Multiple Choice Questions (MCQ) On Lathe Machine - Set 06 - ObjectiveBooks

Multiple Choice Questions (MCQ) On Lathe Machine - Set 06

Practice Test: Question Set - 06


1. Which one of the following is the correct position of threading tool to cut V-thread?
    (A) Exactly at center height of the workpiece with tool axis perpendicular to the workpiece axis
    (B) Exactly at center height of the workpiece with tool axis at 60° to the workpiece axis
    (C) Exactly at center height of the workpiece with tool axis at 45° to the workpiece axis
    (D) Exactly at center height of the workpiece with tool axis at 30° to the workpiece axis

2. Which one of the following centers is suitable while cutting taper by set over method?
    (A) Plain center
    (B) Half center
    (C) Ball center
    (D) Revolving center

3. Back-gear mechanism is provided in cone pulley headstock to
    (A) Reduce the speed of spindle
    (B) Increase the speed of spindle
    (C) Reverse the speed of spindle
    (D) Transmit power from spindle gear to stud gear

4. When the tailstock is offset for taper turning, the center line of the tailstock is
    (A) Inclined with the lathe bed at an angle equal to the angle of taper required
    (B) Inclined with the lathe bed one half of the angle of taper required
    (C) Still parallel with the lathe bed
    (D) Either 'A' or 'B'

5. A follower steady consists of
    (A) One pad
    (B) Two pads
    (C) There pads
    (D) Four pads

6. Which taper is used on spindle nose of the lathe headstock?
    (A) Jarno taper
    (B) Brown and Sharpe taper
    (C) Pin taper
    (D) Morse taper

7. The sliding surface of the lathe bed is
    (A) Flame hardened
    (B) Case hardened
    (C) Normalized
    (D) Tempered

8. In an open-side tool post
    (A) Single tool post is held with 3 bolts
    (B) Single tool is held with 1 bolt
    (C) Two tools are held with 3 bolts
    (D) Two tools are held with 1 bolt

9. Which among the following statements in respect of fixed steady is NOT correct?
    (A) When setting its two lower pads are made to just touch the surface of the job first
    (B) It must be trued before the pads to bear on the job
    (C) Skinning is done on the job before it is set with the job
    (D) It is fixed to the carriage of the lathe

10. Which one of the following is the reason for torn threads while thread cutting on lathe?
    (A) Blunt tool
    (B) Heavy depth of cut
    (C) Insufficient side clearance
    (D) Any of the above

11. Which among the following statements in respect of chip breaker is correct?
    (A) Chip breakers are essential for breaking the long continuous chips into small pieces
    (B) Chip breakers are necessary to break the chips to protect the finished work surfaces
    (C) Chip breakers are provided to curl and break the chips
    (D) All the above

12. The width of the tool used to cut 10 mm pitch square thread is
    (A) 10 mm
    (B) 7.5 mm
    (C) 5 mm
    (D) 2.5 mm

13. The included angle of the countersinking portion of a centre drill of type 'B' used for protecting the centre hole is
    (A) 75°
    (B) 90°
    (C) 100°
    (D) 120°

14. The tailstock barrel has an internal taper. Which one of the following standard tapers is provided in the barrel bore?
    (A) Metric taper
    (B) Morse taper
    (C) Jarno taper
    (D) Brown and Sharpe taper

15. Taps are surface treated to
    (A) Improve the appearance
    (B) Improve the wear resistance property
    (C) Prevent them from getting corroded
    (D) Be used only on automatic threading machines

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