A. Tempering
B. Rapid heating
C. Rapid cooling
D. Slow cooling
Related Mcqs:
- Annealing of white cast iron produces _____________________ iron?
A. Grey
B. Nodular
C. Malleable
D. Spheroidal - Carbon is present in the form of _______________________ in grey cast iron ?
A. Spheroids
B. Nodular aggregates of graphite
C. Flakes
D. Cementite - ______________________ iron is produced by the annealing of white cast iron?
A. Malleable
B. Nodular
C. Ductile
D. Grey - ______________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently ?
A. Collar
B. Flanged
C. Bell and Spigot
D. Expansion - Cast iron contains ____________________ percent carbon?
A. 2.5
B. 3.75
C. 4.75
D. 5.25 - Steel & cast iron pipes are produced by ______________ casting ?
A. Slush
B. Die
C. Investment
D. True centrifugal - Silicon percentage in acid resistant cast iron is about ___________________?
A. 4
B. 8
C. 14
D. 20 - Cupola produces _________________ iron?
A. Pig
B. Cast
C. Wrought
D. Carbon free - Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of_________________?
A. Lumps
B. Pellets
C. Briquettes
D. Sinter - Iron content in Indian iron ore is about _________________ percent?
A. 80-85
B. 60-65
C. 40-45
D. 20-25