62.

63.

64.

85.

66.

67.

68,

69,

70.

71,

Which of the following 18 not a casting defect?
(A) Hot tear
(0) Scab

Grey cast iron is best welded by :
(4) TIG
(0 Oxy-acetylene welding

Value of coefficient of friction in hat forming is :

(A) 0.4
(0 0.6
Slag inclusion in casting is 8 :
(ಗ) surface defects
(C) ಣೇ

Wax pattern is used in :
(ಗಿ) die casting
(0) investment casting

In drawing operation, the metal flows due to :
(ക) ductility
(0 plasticity

In compound dies :

(0)
(D)

(0)
(D)

(0)
00

(8)
(D)

(0)
യു

(0)
फ)

ر6

Blow hole
Decarburization

Arc welding
Submerged arc welding

0.5
0.7

internal defect
notch

shell moulding
plaster boards,

work hardening
shearing

two or more cutting operations can be performed simultaneously
cutting and formation operations are combined and carried out in single operation
work piece moves from one station to other with separate operation performed at

1:2
3:2

(^)

(0)

(0)

each section
(D) all of the above
The usual ratio of forward and return stroke in shaper is :

@ 2:1

© 2:3

Chip breakers are provided on cutting tools :
(A) for safety of operator
(C) permit short segmented chips

The power factor of a purely inductive circuit is :

(A) lagging
(0) =zero

11

(1)

(0)
യു

(B)
(D)

to minimize heat generation
increase tool life

leading
unity

090/2016
[P.T.O]