Lathe Operations Interview Questions and Answers - Set 05 - ObjectiveBooks

Lathe Operations Interview Questions and Answers - Set 05

Practice Test: Question Set - 05


1. Fine facing is done by feeding the tool
    (A) From centre to the periphery of the job
    (B) From periphery to the centre of the job
    (C) Either 'A' or 'B'
    (D) Neither 'A' nor 'B'

2. The difference in measurement between the machined and un-machined diameter is equal to the
    (A) Depth of cut
    (B) 1/2 depth of cut
    (C) 2 × depth of cut
    (D) None of the above

3. An angular workpiece is to be faced. It should be mounted
    (A) In a three-jaw chuck
    (B) In a Collet
    (C) Between centers
    (D) On a face plate

4. The taper of a job is given 1:10, the length of taper is 150 mm and the total length is 200 mm. The tailstock offset should be
    (A) 15 mm
    (B) 10 mm
    (C) 7.5 mm
    (D) 5 mm

5. For setting of tool for threading, it is aligned with the work by using
    (A) Try square
    (B) Centre gauge
    (C) Thread plug gauge
    (D) Template

6. If the pitch to be cut is 2.5 mm and the lathe has 5 mm pitch lead screw, the thread chasing dial has 8 divisions and a 16 teeth worm wheel fitted on it, the engagement of half nut should be
    (A) Only at one particular position
    (B) Only at numbered or un-numbered division
    (C) At opposite position
    (D) Anywhere

7. Which among the following statements is correct?
    (A) During turning, after giving one depth of cut, the diameter is reduced equal to double the depth
    (B) Carbide tipped tool can withstand shock load
    (C) When turning bigger diameter job, the rpm is proportionally increased
    (D) When turning smaller diameter job, the rpm is proportionally decreased

8. Which one of the following is true with respect to the principle of taper turning attachment?
    (A) Work axis is parallel to lathe axis and tool is made to move parallel to the work axis
    (B) Work axis is parallel to lathe axis and the tool is made to move at an angle to the work axis
    (C) Work axis is out of alignment with the lathe axis and the tool is made to move at an angle to the work axis
    (D) Work axis is out of alignment with the lathe axis and the tool is made to move at an angle parallel to the lathe axis

9. Which one of the following operations is NOT done on a workpiece held in-between centers?
    (A) Knurling
    (B) Undercutting by plunging
    (C) Thread cutting
    (D) Parting off

10. Unusual sound is heard during rough boring a large diameter hole. Which one of the following statements is the cause for this defect?
    (A) Boring tool springs its travel
    (B) Coolant is not applied with force
    (C) Tool set below centre
    (D) No secondary clearance ground on the front cutting edge

11. Chip breakers are meant to break continuous long chips. Which one of the following types of chip breaker is found on a throw away insert with holder?
    (A) Piece of sheet metal clamped to the holder in the path of the coil
    (B) A step is ground on the throw away insert along the cutting edge
    (C) A small groove ground at the cutting edge
    (D) A carbide bit is screwed and held on the top face of the bit

12. When cutting ISO metric threads of coarse pitch, the compound rest should be swiveled to
    (A) 15°
    (B) 30°
    (C) 45°
    (D) 60°

13. A carbide tipped tool with blue marking is used on a lathe. Which one of the following materials can be machined with this tool?
    (A) Brass
    (B) Steel
    (C) Plastic
    (D) Grey cast iron

14. Which one of the following is a remedial measure to prevent the tool cutting edge chipping off?
    (A) Increase feed rate
    (B) Reduce cutting speed
    (C) Decrease nose radios
    (D) Use negative top rake

15. Hand chasers are used for
    (A) Quick production of threads
    (B) Cutting threads on soft metal directly
    (C) Rectifying threads cut on steel rods which are distorted
    (D) Rectifying crest and root of threads formed by single point tool

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