For producing cast iron pipes by centrifugal casting method the core used is
A.Sand core
B.Wax core
C.Metallic core
D.Clay core
E.No core is used
Category: Metallurgy Mcqs
Which colour of flame represents the highest temperature?
A.Dark red
B.Bright red
C.Light yellow
D.White
E.Pink
In grey cast iron, free graphite is in the form of
A.Fine powder
B.Needles
C.Flakes
D.Nodules
E.Crystals
Silicon when added to copper increases its
A.Machinability
B.Brittleness
C.Malleability
D.Hardness
E.Electrical conductivity
If during spark test, a sample gives dull red sparks, it could be
A.Cast iron
B.Wrought iron
C.Mild steel
D.Medium carbon steel
E.Non-ferrous material
Which of the following material is used for thermocouple junction?
A.Petwar
B.White metal
C.Nichrome
D.Magnanin
E.Invar
The operation that usually follwos hardening is
A.Annealing
B.Normalising
C.Tempering
D.Cyaniding
E.Carburising
The maximum percentage of carbon in austenite is
A.2.70%
B.2%
C.1.70%
D.0.70%
E.0.07%
Which of the following is not a hardening process?
A.Cyaniding
B.Nitriding
C.Sphcroidizing
D.Carburising
E.Induction hardening
Angularity of the square base pyramid in Vickers hardness tester is
A.90?
B.11?
C.120?
D.136?
E.150?
