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This set of Engineering Materials Multiple Choice Questions & Answers (MCQs) focuses on Engineering Materials Set 17
Q1 | Which of the following is used for imitation jewellery?
- Aluminium bronze
- Silicon bronze
- Gun metal
- Babbit alloy
- Duralumin
Q2 | The modulus of elasticity E, the modulus of rigidity C, and Poisson's ratio are related by the equation
- E = G (1+ 2
- E = 2G (1 - 2
- E = 2G (1 -
- E = G (2 +
- E = 2G (1 +
Q3 | Cyaniding is the process of
- Adding carbon and nitrogen to increase hardness of specimen uniformly
- Adding carbon and nitrogen to increase hardness at the surface
- Adding carbon steel
- Adding carbon and nitrogen to increase hardness of core
- Creating a layer on the surface to impart the property of wear resistance
Q4 | Which of the following can have positive or negative charge?
- Neutron
- Isotope
- Hole
- Electron
- Iron
Q5 | Which of the following material has lowest specific gravity?
- Aluminium
- Brass
- Copper
- High carbon steel
- Zinc
Q6 | The cast iron has
- High ductility
- High malleability
- High tensile strength
- Elastic limit close to ultimate breaking strength
- None of the above
Q7 | Blisters in wrought iron cause
- Brittleness at high temperatures
- Brittleness at low temperatures
- Loose textured metal
- Voids created due to chemical reaction between carbon and iron oxide
- None of the above
Q8 | Limestone is added in blast furnace to flux
- Silicon xoide
- Carbon
- MnO2
- Sulphur
- None of the above
Q9 | Ligancy is
- the number of atoms (or ions) surrounding and touching a central atom
- a covalent bond between two atoms
- the angle betweent he two closest directional bond of an atom
- None of the above
- None of the above
Q10 | The moisture content in a well seasoned timber is
- 4 to 6 percent
- 6 to 8 percent
- 10 to 15 percent
- 20 to 25 percent
- None of the above
Q11 | The product of a cupola known as
- Malleable iron
- Steel
- Pig iron
- Cast iron
- Cast steel
Q12 | The process of production of articles having a soft ductile interior and a very hard surface, is known as
- Hardening
- Hardening and tempering
- Case hardening
- Hardening and annealing
- None of the above
Q13 | The blast furnace uses the following as fuel
- Blast furnace gas
- Cooking coal
- Producer gas
- Coke
- Coal
Q14 | If steel is cooled in still air, the structure obtained is
- Acicular
- Pearlite
- Martensite
- Sorbite
- Troosite
Q15 | In reinforced conccrete, steel rods are used to increase
- Tensile strength
- Compressive strength
- Shear strength
- None of the above
- Semi-conductors
Q16 | Lime stone acts as a flux in a cupola. It is generally added in the proportion
- 30 kg of limestone per tonner of iron
- One tonne of limestone per tonne of charge
- 10 kg of limestone per tonne of iron
- 500 kg of limestone per tonne of coke
- 100 kg of limestone per tonne of iron
Q17 | Identify the correct statement
- A metal which is brittle in tension may be ductile under hydrostatic compression
- All materials undergo plastic deformation
- In elastic materials yield stress and tensile strength are practically identical
- A completely brittle material would not fracture at elastic limit
- Brittleness is an important engineering consideration, because it allows the materials to redistribute localized stresses