1
GATE PI 2005
MCQ (Single Correct Answer)
+2
-0.6
The following data relate to an orthogonal turning process:
$$\,\,\,\,\,\,\,\,\,\,\,$$Back rake angle $$=15deg,$$
$$\,\,\,\,\,\,\,\,\,\,\,$$Width of cut $$=2mm,$$
$$\,\,\,\,\,\,\,\,\,\,\,$$Chip thickness $$=0.4mm,$$
$$\,\,\,\,\,\,\,\,\,\,\,$$Feed rate $$=0.2mm/rev.$$

If the cutting force and the thrust force are $$900N$$ and $$810N,$$ the mean strength in $$Mpa$$

A
$$137.94$$
B
$$477.91$$
C
$$500.58$$
D
$$635.84$$
2
GATE PI 2005
MCQ (Single Correct Answer)
+1
-0.3
Tool life in the case of a grinding wheel is the time
A
between two successive regrinds of the wheel
B
taken for the wheel to be balanced
C
taken between two successive wheel dressings
D
taken for a wear of $$1$$ $$mm$$ on its diameter
3
GATE PI 2005
MCQ (Single Correct Answer)
+1
-0.3
In a shaper machine, the mechanism for tool feed is
A
Geneva mechanism
B
Whitworth mechanism
C
Ratchet and Pawl mechanism
D
Ward - Leonard system
4
GATE PI 2005
MCQ (Single Correct Answer)
+2
-0.6
One brand of milling machine has the following two index plates supplied along with the indexing head:
Plate 1: $$15, 16, 17, 18, 19, 20$$ hole circles.
Plate 2: $$21, 23, 27, 29, 31, 33$$ hole circles.

It is proposed to mill a spur gear of $$28$$ teeth using simple indexing method. Which one of the following combinations of index plate and number of revolutions is correct?

A
Plate $$1:1$$ revolution and $$9$$ holes in $$18$$ hole circles
B
Plate $$2:1$$ revolution and $$9$$ holes in $$21$$ hole circles
C
Plate $$2:1$$ revolution and $$9$$ holes in $$33$$ hole circles
D
Plate $$1:1$$ revolution and $$9$$ holes in $$15$$ hole circles
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