Drilling and Reaming MCQ 1
Q.1) A cutting tool used to finish and enlarge a hole is known as
Drill
Tap
Die
Reamer
Correct answer- (D)
Q.2) Which one of the following metals does not require any coolant during reaming?
Aluminium
Cast iron
Copper
Steel
Correct answer- (B)
Q.3) The grooves provided on the entire length of the body of a twist drill are called
lips
flutes
margin
webs
Correct answer- (B)
Q.4) A wedge like tool is used for removing the taper shank tools from the nose of the machine spindle ? What is this called?
Drill chuck
Drill key
Drill socket
Drill drift
Correct answer- (D)
Q.5) A hole, which is not made through full depth of the component is known as
core hole
blind hole
pin hole
bore hole
Correct answer- (B)
Q.6) The drill sleeves or sockets are available with morse taper and their number range MT-1 to MT-6. Which one of the following drill sizes refers to MT-4 ?
Drills above 14 mm upto 23 mm
Drills above 23 mm upto 31.75 mm
Drills above 31.75 mm upto 50.50 mm
Drills above 50.50 mm upto 76 mm
Correct answer- (C)
Q.7) A drilled hole goes out of centre due to
improper clamping of workpiece
workpiece having blow holes
centre punch mark not being large enough to give proper seat to the chisel edge of drill
any one of the above
Correct answer- (D)
Q.8) Which one of the following coolants is used for reaming aluminium workpiece?
Kerosene
Water
Air pressure
Lard oil
Correct answer- (A)
Q.9) A Ø 6H7 hole is to be reamed in a steel workpiece. What size of drill will be required?
5.5 mm
5.8 mm
6.0 mm
6.2 mm
Correct answer- (B)
Q.10) The point angle of twist drill depends upon the
cutting speed
type of drilling machine
size of the drill
material to be drilled
Correct answer- (D)
Q.11) The point angle of twist drill for general purposes is *
4 points
135°
118°
90°
60°
Correct answer- (B)
Q.12) The relief angle given behind the cutting lips is called
lip clearance angle
helix angle
rake angle
chisel edge angle
Correct answer- (A)
Q.13) A hole of 10 mm diameter is to be finished with a hand reamer. The hole size required for reaming should be
9.75 mm
9.50 mm
9.25 mm
9.00 mm
Correct answer- (A)
Q.14) The process of enlarging the end of an existing hole to accommodate the head of socket screw is called
spot-facing
boring
counter-boring
counter-sinking
Correct answer- (C)
Q.15) The process of beveling the end of existing hole is called
spot-facing
boring
counter-boring
counter-sinking
Correct answer- (D)
Q.16) The taper shank drills should be removed from the machine spindle by means of
hammer
tang of file
punch
drift
Correct answer- (D)
Q.17) Drill chucks are held on the machine spindle by means of
arbor
drift
draw-in bar
chuck nut
Correct answer- (A)
Q.18) Drill sleeve is used when the taper shank of the drill is
smaller than the machine spindle
larger than the machine spindle
equal to the machine spindle
None of the above
Correct answer- (A)
Q.19) The lip clearance angle of twist drill for general purpose should be
3° to 5°
4° to 8°
8° to 12°
12° to 15°
Correct answer- (D)
Q.20) The suitable cutting fluid for drilling M.S. plate is
soluble oil
water
compressed air
dry
Correct answer- (A)
Q.21) The distance a drill advances into the job in one complete revolution is known as
r.p.m.
cutting speed
feed
machine speed
Correct answer- (C)
Q.22) Which one of the following is used to hold the straight shank drill having diameter less than 12 mm ?
Sleeve
Socket
Drill chuck
Drill drift
Correct answer- (C)
Q.23) The rate of feed depends upon
finish required
material of tool (drill)
material to be drilled
all the above
Correct answer- (D)
Q.24) Which among the following is NOT the factor for selection of cutting speed and feed for reaming a hole with a machine reamer?
Material of the job.
Material of the reamer.
Diameter (size) of the reamer.
Rigidity of the fixture.
Correct answer- (D)
Q.25) A nut is to be made for a screw of M 10 x 1.5. What should be the size of drilled hole?
8.5 mm
9.0 mm
9.5 mm
10.0 mm
