ME3I
22343
Multiple Choice Questions (MCQs)
1 Which of the following properties is impact strength indicative of?- (A) Elasticity
- (B) Hardness
- (C) Stiffness
- (D) Toughness
2 Which of the following relation is stated by Hooke’s law?
- (A) Stress is directly proportional to strain
- (B) Stress is inversely proportional to strain
- (C) Stress is directly proportional to square of strain
- (D) Stress is inversely proportional to square of strain
3 The slope of the stress-strain curve in the elastic deformation region is ____________
- (A) Elastic modulus
- (B) Plastic modulus
- (C) Poisson’s ratio
- (D) None of the mentioned
4 What is the stress-strain curve?
- (A) It is the percentage of stress and stain
- (B) It is the relationship between stress and strain
- (C) It is the difference between stress and strain
- (D) None of the mentioned
5 Which point on the stress strain curve occurs after the proportionality limit?
- (A) Upper yield point
- (B) Lower yield point
- (C) Elastic limit
- (D) Ultimate point
6 Elastic limit is the point ____________
- (A) up to which stress is proportional to strain
- (B) At which elongation takes place without application of additional load
- (C) Up to which if the load is removed, original volume and shapes are regained
- (D) None of the mentioned
7 Where is the necking region?
- (A) The area between lower yield point and upper yield point
- (B) The area between the plastic limit and elastic limit
- (C) The area between the ultimate point and initial point
- (D) The area between the ultimate point and rupture
8 What is the unit for stress?
- (A) N/m2
- (B) Nm2
- (C) N/m
- (D) Nm
9 Which of the following parameters can be obtained by tension test of a standard specimen?
- (A) Proportional Limit
- (B) Yield Strength
- (C) Percentage Reduction in area
- (D) All of the mentioned
10 Yield strength is defined as the maximum stress at which a marked increase in elongation occurs without increase in________
- (A) Load
- (B) Strength
- (C) Toughness
- (D) Hardness
11 Melting point of iron in degree centigrade is equal to
- (A) 768
- (B) 1535
- (C) 1410
- (D) 910
12 Iron carbon phase diagram is
- (A) Unary phase
- (B) Binary phase
- (C) Tertiary phase
- (D) None of the mentioned
13 Peritectic reaction in iron carbon diagram takes place at temperature (in degree centigrade) is
- (A) 1539
- (B) 1493
- (C) 910
- (D) 1175
14 Percentage of carbon at a eutectic point is equal to
- (A) 2.1
- (B) 4.3
- (C) 0.83
- (D) 0.02
15 What is pearlite?
- (A) layered structure composed of alternating layers of ferrite and cementite
- (B) eutectic mixture of austenite and cementite.
- (C) layered structure composed of alternating layers of austenite and cementite
- (D) ferrite and cementite
16 What is ledeburite?
- (A) layered structure composed of alternating layers of ferrite and cementite
- (B) eutectic mixture of austenite and cementite.
- (C) ferrite and cementite
- (D) All of the above
17 MPa is the unit of —–
- (A) Stress
- (B) Young’s modulus
- (C) Bulk modulus
- (D) All of the above
18 Amount of energy absorbed by the materials before fracture is called.
- (A) Hardness
- (B) Toughness
- (C) Resilience
- (D) Endurance limit
19 Identify the mechanical property from following options.
- (A) Luster
- (B) Structure
- (C) Creep
- (D) Thermal conductivity
20 Find the compound which follows BCC structure from following options.
- (A) Pb
- (B) Ag
- (C) Au
- (D) Mo
21 Solid solution alloy is a mixture of two solids in a single phase.
- (A) Reversible
- (B) Irreversible
- (C) Partially reversible
- (D) Partially irreversible
22 Molybdenum tool steels contain which of the following percentage of alloying elements?
- (A) 14-20%
- (B) 14-17%
- (C) 9-18%
- (D) 3-7%
23 Identify the correct alloying element which increases machining ability of steel.
- (A) Nickel
- (B) Tungsten
- (C) Phosphorous
- (D) Copper
24 —– is compound having fixed carbon content of 6.67%.
- (A) Austenite
- (B) Cementite
- (C) Ledeburite
- (D) Martensite
25 Percentage of carbon at eutectoid point is equal to —–
- (A) 2.1
- (B) 4.3
- (C) 0.83
- (D) 0.18
26 Which metal has white colour due to absence of ______.
- (A) Graphite
- (B) Silver
- (C) Duralumin
- (D) Mild steel
27 Vanadium steel is appropriate for manufacturing of which of the following items?
- (A) Nuts
- (B) Shafts
- (C) Axles
- (D) Levers
28 Mild steel is not used for manufacturing of _______.
- (A) Machine tool beds
- (B) Cam shafts
- (C) Nuts
- (D) Bolts
29 Compressibility is reciprocal of —–
- (A) Shear modulus
- (B) Bulk modulus
- (C) Young’s modulus
- (D) Modulus of rigidity
30 Area under stress-strain curve represents —–
- (A) Hardness
- (B) Brittleness
- (C) Toughness
- (D) Fatigue
31 Identify the correct number of atoms present in the SCC unit lattice.
- (A) 3
- (B) 4
- (C) 1
- (D) 5
32 Find the brittle material.
- (A) Glass
- (B) Diamond
- (C) Both a & b
- (D) Steel
33 Which property occurs in steel at higher temperature?
- (A) Fatigue
- (B) Creep
- (C) Resilience
- (D) Toughness
34 Identify the element which is not added in alloy steels?
- (A) Aluminium
- (B) Boron
- (C) Chromium
- (D) Sodium
35 Pearlite is an intimate mixture of ______ and cementite.
- (A) Austenite
- (B) Ferrite
- (C) Martensite
- (D) Ledeburite
36 A homogeneous physically distinct and mechanical separable part of the system under study is —–
- (A) Phase
- (B) Pure metal
- (C) Alloy
- (D) Solid solution
37 In which of the following reactions solid phase is converted into two or more solids?
- (A) Eutectic
- (B) Eutectoid
- (C) Peritectic
- (D) Isomorphous
38 Find the element which is produces hot hardness by forming carbides in high-speed steel?
- (A) Vanadium
- (B) Tungsten
- (C) Chromium
- (D) Nickel
39 Tool steel is not used for of metals.
- (A) Working
- (B) Shaping
- (C) Cutting
- (D) Forging
40 Which of the following expands on solidification?
- (A) High carbon steel
- (B) Low carbon steel
- (C) White cast iron
- (D) Grey cast iron
41 In grey cast iron greater part of carbon is in form of —–
- (A) Flakes
- (B) Nodules
- (C) Spheroids
- (D) Holes
42 —– cannot be machined.
- (A) White cast iron
- (B) Grey cast iron
- (C) Spheroidal cast iron
- (D) Malleable cast iron
43 Nodular cast iron has tensile strength of pascals.
- (A) 300
- (B) 330
- (C) 360
- (D) 390
44 —– is an alloy of iron and carbon containing more than 2% carbon.
- (A) Steels
- (B) Hypoeutectoid steels
- (C) Hypereutectoid
- (D) Cast iron
45 A material also celled as intelligent or responsive materials.
- (A) Smart materials
- (B) Ceramics
- (C) Composites
- (D) Nano materials
46 Brass is an alloy of ______.
- (A) Copper and zinc
- (B) Copper and tin
- (C) Copper and nickel
- (D) Copper and lead
47 Full form of PVC is ______.
- (A) Poly vinyl carbon
- (B) Poly vinex carbon
- (C) Poly vinyl chloride
- (D) Poly viscus carbon
48 Gray cast iron contains carbon in the form of graphite flakes.
- (A) TRUE
- (B) FALSE
- (C) Partially wrong
- (D) Can’t say
49 In general, the major classes of engineering materials are ______.
- (A) Metals, ceramics, and copper
- (B) Polymers. metals and composites
- (C) Steels, ceramics, polymer and aluminium
- (D) Metals. ceramics, polymers and composites
50 Melting point of copper is around _____.
- (A) 1083 degree Celsius
- (B) 983 degree Celsius
- (C) 1183 degree Celsius
- (D) 1283 degree Celsius
51 Pearlite is a ______ steel.
- (A) Eutectoid
- (B) Hyper Eutectoid
- (C) Hypo Eutectoid
- (D) Hyper Eutectic
52 Tempering requires heating hardened steel ________.
- (A) Below its upper critical temperature
- (B) Above its upper critical temperature
- (C) Below its lower critical temperature
- (D) Above its lower critical temperature
53 The slow and progressive deformation of a material with time at constant stress is called as _______.
- (A) Resilience
- (B) Creep
- (C) Fatigue
- (D) Elasticity
54 What is full form of HCHC.
- (A) High Cobalt High Chromium Steel
- (B) High carbon High Cobalt Steel
- (C) Heavy Carbon High Chromium Steel
- (D) High Carbon High Chromium Steel
55 A bearing material should not possess the characteristics of high ______.
- (A) Coefficient of friction
- (B) Hardness
- (C) Melting point
- (D) Thermal conductivity
56 An important characteristics of cast iron is _______.
- (A) Ductility
- (B) Elastic strength
- (C) Fatigue strength
- (D) Creep Strength
57 Ceramics having nuclear applications can be used as _______.
- (A) Moderators
- (B) Light weight
- (C) Melting material
- (D) Smart material
58 FG 400 means _______.
- (A) Gray cast iron with minimum tensile strength of 400 N/mm2
- (B) White cast iron with minimum tensile strength of 400 N/mm2
- (C) Nodular cast iron with minimum tensile strength of 400 N/mm2
- (D) Malleable cast iron with minimum tensile strength of 400 N/mm2
59 For hardening the tool made from high-speed steel, the quenching media used is _______.
- (A) Water
- (B) Brine solution
- (C) Salt
- (D) Oil
60 Match the correct percentage of carbon given in group – B for the type of material given in group – A.
| Group – A (Material) | Group – B (Carbon percentage) |
|---|---|
| a) Hypo – eutectoid steel | A) 4.3 – 6.67 |
| b) Hyper – eutectoid steel | B) 2.0 – 4.3 |
| c) Hypo – eutectoid cast iron | C) 0.8 – 2.0 |
| d) Hyper – eutectoid cast iron | D) 0.008 – 2.0 |
- (A) A, D, C, B
- (B) B, C, D, A
- (C) D, C, B, A
- (D) D, C, A, B
61 Red hardness of an alloy steel can be improved by adding _______.
- (A) Vanadium
- (B) Manganese
- (C) Titanium
- (D) Tungsten
62 The annealing heat treatment improves _______.
- (A) Grain size
- (B) Pig irons
- (C) Carbon content
- (D) Melting point
63 The material property which only depends on basic crystal structure is _______.
- (A) Elastic strength
- (B) Fatigue strength
- (C) Creep Strength
- (D) Fracture strength
64 Which of the following has a hexagonal close-packed crystal structure?
- (A) Silver
- (B) Iron
- (C) Magnesium
- (D) Aluminium
65 Which of the following is not a form of bronze?
- (A) Phosphorous bronze
- (B) Silicon bronze
- (C) Beryllium bronze
- (D) Arsenic bronze
66 Brinell hardness of gun metal is _______.
- (A) 55
- (B) 67
- (C) 62
- (D) 65
67 Porous self-lubricating bearing have sufficient porosity to hold upto of lubricating oil.
- (A) 35%
- (B) 37%
- (C) 39%
- (D) 40%
68 Nylons have good resistance to —–
- (A) Hot water
- (B) Alcohol
- (C) Ultra violet light
- (D) Abrasion
69 Piezoelectric material produces, when stress is applied.
- (A) Heat
- (B) Voltage
- (C) Strain
- (D) Light
70 Shape memory materials are also called as —–
- (A) Thermo responsive material
- (B) Pressure responsive material
- (C) Current responsive material
- (D) Voltage responsive material
71 PH sensitive material is used to indicate —–
- (A) Temperature level
- (B) Current level
- (C) Corrosion level
- (D) Resistance level
72 Quenching is not necessary when hardening is done by —–
- (A) Case hardening
- (B) Flame hardening
- (C) Nitriding
- (D) Carburizing
73 Maximum hardness is obtained in —–
- (A) Normalizing
- (B) Hardening
- (C) Annealing
- (D) Austempering
74 Coarse perlite is the product of process.
- (A) Normalizing
- (B) Hardening
- (C) Annealing
- (D) Martempering
75 The heat treatment process used for casting is —–
- (A) Normalizing
- (B) Carburizing
- (C) Annealing
- (D) Tempering
76 The cupola is used to manufacture —–
- (A) Pig iron
- (B) Cast iron
- (C) Wrought iron
- (D) Steel