57. German silver is an alloy of
A.Silver and some impurities
B.Refined silver
C.Nickel, copper and zinc
D.Nickel and copper

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58. Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is
A.Silver metal
B.Invar alloy
C.Hastelloy
D.Monel metal

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59. A cold chisel is made of
A.Mild steel
B.Cast iron
C.H.S.S.
D.High carbon

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60. An engineer's hammer is made of
A.Cast iron
B.Forged steel
C.Mild steel
D.High carbon steel

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61. Inconel is an alloy of
A.Nickel, chromium and iron
B.Nickel, copper
C.Nickel, chromium
D.Nickel, zinc

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62. By severely deforming a metal in a particular direction it becomes
A.Ductile
B.Anisotropic
C.Homogeneous
D.Isotropic

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63. Solder is an alloy consisting of
A.Tin, antimony, copper
B.Tin and copper
C.Tin and lead
D.Lead and zinc

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