On This Page
This set of Engineering Materials Multiple Choice Questions & Answers (MCQs) focuses on Engineering Materials Set 11
Q1 | Electro-forming is particularly vauable for
- Non-ferrous components
- Good conductors of electricity
- Parts which cannot be machined
- Decorative items
- Thin walled parts requiring a high order of accuracy and internal surface finish
Q2 | Wrought iron is
- Melts easily at 1500?C
- Easily hardened
- Used for castings
- Not used for castings
- Least resistant to corrosion fatigue stresses
Q3 | Which one is different from the remaining
- Flame hardening
- Electroplating
- Cynding
- Nitriding
- Pack carburizing
Q4 | All of the following are examples of ceramic materials EXCEPT
- Bakelite
- Aluminium oxide
- Magnesium oxide
- Glass
- None of the above is true
Q5 | Process of making a thin phosphate coating on steel to act as a base or primer for enamels and paints in known as
- Prepainting
- Colourizing
- Anodising
- Surface preparing
- Parkerizing
Q6 | A thermocouple works on which of the following effect?
- Thomson effect
- Seeback effect
- Peltier effect
- Joule effect
- None of the above
Q7 | The highest percentage of carbon that an iron carbon alloy can have is
- 3%
- 4.40%
- 12.12%
- 2%
- 6.60%
Q8 | A lead based bearing alloy contains
- Lead-nickle-tin
- Lead-aluminium-copper
- Lead-antimony-tin-silver
- Lead-antimony-tin-copper
- Lead-copper-tin-copper
Q9 | The solid solution carbon in alpha iron obtained on cooling of 0.2% carbon steel which have been heated above the third critical point is called
- Austenite
- Pearlite
- Ferrite
- Ferrite
- Cementite
Q10 | Corrosion resistance of steels is increased by the addition of alloying elements like
- Tungsten
- Chromium and nickel
- Cobalt and vanadium
- Silicon and sulphur
- Sulphur
Q11 | Galena is the ore for
- Zinc
- Lead
- Germanium
- Aluminium
- Copper
Q12 | Plastic deformation which is carried out in a temperature region and over a time interval such that the strain hardening is not relieved is known as
- Hot work
- Cold work
- Annealing
- Bauschinger effect
- None of the above
Q13 | Within elastic limits
- Load is gradually applied
- Deformation is permanent
- Deformation is proportional to the load
- Load is less
- Load is static
Q14 | The ability of material to absorb energy when deformed elastically and to return it when unloaded is called
- Resilience
- Fatigue strength
- Creep
- Toughness
- Hardness
Q15 | The variable stress below which the probability of failure of a material is negligible, is called
- Endurance limit
- Tolerance limit
- Yield point
- Elastic limit
- Plastic limit
Q16 | In a glass metal seal the two components must match with respect to their
- Fatigue strength
- Hardness
- Semi-conductors
- Ductility
- Thermal expansion
Q17 | The phenomenon of materials in which slow extension of materials takes place with the time at constant load is known as
- Malleability
- Elasticity
- Plasticity
- Creep
- Ductility
Q18 | Tensile strength of common varieties of cast iron is in the range
- 40 - 50 M Pa
- 50 - 80 M Pa
- 500 - 650 M Pa
- 650 - 1000 M Pa
- 140 - 500 M Pa
Q19 | Which of the following material has least coefficient of expansion?
- Dead mild steel
- Brass
- Manganin
- Y-alloy
- Invar
Q20 | Iron alloyed with carbon more than 2% is called
- Mild steel
- Carbon steel
- Cast iron
- Alloy steel
- High carbon steel
Q21 | A surface damage which results when two surfaces in contact experience light periodic relative motion is
- Fretting
- Pitting
- Corrosion
- Surface wear
- None of the above
Q22 | During induction hardening the depth of hardening is controlled by
- Current
- Voltage
- Frequency
- Phase angle
- None of the above
Q23 | Stress concentration may be caused by
- Change in shape
- A home or a notch in the body
- Polishing or painting a surface
- Change in dimensions
- Change in cross-sectional area
Q24 | Polystrene at room temperature is
- Brittle
- Malleable
- Ductile
- Soft
- None of the above
Q25 | Small end of a connecting rod forging is
- Super finished
- Ground
- Broached
- Honned
- Lapped