SSC MTS - Engineering Materials 1000+ MCQ [Solved] PDF Download
Thursday 9th of March 2023
Sharing is caring
1. Shock resisting steels should have
A. Low wear resistance
B. Low hardness
C. Low tensile strength
D. Toughness
Answer : D
A. Low wear resistance
B. Low hardness
C. Low tensile strength
D. Toughness
Answer : D
2. According to Indian standard specifications, SG 400/15 means
A. Spheroidal graphite cast iron with B.H.N. 400 and minimum tensile strength 15 MPa
B. Spheroidal graphite cast iron with minimum tensile strength 400 MPa and 15 percent elongation
C. Spheroidal graphite cast iron with minimum compressive strength 400 MPa and 15 percent reduction in area
D. None of the above
Answer : B
A. Spheroidal graphite cast iron with B.H.N. 400 and minimum tensile strength 15 MPa
B. Spheroidal graphite cast iron with minimum tensile strength 400 MPa and 15 percent elongation
C. Spheroidal graphite cast iron with minimum compressive strength 400 MPa and 15 percent reduction in area
D. None of the above
Answer : B
3. Points of arrest for iron correspond to
A. Stages at which allotropic forms change
B. Stages at which further heating does not increase temperature for some time
C. Stages at which properties do not change with increase in temperature
D. There is nothing like points of arrest
Answer : A
A. Stages at which allotropic forms change
B. Stages at which further heating does not increase temperature for some time
C. Stages at which properties do not change with increase in temperature
D. There is nothing like points of arrest
Answer : A
4. The electric process of steel making is especially adapted to
A. Alloy and carbon tool steel
B. Magnet steel
C. High speed tool steel
D. All of these
Answer : D
A. Alloy and carbon tool steel
B. Magnet steel
C. High speed tool steel
D. All of these
Answer : D
5. The hardness of steel increases if it contains
A. Austenite
B. Martensite
C. Pearlite
D. Cementite
Answer : B
A. Austenite
B. Martensite
C. Pearlite
D. Cementite
Answer : B
6. In full annealing, the hypo eutectoid steel is heated from 30°C to 50°C above the upper critical temperature and then cooled
A. In still air
B. Slowly in the furnace
C. Suddenly in a suitable cooling medium
D. Any one of these
Answer : B
A. In still air
B. Slowly in the furnace
C. Suddenly in a suitable cooling medium
D. Any one of these
Answer : B
7. Preheating is essential in welding
A. Cast iron
B. High speed steel
C. All nonferrous materials
D. All of the above
Answer : A
A. Cast iron
B. High speed steel
C. All nonferrous materials
D. All of the above
Answer : A
8. Basic constituents of Monel metal are
A. Nickel, copper
B. Nickel, molybdenum
C. Zinc, tin, lead
D. Nickel, lead and tin
Answer : A
A. Nickel, copper
B. Nickel, molybdenum
C. Zinc, tin, lead
D. Nickel, lead and tin
Answer : A
9. The coordination number of a face centred cubic space lattice is
A. Six
B. Twelve
C. Eighteen
D. Twenty
Answer : B
A. Six
B. Twelve
C. Eighteen
D. Twenty
Answer : B
10. Cementite consist of
A. 13% carbon and 87% ferrite
B. 13% cementite and 87% ferrite
C. 13% ferrite and 87% cementite
D. 6.67% carbon and 93.33% iron
Answer : D
A. 13% carbon and 87% ferrite
B. 13% cementite and 87% ferrite
C. 13% ferrite and 87% cementite
D. 6.67% carbon and 93.33% iron
Answer : D
11. Carbon in iron is an example of
A. Substitutional solution
B. Interstitial solid solution
C. Intermetallic compounds
D. All of the above
Answer : B
A. Substitutional solution
B. Interstitial solid solution
C. Intermetallic compounds
D. All of the above
Answer : B
12. When low carbon steel is heated up to upper critical temperature
A. There is no change in grain size
B. The average grain size is a minimum
C. The grain size increases very rapidly
D. The grain size first increases and then decreases very rapidly
Answer : B
A. There is no change in grain size
B. The average grain size is a minimum
C. The grain size increases very rapidly
D. The grain size first increases and then decreases very rapidly
Answer : B
13. The alloying element which can replace tungsten in high speed steels is
A. Nickel
B. Vanadium
C. Cobalt
D. Molybdenum
Answer : D
A. Nickel
B. Vanadium
C. Cobalt
D. Molybdenum
Answer : D
14. Which of the following metal is used for nuclear energy?
A. Uranium
B. Thorium
C. Niobium
D. All of these
Answer : D
A. Uranium
B. Thorium
C. Niobium
D. All of these
Answer : D
15. The correct sequence for descending order of machinability is
A. Grey cast iron, low carbon steel, wrought iron
B. Low carbon steel, grey cast iron, wrought iron
C. Wrought iron, low carbon steel, grey cast iron
D. Wrought iron, grey cast iron, low carbon steel
Answer : A
A. Grey cast iron, low carbon steel, wrought iron
B. Low carbon steel, grey cast iron, wrought iron
C. Wrought iron, low carbon steel, grey cast iron
D. Wrought iron, grey cast iron, low carbon steel
Answer : A
16. Smelting is the process of
A. Removing the impurities like clay, sand etc. from the iron ore by washing with water
B. Expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns
C. Reducing the ore with carbon in the presence of a flux
D. All of the above
Answer : C
A. Removing the impurities like clay, sand etc. from the iron ore by washing with water
B. Expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns
C. Reducing the ore with carbon in the presence of a flux
D. All of the above
Answer : C
17. The tensile strength of wrought iron is maximum
A. Along the lines of slag distribution
B. Perpendicular to lines of slag distribution
C. Uniform in all directions
D. None of the above
Answer : A
A. Along the lines of slag distribution
B. Perpendicular to lines of slag distribution
C. Uniform in all directions
D. None of the above
Answer : A
18. Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio
A. 50 : 20 : 20 : 10
B. 40 : 30 : 20 : 10
C. 50 : 20 : 10 : 20
D. 30 : 20 : 30 : 20
Answer : A
A. 50 : 20 : 20 : 10
B. 40 : 30 : 20 : 10
C. 50 : 20 : 10 : 20
D. 30 : 20 : 30 : 20
Answer : A
19. The silicon steel is widely used for
A. Connecting rods
B. Cutting tools
C. Generators and transformers in the form of laminated cores
D. Motor car crankshafts
Answer : C
A. Connecting rods
B. Cutting tools
C. Generators and transformers in the form of laminated cores
D. Motor car crankshafts
Answer : C
20. Steel contains
A. 80% or more iron
B. 50% or more iron
C. Alloying elements like chromium, tungsten nickel and copper
D. Elements like phosphorus, sulphur and silicon in varying quantities
Answer : B
A. 80% or more iron
B. 50% or more iron
C. Alloying elements like chromium, tungsten nickel and copper
D. Elements like phosphorus, sulphur and silicon in varying quantities
Answer : B
21. Blast furnace is used to produce
A. Pig iron
B. Cast iron
C. Wrought iron
D. Steel
Answer : A
A. Pig iron
B. Cast iron
C. Wrought iron
D. Steel
Answer : A
22. The property of a material essential for spring materials is
A. Stiffness
B. Ductility
C. Resilience
D. Plasticity
Answer : C
A. Stiffness
B. Ductility
C. Resilience
D. Plasticity
Answer : C
23. Permalloy is a
A. Kind of stainless steel
B. None ferrous alloy
C. Polymer
D. Nickel and iron alloy having high permeability
Answer : D
A. Kind of stainless steel
B. None ferrous alloy
C. Polymer
D. Nickel and iron alloy having high permeability
Answer : D
24. Combined carbon in iron makes the metal
A. Soft and gives coarse grained crystalline structure
B. Soft and gives a fine grained crystalline structure
C. Hard and gives a coarse grained crystalline structure
D. Hard and gives a fine grained crystalline structure
Answer : D
A. Soft and gives coarse grained crystalline structure
B. Soft and gives a fine grained crystalline structure
C. Hard and gives a coarse grained crystalline structure
D. Hard and gives a fine grained crystalline structure
Answer : D
25. The lower critical temperature
A. Decreases as the carbon content in steel increases
B. Increases as the carbon content in steel increases
C. Is same for all steels
D. Depends upon the rate of heating
Answer : C
A. Decreases as the carbon content in steel increases
B. Increases as the carbon content in steel increases
C. Is same for all steels
D. Depends upon the rate of heating
Answer : C
26. Duralumin contains
A. 3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium
B. 3.5 to 4.5% copper, 1.2 to 1.7% manganese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium
C. 4 to 4.5% magnesium, 3 to 4% copper and rest aluminium
D. 5 to 6% tin, 2 to 3% copper and rest aluminium
Answer : A
A. 3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium
B. 3.5 to 4.5% copper, 1.2 to 1.7% manganese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium
C. 4 to 4.5% magnesium, 3 to 4% copper and rest aluminium
D. 5 to 6% tin, 2 to 3% copper and rest aluminium
Answer : A
27. Which is false statement about case hardening? Case hardening is done by
A. Electroplating
B. Cyaniding
C. Induction hardening
D. Nitriding
Answer : A
A. Electroplating
B. Cyaniding
C. Induction hardening
D. Nitriding
Answer : A
28. Drop forging dies contain carbon of the order of
A. 0.1 to 0.2 %
B. 0.25 to 0.5 %
C. 0.6 to 0.7 %
D. 0.7 to 0.9 %
Answer : C
A. 0.1 to 0.2 %
B. 0.25 to 0.5 %
C. 0.6 to 0.7 %
D. 0.7 to 0.9 %
Answer : C
29. According to Indian standard specifications, plain carbon steel designated by 40 C8 means that the carbon content is
A. 0.04 %
B. 0.35 to 0.45 %
C. 0.4 to 0.6 %
D. 0.6 to 0.8 %
Answer : B
A. 0.04 %
B. 0.35 to 0.45 %
C. 0.4 to 0.6 %
D. 0.6 to 0.8 %
Answer : B
30. Which of the following is the binding material in cemented carbides?
A. Cobalt
B. Nickel
C. Vanadium
D. Iron
Answer : A
A. Cobalt
B. Nickel
C. Vanadium
D. Iron
Answer : A
31. The ability of a material to absorb energy in the plastic range is called
A. Resilience
B. Creep
C. Fatigue strength
D. Toughness
Answer : A
A. Resilience
B. Creep
C. Fatigue strength
D. Toughness
Answer : A
32. In process annealing, the hypo eutectoid steel is
A. Heated from 30°C to 50°C above the upper critical temperature and then cooled in still air
B. Heated from 30°C to 50°C above the upper critical temperature and then cooled suddenly in a suitable cooling medium
C. Heated from 30°C to 50°C above the upper critical temperature and then cooled slowly in the furnace
D. Heated below or closes to the lower critical temperature and then cooled slowly
Answer : D
A. Heated from 30°C to 50°C above the upper critical temperature and then cooled in still air
B. Heated from 30°C to 50°C above the upper critical temperature and then cooled suddenly in a suitable cooling medium
C. Heated from 30°C to 50°C above the upper critical temperature and then cooled slowly in the furnace
D. Heated below or closes to the lower critical temperature and then cooled slowly
Answer : D
33. Corundum contains more than 95%
A. Steel
B. Al2O3
C. SiO2
D. MgO
Answer : B
A. Steel
B. Al2O3
C. SiO2
D. MgO
Answer : B
34. Bell metal contains
A. 70% copper and 30% zinc
B. 90% copper and 10% ti
C. 85 - 92% copper and rest tin with little lead and nickel
D. 70 - 75% copper and rest tin
Answer : D
A. 70% copper and 30% zinc
B. 90% copper and 10% ti
C. 85 - 92% copper and rest tin with little lead and nickel
D. 70 - 75% copper and rest tin
Answer : D
35. The ability of a material to resist softening at high temperature is known as
A. Creep
B. Hot tempering
C. Hot hardness
D. Fatigue
Answer : C
A. Creep
B. Hot tempering
C. Hot hardness
D. Fatigue
Answer : C
36. Eutectoid reaction occurs at
A. 600°C
B. 723°C
C. 1147°C
D. 1493°C
Answer : B
A. 600°C
B. 723°C
C. 1147°C
D. 1493°C
Answer : B
37. Cobalt in steel
A. Improves wear resistance, cutting ability and toughness
B. Refines grain size and produces less tendency to carburisation, improve corrosion and heat resistant proper ties
C. Improves cutting ability and reduce hardenability
D. Gives ductility, toughness, tensile strength and anti corrosion property
Answer : C
A. Improves wear resistance, cutting ability and toughness
B. Refines grain size and produces less tendency to carburisation, improve corrosion and heat resistant proper ties
C. Improves cutting ability and reduce hardenability
D. Gives ductility, toughness, tensile strength and anti corrosion property
Answer : C
38. Which is false statement about annealing? Annealing is done to
A. Relieve stresses
B. Harden steel slightly
C. Improve machining characteristic
D. Soften material
Answer : B
A. Relieve stresses
B. Harden steel slightly
C. Improve machining characteristic
D. Soften material
Answer : B
39. Y-alloy contains
A. 3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium
B. 3.5 to 4.5% copper, 1.2 to 1.7% manganese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium
C. 4 to 4.5% magnesium, 3 to 4% copper and rest aluminium
D. 5 to 6% tin, 2 to 3% copper and rest aluminium
Answer : B
A. 3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium
B. 3.5 to 4.5% copper, 1.2 to 1.7% manganese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium
C. 4 to 4.5% magnesium, 3 to 4% copper and rest aluminium
D. 5 to 6% tin, 2 to 3% copper and rest aluminium
Answer : B
40. Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?
A. Babbitt metal
B. Monel metal
C. Nichrome
D. Phosphor bronze
Answer : C
A. Babbitt metal
B. Monel metal
C. Nichrome
D. Phosphor bronze
Answer : C
41. Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio
A. 50 : 50
B. 30 : 70
C. 70 : 30
D. 40 : 60
Answer : B
A. 50 : 50
B. 30 : 70
C. 70 : 30
D. 40 : 60
Answer : B
42. Maximum percentage of carbon in ferrite is
A. 0.025 %
B. 0.06 %
C. 0.1 %
D. 0.25 %
Answer : A
A. 0.025 %
B. 0.06 %
C. 0.1 %
D. 0.25 %
Answer : A
43. Argentite is the principal ore or raw material for
A. Aluminium
B. Tin
C. Zinc
D. Silver
Answer : D
A. Aluminium
B. Tin
C. Zinc
D. Silver
Answer : D
44. A material is known as allotropic or polymorphic if it
A. Has a fixed structure under all conditions
B. Exists in several crystal forms at different temperatures
C. Responds to heat treatment
D. Has its atoms distributed in a random pattern
Answer : B
A. Has a fixed structure under all conditions
B. Exists in several crystal forms at different temperatures
C. Responds to heat treatment
D. Has its atoms distributed in a random pattern
Answer : B
45. The purpose of heat treatment is to
A. Relieve the stresses set up in the material after hot or cold working
B. Modify the structure of the material
C. Change grain size
D. Any one of these
Answer : D
A. Relieve the stresses set up in the material after hot or cold working
B. Modify the structure of the material
C. Change grain size
D. Any one of these
Answer : D
46. German silver contains
A. 1% silver
B. 2% silver
C. 5% silver
D. No silver
Answer : D
A. 1% silver
B. 2% silver
C. 5% silver
D. No silver
Answer : D
47. An alloy of copper, tin and zinc is known as
A. Brass
B. Bronze
C. Gun metal
D. Muntz metal
Answer : C
A. Brass
B. Bronze
C. Gun metal
D. Muntz metal
Answer : C
48. There are fourteen atoms in a unit cell of
A. Body centred cubic space lattice
B. Face centred cubic space lattice
C. Close packed hexagonal space lattice
D. None of these
Answer : B
A. Body centred cubic space lattice
B. Face centred cubic space lattice
C. Close packed hexagonal space lattice
D. None of these
Answer : B
49. Beryllium bronze has
A. High yield point
B. High fatigue limit
C. Both (A) and (B)
D. None of these
Answer : C
A. High yield point
B. High fatigue limit
C. Both (A) and (B)
D. None of these
Answer : C
50. Which one of the following metals would work-harden more quickly than the others?
A. Copper
B. Brass
C. Lead
D. Silver
Answer : B
A. Copper
B. Brass
C. Lead
D. Silver
Answer : B
Sharing is caring
Related Post
1000+ Visual Basic .NET MCQ for JEE Main [Solved]
SSC Stenographer - Microsoft PowerPoint 1000+ MCQ [Solved] PDF Download
C++ Programming MCQ Solved Paper for RBI Assistant
SSC Stenographer - Indian Polity & Economy 1000+ MCQ [Solved] PDF Download
1000+ Cell - the unit of life Multiple Choice Question Answer [Solved]
Networking 1000+ MCQ with answer for UPSC CDS