MACHINING ELECTRO DISCHARGE MACHINING MCQS
- Point angle of 135° on drills is used for
- For drilling aluminium, a drill with
- For drilling glass, slate, ceramic and masonry, following drill is used
- When the lip clearance of a drill is too small, i.ewhen it requires resharpening
- The twist drill works by
- The rake angle of single point cutting tool is equivalent to
- For drilling brass, a drill with
- To provide a positive drive, all taper shanked drills are provided with
- If a drill does not cut, the probable cause could be that
- Which portion of a taper shank drill prevents drill from slipping and thus ensures a positive drive ?
- If a drill breaks when drilling a soft and tough material, it could be due to
- To reduce the feeding pressure needed for drilling larger holes, it is a good practice first to
- A drill having flat side and two cutting edges for drilling large holes is called
- Kerosene is a good cutting fluid to use when drilling
- The taper usually employed in drill sleeves is known as
- A taper shank drill is removed from the drill spindle by
- Oversized holes in drilling are caused by
- When the cutting lips of a drill are uneven in length, the drill will cut a
- The flutes of a drill perform the following function
- For reaming operation in blind hole, following type of reamer should be used
- Drills are usually made of
- A boring tool for boring a hole over a large length should have
- The machining process which makes a cone-shaped recess at the top of a drilled hole for a flat head machine screw is called:
- The groove in the body of the drill which allows the chips to come out is known as
- Which is correct statement? A twist drill
- The reamer is always removed from the finished holes
- For reaming copper or soft aluminium, following typee of reamer should be used:
- The operation of providing a smooth seat or bearing surface around a previously drilled hole fora washer or nut is called
- Broken bolts and studs can be removed from hole by the following tool
- The operation of making a recess at the top of a drilled hole for a flat-head machine screw is called
(a) all applications on M.S.
(b) bakelite, hard rubbers and fibrous plastics
(c) hard steels and nickel alloys
(d) thin sheet metal
(e) c) and (d) above.
c) and (d) above.
(a) high helix angle is required
(b) low helix angle is required
(c) any helix angle can be used
(d) zero helix angle is required
(e) none of the above.
high helix angle is required
(a) twist drill
(b) spade bit
(c) tungsten carbide-tipped bit
(d) auger
(e) hardened steel dril.
tungsten carbide-tipped bit
(a) it will drill a bigger hole
(b) it will drill an eccentric hole
(c) it will drill and elliptical hole
(d) it will drill a rough hole
(e) drill will not be able to enter the work.
drill will not be able to enter the work.
(a) being forced through the material
(b) rotating against the material with sufficient pressure to cause it to penetrate the material
(c) rotating against the material and being pulled through by spiral of the flutes
(d) all of the above
(e) none of the above.
rotating against the material with sufficient pressure to cause it to penetrate the material
(a) helix angle of a twist drill
(b) the lip angle of twist drill
(c) end cutting edge angle of a twist drill
(d) the relief angle of a twist drill
(e) none of the above.
helix angle of a twist drill
(a) high helix angle is required
(b) low helix angle is required
(c) any helix angle can be used
(d) zero helix angle is required
(e) none of the above.
low helix angle is required
(a) sleeve
(b) socket
(c) tang
(d) neck
(e) head.
tang
(a) material is hard
(b) speed is low
(c) no lubricant is used
(d) drill is blunt
(e) drill is not mounted properly.
drill is blunt
(a) sleeve
(b) socket neck
(c) tang
(d) flutes.
(e) none of the Above
tang
(a) low speed
(b) blunt drill
(c) hard drill
(d) obstruction of flute of drill by chips
(e) no lubricant.
obstruction of flute of drill by chips
(a) anneal the workpiece
(b) drill a countersunk hole
(c) drill a small pilot hole
(d) drill a stepped hole
(e) mark a centre hole.
drill a small pilot hole
(a) micro-drill
(b) spade drill
(c) boring tool
(d) counter-boring tool
(e) deep hole drill.
spade drill
(a) cast iron
(b) mild steel
(c) aluminium
(d) brass
(e) bronze.
aluminium
(a) Girling taper
(b) Morse taper
(c) Brown and Sharpe taper
(d) 1:1 taper
(e) metric taper.
Morse taper
(a) tapping the drill by a hammer
(b) a screw driver
(c) a draft
(d) a drift
(e) a tang.
a drift
(a) equal lengths of lips
(b) unequal length of lips
(c) larger helix angle
(d) smaller helix angle
(e) wornout drills.
unequal length of lips
(a) larger hole than the drill size
(b) small hole than the drill size
(c) same size hole as the drill size
(d) unpredictable
(e) none of the above.
larger hole than the drill size
(a) help form the cutting edge of the drill point
(b) curb the chip tightly for easier removal
(c) form channels through which the chips can escape firom the hole being drilled
(d) allow the coolant and lubricant to get down to the cutting edge
(e) all of the above.
all of the above.
(a) straight flute reamer
(b) right hand spiral fluted reamer
(c) left hand spiral fluted reamer
(d) any one of the above
(e) none of the above.
right hand spiral fluted reamer
(a) plain high-carbon tool steel
(b) high-speed steel
(c) alloy steel
(d) cast alloys.
(e) tungsten carbide
high-speed steel
(a) one tool bit on a bar
(b) 2 tool bits fitted on diametrically opposite sides of bar
(c) 3 tool bits equally spaced
(d) 4 or more tool bits
(e) none of the above.
2 tool bits fitted on diametrically opposite sides of bar
(a) die-sinking
(b) counter-boring
(c) counter-sinking
(d) taper drilling
(e) spot-facing.
counter-sinking
(a) chip breaker
(b) lip
(c) flute
(d) margin
(e) chip-follower
flute
(a) should not be relied on for accurately sized holes
(b) can be relied on for accurately sized holes
(c) capability for production of accurately sized holes depends on its condition
(d) is most commonly used for production accurately sized holes
(e) none of the above.
should not be relied on for accurately sized holes
(a) by reversing the drill press
(b) by stopping the machine before removing the reameT
(c) by slowing the machine before removing the reamer
(d) before stopping the machine
(e) none of the above.
before stopping the machine
(a) straight flute reamer
(b) right hand spiral fluted reamer
(c) left hand spiral fluted reamer
(d) any one of the above
(e) none of the above.
left hand spiral fluted reamer
(a) counter-boring
(b) boring
(c) spot-facing
(d) counter-sinking
(e) chamfering.
spot-facing
(a) screw driver
(b) Ezy-out
(c) telescopic rod
(d) cold punch
(e) emery rod.
Ezy-out
(a) boring
(b) counter-sinking
(c) micro-boring
(d) reaming
(e) spot-facing.
counter-sinking
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