MCQ - TNPSC JTO
JTO - 436 - Fitter
436 - Unit VIII Metals Metal Non Metal
33)
The primary use of zinc is:
A.
B.
C.
D.
34)
Zinc is used in making brass because it:
A.
B.
C.
D.
35)
The density of zinc is about:
A.
B.
C.
D.
36)
The main constituents of steel microstructure are:
A.
B.
C.
D.
37)
Pearlite is a mixture of:
A.
B.
C.
D.
38)
The main purpose of annealing is to:
A.
B.
C.
D.
39)
In full annealing, steel is heated:
A.
B.
C.
D.
40)
Cladding is the process of:
A.
B.
C.
D.
41)
The main difference between normalizing and annealing is:
A.
B.
C.
D.
42)
Normalizing produces:
A.
B.
C.
D.
43)
Hardening of steel is achieved by:
A.
B.
C.
D.
44)
The structure obtained after hardening is:
A.
B.
C.
D.
45)
Tempering is carried out after hardening mainly to:
A.
B.
C.
D.
46)
During tempering, steel is heated:
A.
B.
C.
D.
47)
31. Which of the following is not a method of surface hardening?
A.
B.
C.
D.
48)
Which of the following metals naturally forms a protective oxide film that resists corrosion?
A.
B.
C.
D.