1
GATE PI 1993
MCQ (Single Correct Answer)
+2
-0.6
A work-piece of $$2000$$ $$mm$$ length and $$300$$ $$mm$$ width was machined by a planning operation with the feed set at $$0.3$$ $$mm/stroke.$$ If the machine tool executes $$10$$ double strokes/min, the planning time for a single pass will be
A
$$50$$ $$min$$
B
$$100$$ $$min$$
C
$$200$$ $$min$$
D
$$220min$$
2
GATE PI 1992
MCQ (Single Correct Answer)
+2
-0.6
Find the speed range ratio for the drilling machine spindle if the minimum and maximum diameters of drills used are $$5$$ $$mm$$ and $$25$$ $$mm$$ respectively and if the machinability indices for the work materials are $$120$$ (brass) and $$40$$ (alloy steel)
A
$$3/5$$
B
$$5/3$$
C
$$5$$
D
$$15$$
3
GATE PI 1992
MCQ (Single Correct Answer)
+2
-0.6
If the index crank of a dividing head is turned through one complete revoluation and $$10$$ holes in a $$30$$ hole circle plate, the work piece turns through (in degrees)
A
$$6$$
B
$$12$$
C
$$240$$
D
$$480$$
4
GATE PI 1991
MCQ (Single Correct Answer)
+2
-0.6
A drilling machine has to be designed with $$8$$ spindle speeds ranging approximately between $$120$$ to $$1200$$ $$rpm.$$ The $${5^{th}}$$ spindle speed is
A
$$445$$
B
$$480$$
C
$$620$$
D
$$865$$
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