1
GATE PI 1992
MCQ (Single Correct Answer)
+5
-1.5
A generalized tool life equation for carbide tool for machining steel is given by
$$\,\,\,\,\,\,\,\,\,\,$$$$\,\,\,\,$$ $$V{T^a}{F^b}{D^c} = K,$$
Where $$V=$$ Cutting speed, meters/min,
$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $$T=$$ Tool life,
$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $$F=$$ feed, $$mm/rev,$$
$$D=$$ depth of cut in $$mm,$$ Indicates have magnitude $$a=0.3, b=0.3, c=0.15,$$

The change in productivity for the new processing conditions

A
$$5\% $$
B
$$11\% $$
C
$$25\% $$
D
$$130\% $$
2
GATE PI 1992
MCQ (Single Correct Answer)
+1
-0.3
In a grinding wheel marked with $$AA-48-L-7-V-25, L$$ refers to
A
abrasive type
B
wheel structure
C
wheel hardness
D
manufacturers
3
GATE PI 1992
MCQ (Single Correct Answer)
+1
-0.3
A blind hole is better tapped with a tap having
A
right hand flutes
B
left hand flutes
C
straight flutes
D
no flutes
4
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
$$15$$
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12