MEM-22343 Question Bank
MCQ's
1. MPa is the unit of . [CO1]
(a) Stress
(b) Young’s modulus
(c) Bulk modulus
(d) All of the above
;Note: Answers are available at the end
2. Amount of energy absorbed by the materials before fracture is called. [CO1]
(a) Hardness (b) Toughness (c) Resilience (d) Endurance limit
3. Identify the mechanical property from following options. [CO1]
(a) Luster (b) Structure (c) Creep (d) Thermal conductivity
4. Find the compound which follows BCC structure from following options. [CO1]
(a) Pb (b) Ag (c) Au (d) Mo
5. Solid solution alloys is mixture of two solids in a single phase. [CO2]
(a) Reversible (b) Irreversible (c) Partially reversible (d) Partially irreversible
6. Molybdenum tool steels contain which of the following percentage of alloying elements?. [CO2]
(a) 14-20% (b) 14-17% (c) 9-18% (d) 3-7%
7. Identify the correct alloying element which increases machining ability of steel. [CO2]
(a) Nickel (b) Tungsten (c) Phosphorous (d) Copper
8. is compound having fixed carbon content of 6.67%. [CO2]
(a) Austenite (b) Cementite (c) Ledeburite (d) Martensite
9. Percentage of carbon at eutectoid point is equal to . [CO2]
(a) 2.1 (b) 4.3 (c) 0.83 (d) 0.18
10. Which metal has white colour due to absence of ______. [CO3]
(a) Graphite (b) Silver (c) Duralumin (d) Mild steel
11. Vanadium steel is appropriate for manufacturing of which of the following items?. [CO3]
(a) Nuts (b) Shafts (c) Axles (d) Levers
12. Mild steel is not used for manufacturing of _______. [CO3]
(a) Machine tool beds (b) Cam shafts (c) Nuts (d) Bolts
13. Compressibility is reciprocal of . [CO1]
(a) Shear modulus (b) Bulk modulus (c) Young’s modulus (d) Modulus of rigidity
14. Area under stress-strain curve represents . [CO1]
(a) Hardness (b) Brittleness (c) Toughness (d) Fatigue
15. Identify the correct number of atoms present in the SCC unit lattice. [CO1]
(a) 3 (b) 4 (c) 1 (d) 5
16. Atomic packing efficiency of FCC lattice is _______ . [CO1]
(a) 52% (b) 74% (c) 68% (d) 50%
17. Find the brittle material. [CO1]
(a) Glass (b) Diamond (c) Both a & b (d) Steel
18. Which property occurs in steel at higher temperature . [CO1]
(a) Fatigue (b) Creep (c) Resilience (d) Toughness
19. Identify the element which is not added in alloy steels?. [CO2]
(a) Aluminium (b) Boron (c) Chromium (d) Sodium
20. Pearlite is an intimate mixture of ______ and cementite. [CO2]
(a) Austenite (b) Ferrite (c) Martensite (d) Ledeburite
21 A homogeneous physically distinct and mechanical separable part of the system under study is . [CO2]
(a) Phase (b) Pure metal (c) Alloy (d) Solid solution
22. Identify the material which is not a pure metal?. [CO2]
(a) Aluminium (b) Copper (c) Brass (d) Silver
23. In which of the following reactions solid phase is converted into two or more solids?. [CO2]
(a) Eutectic (b) Eutectoid (c) Peritectic (d) Isomorphous
24. Find the element which is produces hot hardness by forming carbides in high speed steel?. [CO2]
(a) Vanadium (b) Tungsten (c) Chromium (d) Nickel
25. Tool steel is not used for of metals. [CO2]
(a) Working (b) Shaping (c) Cutting (d) Forging
26. Which of the following expands on solidification?. [C03]
(a) High carbon steel (b) Low carbon steel (c) White cast iron (d) Grey cast iron
27. In grey cast iron greater part of carbon is in form of . [CO3]
(a) Flakes (b) Nodules (c) Spheroids (d) Holes
28. cannot be machined. [CO3]
(a) White cast iron (b) Grey cast iron (c) Spheroidal cast iron (d) Malleable cast iron
29. Nodular cast iron has tensile strength of pascals. [CO3]
(a) 300 (b) 330 (c) 360 (d) 390
30. is an alloy of iron and carbon containing more than 2% carbon. [CO3]
(a) Steels (b) Hypoeutectoid steels (c) Hypereutectoid (d) Cast iron
31. A material also celled as intelligent or responsive materials. [CO5]
(a) Smart materials (b) Ceramics (c) Composites (d) Nano materials
32. Brass is an alloy of ______. [CO4]
(a) Copper and zinc (b) Copper and tin (c) Copper and nickel (d) Copper and lead
33. Full form of PVC is ______. [CO5]
(a) Poly vinyl carbon (b) Poly vinex carbon (c) Poly vinyl chloride (d) Poly viscus carbon
34. Gray cast iron contains carbon in the form of graphite flakes. [CO3]
(a) True (b) False (c) Partially wrong (d) Can’t say
35. In general, the major classes of engineering materials are ______. [CO1]
(a) Metals, ceramics, and copper (b) Polymers. metals and composites
(c) Steels, ceramics, polymer and aluminium (d) Metals. ceramics, polymers and composites
36. Melting point of copper is around _____. [CO4]
(a) 1083 degree Celsius (b) 983 degree Celsius (c) 1183 degree Celsius (d) 1283 degree Celsius
37. Pearlite is a ______ steel. [CO2]
(a) Eutectoid (b) Hyper Eutectoid (c) Hypo Eutectoid (d) Hyper Eutectic
38. Tempering requires heating hardened steel ________. [CO6]
(a) Below its upper critical temperature (b) Above its upper critical temperature
(c) Below its lower critical temperature (d) Above its lower critical temperature
39. The slow and progressive deformation of a material with time at constant stress is called as _______. [CO1]
(a) Resilience (b) Creep (c) Fatigue (d) Elasticity
40. What is full form of HCHC. [CO2]
(a) High Cobalt High Chromium Steel (b) High carbon High Cobalt Steel
(c) Heavy Carbon High Chromium Steel (d) High Carbon High Chromium Steel
41. A bearing material should not possess the characteristics of high ______. [CO4]
(a) Coefficient of friction (b) Hardness (c) Melting point (d) Thermal conductivity
42. An important characteristics of cast iron is _______. [CO3]
(a) Ductility (b) Elastic strength (c) Fatigue strength (d) Creep Strength
43. Ceramics having nuclear applications can be used as _______. [CO5]
(a) Moderators (b) Light weight (c) Melting material (d) Smart material
44. FG 400 means _______. [CO3]
(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
45. For hardening the tool made from high speed steel, the quenching media used is _______. [CO6]
(a) Water (b) Brine solution (c) Salt (d) Oil
46. Match the correct percentage of carbon given in group - B for the type of material given in group - A. [CO2]
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
47. Red hardness of an alloy steel can be improved by adding _______. [CO2]
(a) Vanadium (b) Manganese (c) Titanium (d) Tungsten
48. The annealing heat treatment improves _______. [CO6]
(a) Grain size (b) Pig irons (c) Carbon content (d) Melting point
49. The material property which only depends on basic crystal structure is _______. [CO1]
(a) Elastic strength (b) Fatigue strength (c) Creep Strength (d) Fracture strength
50. Which of the following has a hexagonal close-packed crystal structure?. [CO1]
(a) Silver (b) Iron (c) Magnesium (d) Aluminium51. Which of the following is not a form of bronze?. [C04]
(a) Phosphorous bronze (b) Silicon bronze (c) Beryllium bronze (d) Arsenic bronze
52. Brinell hardness of gun metal is _______. [C04]
(a) 55 (b) 67 (c) 62 (d) 65
53. Porous self-lubricating bearing have sufficient porosity to hold upto of lubricating oil. [C04]
(a) 35% (b) 37% (c) 39% (d) 40%
54. Nylons have good resistance to . [CO5]
(a) Hot water (b) Alcohol (c) Ultra violet light (d) Abrasion
55. Piezoelectric material produces , when stress is applied. [CO5]
(a) Heat (b) Voltage (c) Strain (d) Light
56. Shape memory materials are also called as . [CO5]
(a) Thermo responsive material (b) Pressure responsive material
(c) Current responsive material (d) Voltage responsive material
57. PH sensitive material is used to indicate . [CO5]
(a) Temperature level (b) Current level (c) Corrosion level (d) Resistance level
58. Quenching is not necessary when hardening is done by . [CO6]
(a) Case hardening (b) Flame hardening (c) Nitriding (d) Carburizing
59. Maximum hardness is obtained in . [CO6]
(a) Normalizing (b) Hardening (c) Annealing (d) Austempering
60. Coarse perlite is the product of process. [CO6]
(a) Normalizing (b) Hardening (c) Annealing (d) Martempering
61. The heat treatment process used for casting is . [CO6]
(a) Normalizing (b) Carburizing (c) Annealing (d) Tempering
62. The cupola is used to manufacture . [CO6]
(a) Pig iron (b) Cast iron (c) Wrought iron (d) Steel