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MCQ - Mechanical TNPSC JTO
JTO - 436 - Fitter - 436 - Unit VIII Metals Metal Non Metal

76)   

Zinc is added to copper to make brass mainly for:

A.
B.
C.
D.
Answer: A
77)   

Babbitt metal used for bearings contains:

A.
B.
C.
D.
Answer: A
78)   

Alnico is an alloy containing:

A.
B.
C.
D.
Answer: C
79)   

Constantan (used in thermocouples) is an alloy of:

A.
B.
C.
D.
Answer: B
80)   

The lightest structural metal among the given is:

A.
B.
C.
D.
Answer: A
81)   

Which non-ferrous metal has the highest electrical conductivity?

A.
B.
C.
D.
Answer: C
82)   

Cladding is the process of:

A.
B.
C.
D.
Answer: B
83)   

Which process involves spraying molten metal on a surface to form a coating?

A.
B.
C.
D.
Answer: A
84)   

Cementation for surface hardening involves:

A.
B.
C.
D.
Answer: B
85)   

Which metal is commonly electroplated on automobile parts for decorative purposes?

A.
B.
C.
D.
Answer: B
86)   

The electrolyte used for silver electroplating is generally:

A.
B.
C.
D.
Answer: B
87)   

In galvanizing, zinc coating protects iron mainly by:

A.
B.
C.
D.
Answer: B
88)   

The most common method of galvanizing is:

A.
B.
C.
D.
Answer: B
89)   

The main cause of rusting in iron is:

A.
B.
C.
D.
Answer: B
90)   

Nitriding introduces which element into the surface?

A.
B.
C.
D.
Answer: B
91)   

Cyaniding is carried out in a bath of:

A.
B.
C.
D.
Answer: B
92)   

Which surface hardening process is best suited for small parts and tools?

A.
B.
C.
D.
Answer: B
93)   

The body-centered cubic (BCC) form of iron stable at room temperature is called:

A.
B.
C.
D.
Answer: B
94)   

The face-centered cubic (FCC) form of iron is known as:

A.
B.
C.
D.
Answer: B
95)   

Spheroidizing annealing is done mainly to:

A.
B.
C.
D.
Answer: B
96)   

Stress-relief annealing is used to:

A.
B.
C.
D.
Answer: B
97)   

Compared to annealing, normalizing produces:

A.
B.
C.
D.
Answer: B
98)   

Normalizing is preferred over annealing when:

A.
B.
C.
D.
Answer: A
99)   

Quenching of steel is done to:

A.
B.
C.
D.
Answer: A
100)   

In hardening, which factor most affects distortion and cracking?

A.
B.
C.
D.
Answer: B