1
GATE PI 2003
MCQ (Single Correct Answer)
+2
-0.6
The purpose of helical grooves in a twist drill is to
$$1.$$ Improve the stiffness
$$2.$$ Save a tool material
$$3.$$ Provide space for chip removal
$$4.$$ Provide rake angle for the cutting edge

Select the correct answer suing the codes given below

A
$$1$$ & $$2$$
B
$$2$$ & $$3$$
C
$$3$$ & $$4$$
D
$$1$$ & $$4$$
2
GATE PI 2003
MCQ (Single Correct Answer)
+2
-0.6
Tool life equation for two tools under consideration are as follows

$$\eqalign{ & HSS:\,\,\,\,\,\,\,\,\,\,\,\,\,V{T^{0.2}} = 150 \cr & Carbide:\,\,\,\,\,\,V{T^{0.3}} = 250 \cr} $$
Where $$V$$ is the cutting speed in $$m/min$$ and $$T$$ is the tool life in $$min.$$ The breakdown cutting speed above which the carbide tool will be beneficial is

A
$$54$$ $$m/min$$
B
$$150$$ $$m/min$$
C
$$194$$ $$m/min$$
D
$$250$$ $$m/min$$
3
GATE PI 2003
MCQ (Single Correct Answer)
+2
-0.6
Match the mechanism with Machine GATE PI 2003 Machine Tools and Machining - Machining Question 24 English
A
$$P - 3,\,\,Q - 1,\,\,R - 2,\,\,S - 4$$
B
$$P - 3,\,\,Q - 4,\,\,R - 1,\,\,S - 5$$
C
$$P - 2,\,\,Q - 4,\,\,R - 5,\,\,S - 3$$
D
$$P - 2,\,\,Q - 3,\,\,R - 4,\,\,S - 5$$
4
GATE PI 2003
MCQ (Single Correct Answer)
+1
-0.3
The drawing shows a machined shaft. The purpose of providing rounded grooves at $$M$$ and $$N$$ is to GATE PI 2003 Machine Tools and Machining - Machining Question 21 English
A
Supply lubricating oil for bearing mounting
B
Facilitate facing operation
C
Facilitate grinding of bearing mounting surface
D
Reduce stress concentration
EXAM MAP