- (A) below 723°C
- (B) 770 – 910°C
- (C) 910-1440°C
- (D) 1400-1539°C
- (E) above 1539°C
Mechanical Engineering Mcqs
- (A) 770°C
- (B) 910°C
- (C) 1050°C
- (D) below recrystallisation temperature
- (E) above recrystallization temperature
- (A) austenite
- (B) pearlite
- (C) ferrite
- (D) cementlte
- (E) bainite
- (A) has a fixed structure under all conditions
- (B) exists in several crystal forms at different temperatures
- (C) responds to heat treatment
- (D) has its atoms distributed in a random pattern
- (E) none of the above
- (A) stages at which allotropic forms change
- (B) stages at which further heating does not increase temperature for some time
- (C) stages at which properties do not change with increase in temperature
- (D) there is nothing like points of arrest
- (E) none of the above
- (A) malleable iron
- (B) nodular iron
- (C) spheroidal iron
- (D) grey iron
- (E) none of the above
- (A) 80% or more iron
- (B) 50% or more iron
- (C) alloying elements like chromium, tungsten nickel and copper
- (D) elements like phosphorus, sulphur and silicon in varying quantities
- (E) high quantities of sulphur
- (A) tenacity
- (B) brittleness
- (C) plasticity
- (D) corrosion resistance
- (E) hardness
- (A) free carbon
- (B) graphite
- (C) cementite
- (D) white carbon
- (E) ferrite
- (A) no graphite
- (B) a very high percentage of graphite
- (C) a low percentage of graphite
- (D) graphite as its basic constituent of composition
- (E) none of the above is true
