Q.1) The part of the reamer which allows the chips to pass and admit the coolant to the cutting edge is called
tang
neck
flute
land
Q.2) While drilling, the drill gets over-heated. This is due to
more lip clearance angle
less cutting angle
excessive cutting pressure
the material being drilled is ductile
Q.3) During drilling, the feed rate is expressed in............
RPM
mm/rev
mm/min
degree
Q.4) The point angle of drill bit depends on the
size of the drill
type of machine
the material of the workpiece
rpm of the drill
Q.5) What is the function of part "pilot" provided in reamers?
Finish concentric holes
Removing chips
Hold in a tap wrench
Hold in the machine spindle
Q.6) Twist drills are made with different helix angles, the helix angle determines .....
Clearance angle
Cutting angle
Rake angle
Lip angle
Q.7) Which one of the following is NOT a type of drill shank?
straight shank
taper shank
oval shank
square taper shank
Q.8) Why is land or margin provided on twist drill?
To control the size of drill
To give clearance to the body of the drill
To keep the drill in alignment while drilling
all of the above
Q.9) When is drilling said to be deep hole drilling?
When the depth of the hole to be drilled is more than five times the size of the drill.
When the depth of the hole to be drilled is more than four times the size of the drill.
When the depth of the hole to be drilled is more than three times the size of the drill.
When the depth of the hole to be drilled is more than two and a half times the size of the drill.
Q.10) Which among the following factors will NOT influence the selection of the cutting speed while performing an operation on the drilling machine?
Width of job
Material of job
Material of tool
The operation to be performed
Q.11) The reamer teeth and spacing are designed to assist in reaming more accurate holes with good surface finish. Which one of the following is true regarding the number of teeth and their spacing?
The uneven number of teeth and uneven spacing
The uneven number of teeth and even spacing
Even the number of teeth and uneven spacing
Even the number of teeth and even spacing
Q.12) The angle of drill grinding gauge is
59°
118°
121°
124°
Q.13) The taper shank of a drill of 20 mm diameter has
MT-1 taper
MT-2 taper
MT-3 taper
MT-4 taper
Q.14) A short reamer with an axial hole used with an arbor or mandrel is called
parallel reamer
adjustable reamer
expansion reamer
chucking reamer
Q.15) The material of twist drill is generally
H.S.S.
Carbide steel
Diamond
Cast steel
Q.16) Which one the following drilling machines is used for drilling holes where electricity is not available?
Bench drilling machine
Pillar drilling machine
Radial drilling machine
Ratchet drilling machine
Q.17) Which of the following reamers is particularly suitable for reaming holes having keyway grooves?
Straight fluted reamer
Helical fluted reamer
Taper Reamer
Pilot reamer
Q.18) Which one the following reamers can adjust itself in case of slight misalignment when fitted on a tailstock?
Parallel reamer
Taper Reamer
Adjustable reamer
Floating reamer
Q.19) How does a hand reamer differ from a machine reamer?
Larger bevel lead for the cutting edges
More number of cutting teeth
Less number of cutting teeth
The unequal spacing of cutting edges
Q.20) Which one of the following machine reamers are used to correct the misalignment between the reamer axis and the work axis?
Floating blade reamer
Shell reamer
Machine jig reamer
Chucking Reamer
Q.21) Counter-boring is done for
deburring hole ends
Enlarging the hole to accurate size
Finishing the cored hole
Accommodating socket head screws
Q.22) Which is the possible cause when a twist drill produces a rough hole on the job?
The clearance angle is too big
The clearance angle is toó small
The cutting speed is too small
Feed rate is too high
Q.23) Which angle of countersink drill you will select for seating countersink type A (IS — 3406-1986)?
Countersink drill 75°
Countersink drill 80°
Countersink drill 90°
Countersink drill 120°
Q.24) What will be the result if the clearance angle in the drill is increased?
Poor wedging action.
Weak cutting edge
Rough hole surface
Increased point angle
Q.25) A reamed hole has patches of the poor finish. Which one of the following is the cause for this defect?
The bored hole has an insufficient reaming allowance.
Excessive cutting speed.
Wrong selection of the reamer for the job.
Insufficient coolant supply.
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