On This Page
This set of Engineering Materials Multiple Choice Questions & Answers (MCQs) focuses on Engineering Materials Set 3
Q1 | The property of materials by which they can be drawn into wires is known as
- Creep
- Malleability
- Elasticity
- Plasticity
- Ductility
Q2 | The strength of timber is
- less along the grains more across the grains
- more along the grains less across the grains
- same in all directions
- maximum in a direction at 45? to the longitudinal axis
- None of the above
Q3 | Permalloy is
- An nickel and iron alloy having high permeability
- An alloy similar to carbides
- A non-ferrous alloy containing nickel copper and chromium
- A kind of stainless steel
- A non-ferrous alloy used in aircraft industry
Q4 | Visco-elastic behaviour is common in
- Crystalline materials
- Non-crystalline solids
- Plastics
- Rubber
- Non-crystalline organic polymers
Q5 | The hardness of steel depends on
- Heating temperature before quenching
- The shape and distribution of carbides in iron
- Amount of carbon it contains
- Basic process from which it is produced
- Percentage of alloying elements
Q6 | When a current is passed through the junction of two different metals, heat is absorbed or liberated depending on the direction of the current. The above phenomenon is known as
- Kelvin effect
- Joule's effect
- Peltier's effect
- None of the above
- None of the above
Q7 | Hastalloy consists of
- Copper and aluminium
- Nickel and molybdenum
- Aluminium and nickel
- Nickel and copper
- Nickel, copper and aluminium
Q8 | Which of the following hardness tester can be used to determine the hardness of a glass sheet?
- Brinell hardness tester
- Vickers hardness tester
- Rockwell hardness tester
- Shore scleroscope
- None of the above
Q9 | A material is known as allotropic or polymoriphic if it
- Has its atoms distributed in random pattern
- Responds to heat tretment
- Has a fixed structure under all conditions
- Exists in several crystal forms at different temperatures
- Can be cast
Q10 | A piezo electric is
- a material which become polarised when stressed
- a material which changes dimension due to applied field
- a material that never gets polarised
- a material in which magnetising force reduces when current flowing is increased
- None of the above
Q11 | A material with unequal anti-parallel atomic magnetic moments is
- an anti-ferromagnetic
- ferrimagnetic
- ferrite
- non-magnetic
- None of the above
Q12 | Boring is generally
- Followed by reaming
- Preceded by reaming
- Followed by drilling
- Preceded by drilling
- None of the above
Q13 | Ferromagnetic alpha iron change to paramagnetic alpha iron at
- 1500?C
- 910?C
- 77?C
- 1400?C
- 1650?C
Q14 | If a body has identical properties all over it is known as
- Ductile
- Isentropic
- Plastic
- Elastic
- Homogeneous
Q15 | The technique of converting metallic powders into articles of definite form is known as
- High pressure pressing
- Carbiding
- Powder metallurgy
- Plasticizing
- None of the above
Q16 | In Brinell hardness testing, while determining hardness of aluminium
- Indenting ball of smaller diameter is used
- Time of loading is reduced
- Load on the indenter is reduced
- Plastic
Q17 | In flame hardening the flame used is
- Oil burner
- A wick stove
- Oxygene air
- Gas burner
- Oxy-acetylene
Q18 | Viscoelastic materials show behaviour which is
- Elastic
- Inelastic
- Independent of time
- Plastic
- Time dependent
Q19 | Age hardening is generally applicable to
- Alloys of aluminium, magnesium, nickel etc
- High alloy steels
- Cast iron
- Alloys of chromium, vanadium etc
- Medium carbon steels
Q20 | Inconel is an alloy containing
- Nickel, zinc and iron
- Copper nickel and chromium
- Nickel, chromium and iron
- Nickel, copper and iron
- Copper, nickel and cobalt
Q21 | Just as strong is opposite to weak, similarly brittle is opposite to
- Tough
- Rigid
- Elastic
- Soft
- Hard
Q22 | Gel is
- a polymer having side groups distributed randomly along a vinyl polymer chain
- a polymer having secondary chains branching from the main molecular chains
- A solid frme work of colloidal particles linked together and containing a fluid in its interstices
- a polymer in which the repeating unit of each moleule has viny group
- None of the above
Q23 | Aluminium alloys for pressure die casting
- Must possess considerable fluidity
- Must not be free from hot shortness
- Must have iron as one of the constituents
- Must be light
- None of the above
Q24 | Carburizing is done
- By heating 200?C below critical temperature
- On steels with carbon percentage of 0.5%
- To induce soft surface for machining on a hard core
- To improve hardenability of steel
- On steel with carbon percentage of 0.7%
Q25 | The amount of cold work that a metal will stand is dependent upon
- Room temperature
- Carbon percentage
- Ductility
- Purity of metal
- Process