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This set of Engineering Materials Multiple Choice Questions & Answers (MCQs) focuses on Engineering Materials Set 6
Q1 | Cold work is done on the metal
- Below the thermal critical range
- Above the thermal critical range
- At zero degree centigrade temperature
- After slightly warning the metal in furnace
- None of the above
Q2 | Which of the following timber is used for sports goods?
- Mulberry
- Mahogany
- Sal
- Deodar
- None of the above
Q3 | The statement that, at equilibrium, the number of phases plus the degrees of freedom must equal the number of components plus two is known as
- Gibbs phase rule
- Lever rule
- Fick's rule
- Heisenberg rule
- None of the above
Q4 | Steel balls for ball bearings are hardened to
- 100 VPN
- 400-700 VPN
- 700-800 VPN
- 150-200 VPN
- 200-400 VPN
Q5 | Muntz metal contains
- Copper-tin
- Copper-chromium
- Copper-nickel
- Copper-zinc
- Copper-alminium
Q6 | Corrosion is a destructive attack on metals
- Which may be chemical or electrochemical in nature
- Which is basically caused by atmospheric air
- Which is caused by contact with other metals
- At high temperature
- None of the above
Q7 | The depth hardness of steel increases by the addition of
- Silicon
- Nickel
- Manganese
- Sulphur
- Chromium
Q8 | Dielectric strength of a material is
- Capacity to withstand high voltage
- Magnetic property
- Energy storage capacity
- Capacity to resist flow of current
- Capacity to take two stresses
Q9 | The presence of sulphur in pig iron makes
- Its casting unsound
- It malleable
- It brittle
- It hard
- It machinable
Q10 | Shot blasting is the process for the cleaning of
- Pattern
- Cores
- Moulding sand
- Welded components
- Castings
Q11 | The process of zinc coating used extensively for protecting steel from atmospheric deterioration is known as
- Anodizing
- Colourizing
- Pakerizing
- Galvanizing
- None of the above
Q12 | The process of producing parts by electrolytic deposition of metal upon a conductive removable mould or matrix is known as
- Plating
- Deposition
- Electro-moulding
- Electrolysis
- Electro forming
Q13 | Some engineering materials are made up of more than one phase, with different mechanical properties, such materials are known as
- Discontinuous
- Brittle
- Plastic
- Heterogeneous
- None of the above
Q14 | Chromium when added as an alloying element to steels
- Increases corrosion resistance
- Increases red hardness
- Refines the grain structure
- Improves mechanical properties
- Softens the material
Q15 | The essential gradient of any hardened steel is
- Martensite
- Cementite
- Pearlite
- Carbon
- Austenite
Q16 | Which type of thermostat is generally used in applicances with heating elements?
- Bimetallic
- Magnetic
- Clad metal
- Ferromagenetic
- None of the above
Q17 | In order to measure/detect materials by non-destructive testing the method generally used is
- Mossbanser effect
- Thermochemic point
- Infrared radiometer
- Liquid crystallography
- Acoustic emission
Q18 | The defect blow hole in castings is caused due to
- Hard ramming
- Excessive moisture
- Improper venting
- Excessive carbouacious material
- Any of the above
Q19 | Spring steels should have high resistance to
- Shocks
- Fatigue
- Corrosion
- Deformation
- All of the above
Q20 | The specific gravity of cast iron is closer to
- 11
- 9
- 7
- 5
- 3
Q21 | The theory of failure generally applied in case of brittle materials is
- Maximum shear stress theory
- Maximum principal stress theory
- Theory of superposition
- Maximum strain energy theory
- Maximum shear strain energy theory
Q22 | All of the following are destructive tests on materials EXCEPT
- Charpy test
- Tensile test
- Cupping test
- Fatigue test
- Shore's scleroscope hardness test
Q23 | If steel is quenched in oil the structure obtained is
- Acicular
- Troosite
- Pearlite
- Sorbite
- Martensite
Q24 | Which of the following is p-type semi-conductor?
- Selenium
- Silicon doped with phosphorous
- Silicon doped with gallium
- All of the above
- None of the above
Q25 | The amount of energy expended by the action of external force in deforming an elastic body is known as
- Elastic energy
- Deformation energy
- Strain energy
- Work done
- Potential energy