On This Page
This set of Engineering Metallurgy Multiple Choice Questions & Answers (MCQs) focuses on Engineering Metallurgy Set 3
Q1 | As the tempering temp increases, hasdness of steel decreases
- true
- false
Q2 | In case of Austempering, the quenching which is carried out, from high temp is known as
- fast cooling
- slow cooling
- interrupted cooling
- none of the above
Q3 | In Austempering process, the final phase that is obtain after complete heat treatment cycle
- austenite
- bainite
- martensite
- pearlite
Q4 | After Austempering process, the phase bainite which obtain is highly hard and brittle phase
- false
- true
Q5 | one of the following is main advantage of Austempering process
- less distortion and cracking than martempering
- no need of final tempering process
- improvement in toughness
- all of the above
Q6 | hardenability is nothing but……..
- ability of metals to get high hardness
- ability of metals to reduce brittleness
- ability of metals to get through harden
- none of the above
Q7 | hardenability of a metal or alloy is largely depend upon one of the following factor?
- the carbon content of a steel
- the alloy content of steel
- quenchng medium
- all of the above
Q8 | One of the following defect is aride dur to heat treatment process
- quench crack
- warping
- soft spots
- all of the above
Q9 | case hardening processes are those where……..
- complete component is through harden
- complte component is melted
- only surface of the component ,whose hardness is incresed
- all of the above
Q10 | In carburisng process which of the following element is diffused in a metal surface?
- nitrogen
- oxygen
- carbon
- carbide dioxide
Q11 | Out of the following process,one is not valid with respect to carburising process
- solid
- liquid
- gas
- all of the above
Q12 | heat treatment is never required after carburisig treatment.this statement is …………
- false
- true
- not applicable
- none of the above
Q13 | In nitriding process which of the following element is diffused in a surface layer of a steel
- carbon
- carbon and nitrogen
- nitrogen
- all of the above
Q14 | one of the following is a step for the procedureof precipitation hardening or age hardening?
- solution treatment
- quenching
- aging
- all of the above
Q15 | One of the following metal alloy is suitable for the precipitation hardenable alloy?
- al-zn
- al-ni
- al-cr
- al-cu
Q16 | in case of flame hardening ,the heat source is in the form of …….
- lpg gas flame
- furnace oil flame
- oxy-acetylen flame
- none of the above
Q17 | in flame hardening process,the metal surface after heating to high temperature is quenched with ……
- oil
- brine water
- water
- all of the above
Q18 | In case of carbonitriding,by diffusion of which elements the surface become harder of a metal
- only carbon
- carbon and nitrogen
- only nitrogen
- none of the above
Q19 | Dislocation are stopped by a ……
- nuceation
- grain growth
- grain boundry
- none of the above
Q20 | Finer grain size,higher will be the …
- hardness
- ductility
- yield stress
- none of the above
Q21 | Work hardening also called as
- precipetation hardening
- hardening
- strain hardening
- none of the above
Q22 | some materials can not be work hardened at normal ambient temp. such as …….. Material.
- niobium
- indium
- beryllium
- none of the above
Q23 | In solid solution strengthening to ……the hardness of material.
- decreases
- increases
- reduced
- none of the above
Q24 | The number of solute atoms is more……will be the local distortion in the lattice.
- greater
- smaller
- less
- none of the above
Q25 | The press of finely distributed …….particles increases the elastic limit.
- soft
- hard
- atomic
- none of the above