71. The surface to be left unmachined is marked on the pattern by
red colour
yellow colour
black colour
blue colour
✅ The correct answer is option C.
Workshop Technology MCQs
72. The shrinkage allowance for cast iron pattern is
10 mm/m
16 mm/m
20 mm/m
26 mm/m
✅ The correct answer is option A.
73. When two metal pieces of different thicknesses are to be welded by projection welding, then the projections should be made on __________ metal piece.
thinner
thicker
✅ The correct answer is option B.
74. In fore-hand welding, the angle between the welding rod and the work is kept as
30°-40°
40°-50°
50°-60°
60°-70°
✅ The correct answer is option A.
75. In a __________ , both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram.
simple die
progressive die
combination die
compound die
✅ The correct answer is option C.
76. In bending operation, the metal takes the shape of a punch.
Yes
No
✅ The correct answer is option A.
77. Fin is a casting defect which is due to thin projections of metal not intended as a part of casting.
Correct
Incorrect
✅ The correct answer is option A.
78. The current in electric resistance welding can be regulated by
varying the input supply
changing the primary turns of the transformer
changing the secondary turns of the transformer
any one of the above
✅ The correct answer is option B.
79. The correct sequence for preparing a billet for extrusion process is pickling, alkaline cleaning, phosphate coating and lubricating with reactive soap.
Yes
No
✅ The correct answer is option A.