Which of the following material is not used for cyaniding?
A.Sodium carbonate
B.Sodium chloride
C.Sodium hydroxide
D.Sodium cyanide
E.All of the above
Category: Metallurgy Mcqs
Persence of lead in brass improves
A.Machining properties
B.Hardenability
C.Ductility
D.Malleability
E.Fatigue resistance
Which of the following is usually made of dead mild steel?
A.Flanges
B.Shafts
C.Fish plates
D.Gears
E.Spades
Warping of articles during heat treatment may be due to
A.non-uniform heating
B.non-uniform cooling
C.internal stresses in the article before heating
Which metal has the highest melting point?
A.Antimony
B.Chromium
C.Gold
D.Stainless steel
The crystal structure of brass is
A.BCC
B.FCC
C.HCP
D.Orthorhombic
E.Mixture of all above
Which of the following constituent will increase the hardness of steel?
A.Martensite
B.Pearlite
C.Austenite
D.Cementite
E.All of the above
The property of a metal when the recovery after unloading is complete but not instantaneous is
A.creep
B.Inelasticity
C.Anelasticity
D.Viscoelasticity
Brinell hardness of nitrided surface may be of the order of
A.100
B.150 to 200
C.200 to 250
D.300 to 450
E.More than 600
In Brinell hardness testing the minimum thickness of the specimen should be
A.Less than 5 times the depth of impression
B.Less than 10 times the depth of impression
C.Equal to 10 times the depth of impression
D.More than 10 times the depth of impression
E.Thickness of specimen has no relevance to the depth of impression
