Which of the following is the lightest?
A.Molecule
B.Atom
C.Neutron
D.Electron
E.Proton
Category: Engineering Materials Mcqs
A solution of NaOH conducts electricity bcause NaOH is
A.A dielectric
B.A non-electrolyte
C.A strong electrolyte
D.A week electrolyte
E.None of the above
The modulus of elasticity E, the bulk modulus of elasticity K and the Poisson’s ratio are related by the relation
A.E = K (1 –
B.E = 2K (1 +
C.E = K (2 +
D.E = 3K (1 – 2
E.K = (1 +
Dies for drawing are generally made of
A.Cast iron
B.Mild steel
C.High carbon steel
D.Stainless steel
E.None of the above
Steel pipes are generally manufactured by
A.Machining process
B.Forging process
C.Extrusion process
D.Cold working process
E.Electroforming process
High ratio of surface to mass tend to
A.Produce smaller depths of hardening
B.Produce greater depth of hardening
C.Produce only chilled surfaces
D.Produce non-uniformity in hardness on surface
E.Produce surface defects
Steel with 0.8% carbon and 100% pearlite is called
A.Eutectoid
B.Hyper-eutectoid
C.Austenite
D.Solid’s
E.None of the above
The defect blow hole in castings is caused due to
A.Hard ramming
B.Excessive moisture
C.Improper venting
D.Excessive carbouacious material
E.Any of the above
The ability of a material to absorb energy in the plastic range is known as
A.Hardness
B.Fatigue strength
C.Creep
D.Toughness
E.Resilience
In flame hardening the flame used is
A.A wick stove
B.Oil burner
C.Gas burner
D.Oxy-acetylene
E.Oxygene air
