1
GATE PI 1992
MCQ (Single Correct Answer)
+2
-0.6
A $$DC$$ servomotor is directly driving an $$NC$$ table. The pitch of the lead screw of the table is $$5$$ $$mm.$$ The motor rotates at $$100$$ $$rpm$$ for an applied voltage of $$10V.$$ If the voltage speed characteristic of the motor is linear, the applied voltage for a table of $$3m/min$$ is equal to:
A
$$30$$ $$V$$
B
$$60$$ $$V$$
C
$$33$ $$V$$
D
$$50$$ $$V$$
2
GATE PI 1992
MCQ (Single Correct Answer)
+1
-0.3
Thread rolling is restricted to
A
ferrous materials
B
ductile materials
C
hard materials
D
none of the above
3
GATE PI 1992
MCQ (Single Correct Answer)
+2
-0.6
If the elongation factor during rolling of an ingot is $$1.22.$$ The minimum number of passes needed to produce a section $$250 \times 250\,\,mm$$ from an ingot of $$750 \times 750\,\,mm$$ are
A
$$8$$
B
$$9$$
C
$$10$$
D
$$17$$
4
GATE PI 1992
Fill in the Blanks
+2
-0
To stress relive a cold worked steel part, it is heated to a temp close to ..... A....... and grains obtained after cooling are........ B.........
A. Lower critical temp/ upper critical temp
B. Fine / coarser
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
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CBSE
Class 12