. gun metal
B. stainless steel
C. german silver
D. duralumin
E. cast iron

Dow metal contains____________________?

A. 90% aluminium and 90% copper
B. 92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg
C. 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
D. 90% magnesium and 9% aluminium with some copper
E. 90% magnesium and 10% tin

German silver contains_________________?

A. 2.5% silver
B. 1% silver
C. 5% silver
D. 10% silver
E. 100% silver

Constantant an alloy used in thermocouples is an alloy of __________________?

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

Addition of lead and bismuth to aluminium results in_________________?

A. improvement of corrosion resistance
B. improvement of casting characteristics
C. one of the best known age and precipitation-hardening systems
D. improving machinability
E. none of the above

Elinvar, an alloy used in precision instruments, hair springs for watches, etc. contains the following element as principal alloying element__________________?

A. copper
B. iron
C. aluminium
D. zinc
E. nickel

Addition of copper to aluminium results in_____________________?

A. improvement of corrosion resistance
B. improvement of casting characteristics
C. one of the best known age and precipitation-hardening systems
D. improving machinability
E. none of the above

Which of the following alloys does not contain tin_________________?

A. white metal
B. fusible metal
C. solder admiralty
D. phosphor bronze
E. gun metal

Engineering Materials Mcqs

Delta metal is an alloy of__________________?

A. copper, zinc and iron
B. iron, lead and tin
C. iron, nickel and copper
D. iron, aluminium and magnesium
E. copper, zinc and antimony

Phosphor bronze contains____________________?

A. 1% phosphorous
B. 0.5% of phosphorous
C. 2.5% phosphorous
D. 5% phosphorous
E. none of the above

DuraJomin contains___________________?

A. 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
B. 92.5% aluminium, 40% copper, 2% nickel, and 1.5% Mg
C. 94% aluminium and 6% tin
D. 90% magnesium and 9% aluminium with some copper
E. 10% aluminium and 90% copper

Monel metal contains_________________?

A. 63 to 67% nickel and 30% copper
B. alloy of tin, lead and cadmium
C. 88% copper and 10% tin and rest zinc
D. malleable iron and zinc
E. none of the above

Perminvar alloy having constant permeability is an alloy of________________?

A. nickel, copper and iron
B. copper, nickel and antimony
C. nickel, copper and zinc
D. iron, zinc and bismuth
E. antimony, copper and zinc

Muntz metal contains copper and zinc in the ratio of________________?

A. 40 : 60
B. 50 : 50
C. 60 : 40
D. 20 : 80
E. 80 : 20

Aluminium bronze contains aluminium and copper in the ratio of___________________?

A. 40 : 60
B. 50 : 50
C. 60 : 40
D. 10 : 90
E. 90 : 10

The correct sequence for descending order of machinability is _____________________?

A. grey cast iron, low carbon steel, wrought iron
B. wrought iron,low carbon steel, grey cast iron
C. low carbon steel, grey cast iron, wrought iron
D. wrought iron, grey cast iron, low carbon steel
E. grey cast iron, wrought iron, low carbon steel

Bell metal contains_____________________?

A. 90% copper and 10% tin
B. 70% copper and 30% zinc
C. 85-92% copper and rest tin with little lead and nickel
D. 70-75% copper and rest tin
E. 70-75% copper and rest zinc and tin

Pick up the wrong statement?

A. aluminium in steel results in excessive grain growth
B. nickel and chromium in steel help in raising the elastic limit and improve the resilience and ductility
C. manganese in steel induces hardness
D. tungsten in steels improves magnetic properties and hardenability
E. sulphur, phosphorous and lead im¬prove machining properties of steel

Engineering Materials MCQs Latest – MCQs Competitive Mechanical Engineering

Leave a Reply

error:
%d bloggers like this: