Sparks Academy
SPARKS ACADEMY
Online Test Series
8190879379 Chennai

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

51)   

The hardness of white cast iron is mainly due to:

A.
B.
C.
D.
Answer: C
52)   

Which cast iron has spheroidal graphite structure for better strength?

A.
B.
C.
D.
Answer: D
53)   

Cupola furnace is generally used for the production of:

A.
B.
C.
D.
Answer: B
54)   

Malleable cast iron is obtained by heat-treating:

A.
B.
C.
D.
Answer: B
55)   

Wrought iron is produced mainly by removing:

A.
B.
C.
D.
Answer: A
56)   

Slag inclusions in wrought iron improve:

A.
B.
C.
D.
Answer: C
57)   

Wrought iron is not used for:

A.
B.
C.
D.
Answer: D
58)   

Stainless steel mainly contains:

A.
B.
C.
D.
Answer: A
59)   

Tool steels are generally:

A.
B.
C.
D.
Answer: C
60)   

Heat treatment of steel is carried out mainly to:

A.
B.
C.
D.
Answer: B
61)   

The open-hearth process for steel production uses:

A.
B.
C.
D.
Answer: B
62)   

Aluminium forms a protective coating of:

A.
B.
C.
D.
Answer: B
63)   

Which of the following is not an aluminium alloy?

A.
B.
C.
D.
Answer: C
64)   

Magnalium is an alloy of:

A.
B.
C.
D.
Answer: A
65)   

Lead is unsuitable for structural purposes because:

A.
B.
C.
D.
Answer: B
66)   

Lead is widely used for making:

A.
B.
C.
D.
Answer: A
67)   

The melting point of lead is about:

A.
B.
C.
D.
Answer: A
68)   

The phenomenon in which tin changes into a powdery form at low temperature is called:

A.
B.
C.
D.
Answer: B
69)   

Pewter is an alloy mainly of:

A.
B.
C.
D.
Answer: B
70)   

The melting point of tin is about:

A.
B.
C.
D.
Answer: C
71)   

Which of the following is not a copper alloy?

A.
B.
C.
D.
Answer: D
72)   

Monel metal contains:

A.
B.
C.
D.
Answer: B
73)   

Copper develops a greenish coating on exposure to air, called:

A.
B.
C.
D.
Answer: B
74)   

The melting point of zinc is about:

A.
B.
C.
D.
Answer: A
75)   

German silver is an alloy of:

A.
B.
C.
D.
Answer: A