1
GATE PI 1990
MCQ (Single Correct Answer)
+5
-1.5
A parting tool has a ground front clearance angle of $${6^0}$$ and the back rake angle of $${10^0}$$. The tool, by mistake, was set $$1.5$$ $$mm$$ above the line of centers while machining a job of $$50$$ $$mm$$ out-side diameter.

The diameter of the job at which, while parting, the tool will start rubbing

A
$$35mm$$
B
$$28.7mm$$
C
$$57.4mm$$
D
none
2
GATE PI 1990
Subjective
+5
-0
The following data apply to machining a part on turret lathe and a general purpose lathe GATE PI 1990 Machine Tools and Machining - Metal Cutting Question 24 English

The setup cost and the cost for special tooling on the turret lathe would be $$Rs.3000/-.$$ These costs are negligible on the general purpose lathe. Calculate the batch seize which justifies the use of turret lathe.

3
GATE PI 1990
MCQ (Single Correct Answer)
+1
-0.3
Reamer is designed to have even number of flutes to:
A
Balance the cutting forces
B
Conform to shop floor standard
C
Enable measurement of the reamer diameter
D
Help in regrinding of reamer
4
GATE PI 1990
MCQ (Single Correct Answer)
+2
-0.6
For cutting double start screw threads of pitch $$2.0$$ $$mm$$ on a lathe, the thread cutting tool should have a feed rate of
A
$$0.5$$ $$mm/rev$$
B
$$1.0$$ $$mm/rev$$
C
$$2.0$$ $$mm/rev$$
D
$$4.0$$ $$mm/rev$$
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