On This Page
This set of Engineering Materials Multiple Choice Questions & Answers (MCQs) focuses on Engineering Materials Set 7
Q1 | When the atomic magnetic moments are randomly oriented in a solid, its magnetic behaviour is termed as
- polycrystalline
- anti-ferromagnetic
- paramagnetic
- semi-magnetic
- None of the above
Q2 | Plastic are
- Good conductors of heat and bad conductors of electricity
- Good conductors of heat as well as electricity
- Bad conductors of heat and good conductors of electricity
- Bad conductors of heat as well as electricity
- Semi-conductors
Q3 | Which of the following does not contain copper as one of the alloying elements?
- Monel metal
- Perminivar
- Nichrome
- Manganin
- All of the above
Q4 | When the metals are severely deformed in a particular direction, as in rolling or forging (on a macro scale), the mechanical properties may be
- Anisotropic
- Identical
- Isotropic
- Uniform
- Non-uniform
Q5 | The product of blast furnace is known as
- High carbon steel
- Steel
- Pig iron
- Crude iron
- Cast iron
Q6 | The defect responsible for the phenomenon of slip, by which most metals deform plastically, is known as
- Fracture
- Twinning
- Dislocation
- Strain hardening
- None of the above
Q7 | In a 0.2% carbon steel which has been heated above the third critical temperature on cooling at the first critical point the austenite remaining in solution is transformed to new structure called
- Ferrite
- Cementite
- Austenite
- Ferrite
- Pearlite
Q8 | Which material has the best damping capacity
- Cast iron
- Mild steel
- High speed steel
- Diamond
- Stainless steel
Q9 | If a material recovers its original dimensions, when the load is removed, it is known as
- Elastic
- Soft
- Annealed
- Plastic
- Brittle
Q10 | In plain carbon steel as the percentage of carbon increases from 0.2% to 0.8% which of the following decreases?
- Brinell hardness number
- Tensile strength
- Percentage elongation
- All of the above
- None of the above
Q11 | In press work the dies which combine two or more operations at one station are known as
- Progressive dies
- Die and punch
- Simple dies
- Compound dies
- Press
Q12 | Spring steel sections are originally applied in
- Hardened condition
- Hardened and tempered condition
- Annealed condition
- Carburized condition
- None of the above
Q13 | Which of the following ray has least wavelength?
- Yellow light rays
- Ultraviolet rays
- X-rays
- Cosmic rays
- Infra-red rays
Q14 | Cheek is
- Top surface of metal
- Physical property of metal
- Non-ferrous coating on materials
- Core of the welded joints in case of very thick material
- Intermediate flask between copes and drag
Q15 | Which of the following is 'acceptor' impurity for semi-conductor?
- Arsenic
- Phosphorous
- Boron
- Antimony
- All of the above
Q16 | The loss of strength in compression which occurs when there is a gain in strength in the tension due to overloading is
- Iso-strain
- Hysteresis
- Bounhinger effect
- Relaxation
- Hooke's effect
Q17 | Electronic structure of a material is generally studied by
- Mossbauer studies
- Microscope
- Naked eye
- X-ray and electron diffraction
- Spectroscope techniques
Q18 | Steel castings
- Cannot withstand impact
- Are not weldable
- Are weldable
- Have poor endurance properties
- Can withstand impact
Q19 | Cold shuts are
- Saturation of pores in bricks
- Saturation of pores in metals by subsituting materials different from parent materials
- Defects in castings due to two streams of metal which are too cold to fuse properly
- Forging defects due to improper heating of materials
- None of the above
Q20 | The property of metal when the recovery after unloading is complete but not instantaneous is
- Plsticity
- Visco elasticity
- An elasticity
- Inelasticity
- Elasticity
Q21 | Cast irons are generally specified by
- Hardness
- Carbon percentage
- Tensile strength
- Iron percentage
- Process of manufacture
Q22 | Identify the incorrect statement
- Hot working performed on the metals is in a plastic state
- Much greater pressures are needed for ot working than for cold working
- When material is cold worked the resulting change in material shape brings about marked changes in the grain structure
- Structural changes in cold working are grain fragmentation and lattice distortion
- Residual stresses are set up in cold working
Q23 | Galvanizing is generally done on
- Low carbon steels
- Cast iron
- Non-ferrous metals
- Non-metallic substances
- None of the above
Q24 | A Babitt is
- A cutectic of iron and iron phosphide
- A gadget for measuring volume
- A measure of magnetic induction produced in a material
- None of these
- Antimony bearing lead or tin alloy
Q25 | Which of the following colour of light has the least wavelength?
- Violet
- Green
- Blue
- Orange
- Red