Number of isotopes for iron is
A.1
B.2
C.3
D.4
E.Nil
Category: Engineering Materials Mcqs
Ductility of material may be defined as
A.Ability to undergo large permanent deformations in tension
B.Capacity to withstand reversal of stresses
C.Ability to undergo temporary deformation in tension
D.Capacity to withstand combined tensile and shear forces
E.Capacity to resist deformation under pressure
Which of the following is used for imitation jewellery?
A.Silicon bronze
B.Babbit alloy
C.Duralumin
D.Aluminium bronze
E.Gun metal
Which of the following hardness tester can be used to determine the hardness of a glass sheet?
A.Brinell hardness tester
B.Vickers hardness tester
C.Rockwell hardness tester
D.Shore scleroscope
E.None of the above
The raw material for mini steel plants is
A.Iron ore
B.Pig iron
C.Grey iron
D.CI and steel scrap
E.None of the above
Which is amorphous material out of the following?
A.Zinc
B.Lead
C.Silver
D.Brass
E.Glass
Diamagnetic materials are
A.Only slightly magnetised
B.Strongly magnetised
C.Magnetised with eddy currents only
D.Magnetised in a direction opposite to that of the applied field
E.None of the above
Steel balls for ball bearings are hardened to
A.100 VPN
B.150-200 VPN
C.200-400 VPN
D.400-700 VPN
E.700-800 VPN
Visco-elastic behaviour is common in
A.Crystalline materials
B.Non-crystalline solids
C.Non-crystalline organic polymers
D.Plastics
E.Rubber
The specific gravity of cast iron is closer to
A.3
B.5
C.7
D.9
E.11
