The consitituent which has a powerful softening effect on cast iron and its presence in cast iron reduces the ability of the iron to retain carbon in chemical combination, is
A.Silicon
B.Aluminium
C.Carbon
D.Sulphur
E.Chromium
Category: Engineering Materials Mcqs
Spot the process which is different from others?
A.Carburizing
B.Nitriding
C.Cyaniding
D.Chapmanizing
E.Galvanizing
In Brinell hardness testing the time of loading is
A.15 seconds
B.30 seconds
C.1 minute
D.5 minutes
E.10 minutes
If steel is quenched in oil the structure obtained is
A.Pearlite
B.Sorbite
C.Troosite
D.Acicular
E.Martensite
Cold shuts are
A.Saturation of pores in bricks
B.Saturation of pores in metals by subsituting materials different from parent materials
C.Defects in castings due to two streams of metal which are too cold to fuse properly
D.Forging defects due to improper heating of materials
E.None of the above
German silver contains
A.No silver
B.0.1% silver
C.1% silver
D.5% silver
E.10% silver
Which of the following method can be used for thermoplastic materials?
A.Blow moulding
B.Casting
C.Calendering
D.Compression moulding
Cast iron contains
A.0.2 to 0.4% carbon
B.0.4% to 0.7% carbon
C.1 to 1.3% carbon
D.2 to 4% carbon
E.None of the above
In induction hardening
A.The voltage is high
B.The current is high
C.The frequency is high
D.The power factor is high
E.Only d.c. supply is used
If steel is quenched in water, the structure obtained is
A.Pearlite
B.Sorbite
C.Troosite
D.Acicular
E.Martensite
