Drilling and Reaming ITI Objective Questions - ObjectiveBooks

Drilling and Reaming ITI Objective Questions

Practice Test: Question Set - 03


1. During drilling it is observed that chip is flowing out continuously through one lip only. The possible reason is:
    (A) Unequal lip angle
    (B) Excessive point angle
    (C) Unequal clearance angle
    (D) Cutting angle is not according to the metal being drilled

2. A hole which is not made through full depth of the component is known as
    (A) Core hole
    (B) Blind hole
    (C) Pin hole
    (D) Bore hole

3. The point angle of twist drill depends upon the
    (A) Cutting speed
    (B) Type of drilling machine
    (C) Size of the drill
    (D) Material to be drilled

4. The process of enlarging the end of an existing hole to accommodate the head of socket screw is called
    (A) Spot-facing
    (B) Boring
    (C) Counter-boring
    (D) Counter-sinking

5. What will be the result if the clearance angle in drill is increased?
    (A) Poor wedging action
    (B) Weak cutting edge
    (C) Rough hole surface
    (D) Increased point angle

6. The taper shank drills should be removed from the machine spindle by means of
    (A) Hammer
    (B) Tang of file
    (C) Punch
    (D) Drift

7. The suitable cutting fluid for drilling M.S. plate is
    (A) Soluble oil
    (B) Water
    (C) Compressed air
    (D) Dry

8. Which among the following factors will NOT influence the selection of the cutting speed while performing operation on drilling machine?
    (A) Width of job
    (B) Material of job
    (C) Material of tool
    (D) Operation to be performed

9. The angle of drill grinding gauge is
    (A) 59°
    (B) 118°
    (C) 121°
    (D) 124°

10. Which one of the following drilling machines is used for drilling holes where electricity is not available?
    (A) Bench drilling machine
    (B) Pillar drilling machine
    (C) Radial drilling machine
    (D) Ratchet drilling machine

11. A nut is to be made for a screw of M10 × 1.5. What should be the size of drilled hole?
    (A) 8.5 mm
    (B) 9.0 mm
    (C) 9.5 mm
    (D) 10.0 mm

12. Which is the possible cause when a twist drill produces a rough hole on the job?
    (A) The clearance angle is too big
    (B) The clearance angle is too small
    (C) The cutting speed is too low
    (D) Feed rate is too high

13. A Dia 6H7 hole is to be reamed in a steel workpiece. What size of drill will be required?
    (A) 5.5 mm
    (B) 5.8 mm
    (C) 6.0 mm
    (D) 6.2 mm

14. Counter-boring is done for
    (A) Deburring hole ends
    (B) Enlarging the hole to accurate size
    (C) Finishing the cored hole
    (D) Accommodating socket head screws

15. Which one of the following operations can be used for removing burrs formed at the edge of the hole while drilling?
    (A) Countersinking
    (B) Counter-boring
    (C) Spot-facing
    (D) Chamfering by filing

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