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57.

58.

59.

60.

61.

62.

In leftward welding technique of oxy-acetylene gas welding, the blow pipe is held at
an angle between
A) 10° to 20° B) 30° to 40° C) 40° to 50° D) 60° to 70°
The type of AC arc welding transformer is
A) Step up transformer B) Step down transformer
C) Auto transformer D) Power transformer
Hydrochloric acid is used as flux for soldering which material ?
A) Steel B) Brass C) Zinc D) Lead
Which among the following is not a method of Brazing ?
A) Electroslag Brazing B) Induction Brazing
C) Furnace Brazing D) Torch Brazing

Which of the following statements is/are correct about pattern making in casting ?

iv.
A)

Wood is the most common material for making patterns for castings.

When a metal pattern is cast itself using a wooden pattern, then the wooden
pattern is called a dummy pattern.

A good pattern is one which can be easily worked, shaped and joined and
should be light in weight.

Plastics are not used as pattern material for casting.
Only ii and iii 8) Only i and iv C) Onlyi,iiandiii டி) Onlyi andiii

Arrange the below stages of casting as per their order of manufacturing sequence.

ھ 5 929

യയ

Testing and inspection
Melting and casting
Moulding and core making
Fettling

Pattern making
e-d-c-—b-a
a-e-c-—b-d
e-c-—b-d-a
c-d-b-e-a

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