WorksheetsIII SEM - PRODUCTION TECHNOLOGY
Total questions: 35
Worksheet time: 18mins
Name
Class
Date
1.
Formula for cutting speed V= .
a)
ПDN/1000<br />m/min
b)
ПD2N/1000<br />m/min
c)
ПDN2/1000<br />m/min
d)
П2DN/1000<br />m/min
2.
unit of cutting speed is
a)
m²/min
b)
m/h
c)
mm/sec
d)
m/min
3.
profile griding in a profile grinder is usally done by
a)
hand grinding
b)
dry grinding
c)
wet grinding
d)
none
4.
In standard marking system of grinding wheel, 23-A52K10S25 'K'<br />denotes
a)
Abrasive
b)
Grade
c)
Grain Size
d)
Bond Type
5.
The amount of bond present between individual abrasive grain is indicated by
a)
Grade
b)
Structure
c)
Grain
d)
None
6.
Which of the following is an artificial abrasive?
a)
Sand stone
b)
Emery
c)
Al2O3
d)
Diamond
7.
For high speed grinding operations, which type of grinding wheels<br />are suggested?
a)
Vitrified<br />bond
b)
Shellac bond
c)
Rubber bond
d)
Resionoid bond
8.
If the cutting edges become glass like appearance it is called as
a)
Truing
b)
Dressing
c)
Loading
d)
Glazing
9.
Star dresser is commonly used for grain abrasive
a)
Rough grain
b)
coarse grain
c)
fine grain
d)
very grain
10.
machining time in surface grinding is calculated by the<br />formula
a)
lpk/s n
b)
πdn/1000
c)
1000 V/πd
d)
ls Tmax
11.
resharpening of milling cutters are usually done by
a)
surface grinder
b)
tool&cutter<br />grinder
c)
hand gringer
d)
pedestal<br />gringer
12.
Broaches are made out of
a)
MS
b)
HSS
c)
EN8
d)
HCS
13.
is a material cutting process combining both roughing and finishing in one pass by means of a cutting tool known as broach
a)
Milling
b)
Grinding
c)
broaching
d)
tapping
14.
The process of enlarging predrilled hole is .
a)
Milling
b)
Grinding
c)
Tapping
d)
Boring
15.
The most accurate manufacturing process is
a)
Honing
b)
Grinding
c)
Lapping
d)
Milling
16.
is an abrading processes that is used to produce geometrically true surfaces to improve dimensional accuracy
a)
lapping
b)
Honing
c)
Super finishing
d)
burnishing
17.
Most lapping is done by means of lapping shoes called
a)
laps
b)
Honing
c)
burnishing
d)
glazing
18.
is a abrading process mostly used for finishing round holes
a)
Honing
b)
Lapping
c)
burnishing
d)
Surface finishing
19.
The process of precision grinding with loose dust type abrasive is
a)
Honing
b)
Super finishing
c)
Lapping
d)
None of the above
20.
lapping is done by using
a)
kerosene &emery<br />paper
b)
kerosene&lap ping paste
c)
water&lappin g paste
d)
none
21.
Wire EDM is used to produce a .
a)
Blind hole
b)
Through hole
c)
both a and b
d)
Irregular<br />blind hole
22.
In EDM the required property of the tool is
a)
Resistivity
b)
conductivity
c)
Die electric<br />strength
d)
none of<br />these
23.
EDM is mainly used to produce which types of profile
a)
thru
b)
blind
c)
both a and b
d)
none of<br />these
24.
In EDM the amount of burr produce is
a)
high
b)
low
c)
nil
d)
none of<br />these
25.
Dielectric used in EDM is
a)
kerosene
b)
petrol
c)
diesel
d)
water
26.
The wear on electrode during sparking compared to other non- conventional machining will be
a)
minimum
b)
maximum
c)
medium
d)
nil
27.
The technical name used for the distance between the electrode and work piece when spark occurs is
a)
spark
b)
spark gap
c)
clearance
d)
side gap
28.
Which is the most popular electrode material & probably easiest to machine
a)
graphite
b)
copper
c)
MS
d)
tongsten
29.
Sparking is kind of operation
a)
finishing
b)
semifinishing
c)
roughing
d)
all of these
30.
Wire cut EDM is also known as
a)
Wire<br />erosion
b)
Erosion
c)
Spark erosion
d)
Retreating
31.
Pressure applied to the materials to force it through the spark gap is
a)
Flushing pressure
b)
sparking pressure
c)
EDM<br />pressure
d)
Gap pressure
32.
Which of the following is not an advantage of EDM
a)
Hardened substance can be<br />machined
b)
Burr free operation
c)
Stress free operation
d)
Costly in machining
33.
Which of the following is not the property of dielectric fluid used in EDM
a)
Viscosity<br />should be low
b)
It should be<br />chemically neutral
c)
It should act<br />as good lubricant
d)
Low flash point
34.
Sparking operation is performed .
a)
After heat<br />treatment
b)
before heat<br />treatment
c)
Either A or B
d)
None
35.
property of electrode is
a)
good electrical conductor
b)
high resistence
c)
low melting point
d)
non conductor
100 %
