1. The chip breaker on a lathe tool is essential when ?

turning soft material

turning ductile materials and to break the chips

turning cast iron

turning hardened material

Answer: turning ductile materials and to break the chips

Explanation:


2. When rough turning a work peace with a carbide tool long curly chips are formed. Which one of the following is the right way of getting rid of this kind of chip ?

stop the power feed at intervals so that the chip break

change the rake angle

provide chip breaker on the tool

use a metal hook and pull away the chips

Answer: provide chip breaker on the tool

Explanation:


3. Assume that front clearance angle of a lathe tool 8 degree and top rake is 15 degree. Then the wedge angle is ?

15°

23°

67°

90°

Answer: 67°

Explanation:


4. When a tool set the Above the centre, the ?

top rake angle increases

top rake angle decreases

top rake angle not change

top rake angle becomes negative

Answer: top rake angle increases

Explanation:


5. Which range of cutting speed is set for turning a mild steel using a HSS tool ?

15-20 m/min

35-50 m/min

50-80 m/min

70-100 m/min

Answer: 35-50 m/min

Explanation:


6. The tool made of HSS wears out faster at _______________ ?

normal speed

slow speed

medium speed

high speed

Answer: high speed

Explanation:


7. When the tool of centre lathe moves the parallel to the axis of rotation ?

it produces a taper surface

it produces a cylindrical surface

it produces a flat surface

none of the above

Answer: it produces a cylindrical surface

Explanation:


8. The carbide made workpiece need to be machined, what rake angle you will be use in lathe tool ?

positive

negative

zero

none of the above

Answer: negative

Explanation:


9. When the tool of centre lathe moves the perpendicular of the axis of rotation ?

it produces a taper surface

it produces a cylindrical surface

it produces a flat surface

none of the above

Answer: it produces a flat surface

Explanation:


10. The angle made by the face of the tool and the plane parallel to the base of cutting tool is called ?

rake angle

clearance angle

lip angle

cutting angle

Answer: rake angle

Explanation: