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This set of Engineering Metallurgy Multiple Choice Questions & Answers (MCQs) focuses on Engineering Metallurgy Set 1
Q1 | An eutectoid steel consists of
- wholly pearlite
- wholly austenite
- pearlite and ferrite
- pearlite and cementite
Q2 | In normalizing, one of the following is not correct
- it relieves internal stresses
- it produces a uniform structure
- the rate of cooling is rapid
- the rate of cooling is slow
Q3 | Fine grain sizes are obtained by
- slow cooling
- increasing nucleation rate
- decreasing growth rate
- fast cooling
Q4 | Which one of the following is not the purpose of full annealing
- refines grains
- induces softness
- removes strains and stresses
- produces hardest material
Q5 | Annealing is generally done to impart
- hardness to the material
- softness to the material
- brittleness to the material
- high conductivity to the material
Q6 | Which of the following processes is used to harden a steel?
- normalizing
- annealing
- carburizing
- quenching
Q7 | The hardness of quenched Martensite
- increases with increasing carbon percentage
- decreases as carbon percentage increases
- first increases and then remains almost constant as the carbon percentage increases
- first increases and then decreases as carbon percentage increases.
Q8 | Match the phases of steel in Group I with the crystal structures in Group II P. Martensite 1. bcc Q. Cementite 2. fcc R. Austenite 3. bct S. Ferrite 4. Orthorhombic
- p-3, q-4, r-1, s-2
- p-2, q-3, r-1, s-4
- p-3, q-4, r-2, s-1
- p-4, q-3, r-2, s-1
Q9 | Dispersion hardening materials can be produced with the help of followinf process
- forging
- rolling
- powder metallurgy
- none of the above
Q10 | in case of carbonitriding by diffusion of which elements the surface become harder of the metal
- only carbon
- carbon and nitrogen
- only nitrogen
- none of the above
Q11 | in case of flame hardening the heat source in the form of
- lpg gas flame
- furnace oil flame
- oxy-acetelene flame
- none of the above
Q12 | in jominy end quench test sample is quenched by
- water
- oil
- brine water
- all of the above
Q13 | martempering is also known as
- marheating
- marcooling
- marquenching
- none of the above
Q14 | In martempering heat treatment, the final phase which obtain
- ferrite
- austenite
- pearlite
- none of the above
Q15 | In petenting process, which is the final phase obtainafter completion of heat treatment
- pearlite
- bainite
- martensite
- austenite
Q16 | which of the following metal alloy is suitable for the precipitation hardenable alloy.
- al-zn
- al-ni
- al-cr
- al-cu
Q17 | Pearlite is harder than ferrite,this statement is-------
- true
- false
- not applicable
- none of the above
Q18 | Cementite is harder than pearlite,this statement id -------
- false
- true
- not applicable
- none of the above
Q19 | The Atomic structure of austenite phase is
- b.c.c
- b.c.t
- h.c.p
- f.c.c
Q20 | The Atomic structure of martensite is
- b.c.c
- b.c.t
- h.c.p
- f.c.c
Q21 | In case of annealing heat treatment process hypoeutectoid steels are heated above --------- temperature
- ac1
- ac3
- acm
- none of the above
Q22 | In case of Normalizing heat treatment process hypoeutectoid steels are heated above --------- temperature
- ac1
- ac3
- acm
- none of the above
Q23 | In case of hardening heat treatment process hypoeutectoid steels are heated above --------- temperature
- ac1
- ac3
- acm
- none of the above
Q24 | In case of Annealing heat treatment process hypereutectoid steels are heated above --------- temperature
- ac1
- ac3
- acm
- none of the above
Q25 | In case of hardening heat treatment process hypereutectoid steels are heated above --------- temperature
- ac1
- ac3
- acm
- none of the above