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This set of Engineering Materials Multiple Choice Questions & Answers (MCQs) focuses on Engineering Materials Set 1
Q1 | The ability of material to absorb a large amount of energy is
- Malleability
- Resilience
- Toughness
- Ductility
- Hardness
Q2 | Porous materials generally
- Transmit sound
- Isentropic material
- Absorb most of the sound
- Reflect entire sound
Q3 | A body which does not contain voids or empty spaces is known as
- Continuous body
- An isotropic body
- Heterogeneous body
- Crystalline body
- None of the above
Q4 | Standards used in USSR are known as
- CSN
- AENOR
- GOST
- UNI
- JIS
Q5 | A non-crystalline polymer which can be stretched to more than twice its original length and which contracts quickly on releasing the load, is known as
- copolymer
- dilatant
- plastic
- elastomer
- None of the above
Q6 | For better fuuidity of the molten metal, the following is added in blast furnace
- Line
- Carbon
- Sulphur
- Manganese
- Oil
Q7 | Lead is used for joining pipes made of
- Cast iron
- Cold iron steel
- Concrete
- Asbestos cement
- Vitrified clay
Q8 | Laser is a device to produce
- Beam of white light
- Beam of monochromatic light
- Coherent light
- X-rays
- Microwaves
Q9 | Which of the following has the highest malleability?
- Brass
- Cast iron
- Copper
- Aluminium
- Lead
Q10 | Notches in a section produce
- Compressive stress
- Shear stresses
- Biaxial tensile stresses
- Tri-axial tensile stresses
- None of the above
Q11 | In induction hardening
- Only d.c. supply is used
- The power factor is high
- The voltage is high
- The frequency is high
- The current is high
Q12 | Burger's vector is
- estimation of force9 of substit9utional atoms
- a defect in crystall structure
- a property of dislocations
- None of the above
- None of the above
Q13 | German silver is an alloy of
- Silver, gold and platinum
- Silver, copper and niclel
- Nickel, copper and zinc
- Silver with impurities below 1%
- Silver, copper and lead
Q14 | The atomic number of a certain element is 83. An atom of this element must contain
- 42 protons and 41 electrons
- 83 neutrous
- 1 neutron, 41 electrons and 41 protons
- 83 electrons
- None of the above is valid
Q15 | The electrical resistance of a semi-conductor
- Increases with temperature
- Decreases with temperature
- Does not change with temperature
- None of the above
Q16 | Coolant is used on a lathe
- To cool the work piece
- To cool the tool
- To remove the chips
- All the above
- None of the above
Q17 | Which one is different from the other in press work?
- Perforating
- Slitting
- Blanking
- Seaming
- Punching
Q18 | Hard steels and non-ferrous metal do not exhibit a definite yield point when pulled in the testing machine and for such cases a better measure of their elastic properties is defined by
- Yield point stress
- Yield point strain
- Proof stress
- Ultimate stress
- None of the above
Q19 | If the major quantium number of an atom is three, it possesses
- Only s and p electrons
- Only s electrons
- Only s, p and d electrons
- Only p electrons
- None of the above is true
Q20 | In an one component system containing two phases, at equilibrium the number of degrees of freedom would be
- Infinite
- 2
- 3
- 1
- 4
Q21 | The furnace used for castings of cast iron in a foundry shop is known as
- Electric induction furnace
- Muffle furnace
- Blast furnace
- Cupola
- Reverberatory furnace
Q22 | In fibre glass reinforced plastics, the glass fibres are primarily used to improve
- Mechanical properties of plastics
- Electrical properties of plastics
- Thermal properties of plastics
- Surface properties of plastics
- None of the above
Q23 | Application of tin is in
- bulb filaments
- low current fuses
- transducers
- hair springs
- None of the above
Q24 | The phenomenon of 'weld decay' is associated with
- Stainless steels
- Manganese steels
- Aluminium alloys
- Cast iron
- Brass
Q25 | German silver contains
- 5% silver
- 1% silver
- 10% silver
- No silver
- 0.1% silver