1.
Internal gears can be made by
a)
hobbing
b) shaping with a pinion cutter
c)
shaping with rack cutter
d)
milling
2.
The swing diameter over the bed is __________
the height of the centre measured from the bed of the lathe.
a)
equal to
b) twice
c)
thrice
d)
one-half index change gear ratio
3.
If the diameter of the hole is subject to
considerable variation, then for locating in jigs and fixtures, the pressure
type of locator used is
a) conical locator
b)
cylindrical locator
c)
diamond pin locator
d)
vee locator
4.
Segmental chips are formed during machining
a)
mild steel
b) cast iron
c)
high speed steel
d)
high carbon steel
5.
The silicon carbide abrasive is chiefly used for
grinding
a)
cemented carbide
b)
ceramic
c)
cast iron
d) all of these
6.
Drilling is an example of
a)
orthogonal cutting
b) oblique cutting
c)
simple cutting
d)
uniform cutting
7.
When the cutting edge of the tool is dull, then
during machining
a)
continuous chips are formed
b)
discontinuous chips are formed
c) continuous chips with built-up edge are
formed
d)
no chips are formed
8.
Cast iron during machining produces
a)
continuous chips
b) discontinuous chips
c)
continuous chips with built-up-edge
d)
none of these
9.
A single-point thread cutting tool should
ideally have
a) zero rake angle
b)
positive rake angle
c)
negative rake angle
d)
point angle.
10.
The work or surface speed for cylindrical
grinding varies from
a)
5 to l0 m/min
b)
10 to 20 m/min
c) 20 to 30 m/min
d)
40 to 60 m/min
11.
The tool made of cemented carbide wears out
faster at
a) slow speeds
b)
medium speeds
c)
fast speeds
d)
very fast speeds
12.
The cutting tool in a milling machine is mounted
on
a)
spindle
b) arbor
c)
column
d)
knee
13.
A push broach as compared to a pull broach
a)
has less number of teeth
b)
is short and stocky
c)
removes less material for each pass of the tool
d) all of the above
14.
Twist drills are made of
a)
high speed steel
b)
carbon steel
c)
stainless steel
d) either (a) or (b)
15.
A twist drill is a
a)
side cutting tool
b) front-cutting tool
c) end cutting tool
d)
none of these
16.
The rake angle required to machine brass by high-speed steel tool ¡s
a) 0°
b)
10°
c)
20°
d)
-10°
17.
The lip angle of a single-point tool is usually
a)
20°to4O°
b)
400 to 60°
c) 60° to 80°
d)
none of these
18.
The average cutting speed for turning brass with
a high-speed steel tool is
a)
15 to 19 m/mm
b)
25 to 31 m/mm
c) 60 to 90 m/mm
d)
90 to 120 m/mm
19.
The maximum production of small and slender
parts is done by
a)
watch maker’s lathe
b)
sliding head stock automatic lathe
c) Multi-spindle automatic lathe
d)
capstan lathe
20.
The method of grinding used to produce a
straight or tapered surface on a work piece, is
a)
internal cylindrical grinding
b)
form grinding
c) external cylindrical grinding
d) surface grinding
21.
Crater wear occurs mainly on the
a)
nose part, front relief face, and side relief
face of the cutting tool
b) face of the cutting tool at a short
distance from the cutting edge only
c)
cutting edge only
d)
front face only
22.
Gear lapping is an operation
a) after heat treatment
b)
prior to heat treatment
c)
for gear reconditioning
d)
none of these
23.
The facing is an operation of
a)
beveling the extreme end of a work piece
b)
embossing a diamond-shaped pattern on the
surface of a work piece
c)
reducing the diameter of a work piece over a
very narrow surface
d) machining the ends of a work piece to
produce a flat surface square
with
the axis
24.
A fixture is defined as a device which
a)
holds and locates a work piece and guides and
controls one or more cutting tools
b) holds and locates a work piece during an
inspection or for a manufacturing operation
c)
is used to check the accuracy of work piece
d)
all of the above
25.
A drill considered as a cutting tool having zero
rake, is known as a
a)
flat drill
b) straight fluted drill
c)
parallel shank twist drill
d)
tapered shank twist drill
26.
Larger end cutting edge angle __________ tool
life.
a)
increases
b) decreases
c)
does not effect
d)
none of these
27.
The lead screw of a lathe has threads.
a) single start
b)
double start
c)
multi-start
d)
any one of these
28.
A left-hand tool on a lathe cuts most
efficiently when it travels
a) from left to right end of the lathe bed
b)
from right to the left end of the lathe bed
c)
with the help of a compound slide
d)
across the bed
29.
The correct sequence of tool materials in
increasing order of their ability to retain their hot hardness is
a)
carbide, ceramic, cermet, borazon
b)
ceramic, carbide, borazon, cermet
c) cermet, carbide, ceramic, borazon
d)
borazon, ceramic, carbide, cermet
30.
Surface grinding is done to produce
a)
tapered surface
b) flat surface
c)
internal cylindrical holes
d)
all of these
31.
In up milling, the thickness of the chip is
a) minimum at the beginning of the cut and
maximum at the end of the cut
b)
maximum at the beginning of the cut and minimum
at the end of the cut
c)
uniform throughout the cut
d)
none of these.
32.
The machining of titanium is difficult due to
a)
high thermal conductivity of titanium
b)
chemical reaction between tool and work
c) low tool-chip contact area
d)
none of these
33.
The different spindle speeds on a lathe form
a)
arithmetical progression
b) geometrical progression
c)
harmonical progression
d)
any one of these
34.
In hot machining, the tool is made of
a) tungsten carbide
b)
brass or copper
c)
diamond
d)
stainless steel
35.
In ultra-sonic machining, the metal is removed
by
a) using abrasive slurry between the tool and
work
b)
direct contact of the tool with the work
c)
maintaining an electrolyte between the work and
tool in a very small gap between the two
d)
erosion caused by rapidly recurring spark
discharges between the tool and work
36.
Grinding wheels should be tested for balance
a)
only at the time of manufacture
b)
before starting the grinding operation
c)
at the end of the grinding operation
d) occasionally
37.
The example of snag grinding is
a)
trimming the surface left by sprues and risers
on castings
b)
grinding the parting line left on castings
c)
removing flash on forgings
d) all of these
38.
Which of the following parameters influence the
axial feed rate in centre less grinding?
a)
Regulating wheel diameter
b)
Speed of the regulating wheel
c)
Angle between the axes of grinding and
regulating wheels
d) all of the above
39.
The lathe spindles are usually made hollow and
provided with
a) internal taper
b)
external taper
c)
internal and external taper
d)
no taper
40.
The top and sides of the table of a shaper
usually have
a)
L-type slots
b) T-type slots
c)
l-type slots
d)
any one of these
41.
The binding material used in cemented carbide
tools is
a)
tungsten
b)
chromium
c)
silicon
d) cobalt
42.
In machining metals, chips break due to
__________ of work material.
a)
toughness
b)
ductility
c)
elasticity
d) work hardening
43.
Which of the following statement is correct
regarding grinding high-carbon steel?
a)
Grinding at high-speed results in the reduction
of chip thickness and cutting forces per grit.
b)
Aluminium oxide wheels are employed.
c)
The grinding wheel has to be of an open structure.
d) all of the above