1)
19.978
19.970
19.993
19.980
Correct answer
19.980
2) Three square scrapers is used for scraping ................
bearing surfaces
large flat surfaces
small diameter holes
large diameter holes
Correct answer
small diameter holes
3) What is the drill point angle for general purpose?
118°
112°
108°
110°
Correct answer
118°
4) The difference between the maximum limit of size and the minimum limit of size is called ..................
tolerance
actual size
upper deviation
lower deviation
Correct answer
tolerance
5) Wrought iron is produced in ..............
electric arc furnace
puddling furnace
cupola furnace
blast furnace
Correct answer
puddling furnace
6) Brass is an alloy of ..............
copper and lead
lead and tin
copper and tin
copper and zinc
Correct answer
copper and zinc
7) While drilling, the drill gets over-heated. This is due to ..............................
less cutting angle
the material being drilled is ductile
excessive cutting pressure
more lip clearance angle
8) Name the accessory used in the drilling machine shown in the figure.
Socket
Tool holder
Chuck
Sleeve
Correct answer
Socket
9) A plug gauge is used for checking .......
screw threads
cylindrical bores
spherical holes
taper bores
Correct answer
cylindrical bores
10) Vernier height gauge is used in conjunction with the .............
surface plate
base plate
angle plate
face plate
Correct answer
surface plate
11) BSW threads have an angle of ................
30°
45°
55°
60°
Correct answer
55°
12) Name the type of machine tap while tapping, the chips are forced out ahead of the tap.
Gun tap
Fluteless spiral pointed tap
Thread forming tap
Helical fluted tap
Correct answer
Fluteless spiral pointed tap
13) Plug tap is used to ...............
start thread
rough thread
quick thread
finish thread
Correct answer
finish thread
14) Double ended adjustable tap wrenches are used for ........
hard material
large diameter
starting thread
fine tapping
Correct answer
large diameter
15) The hole can be checked by ..................
plug gauge
feeler gauge
snap gauge
slip gauge
Correct answer
plug gauge
16) Which type of thread is used in the precision instrument?
Square thread
BA thread
Acme thread
BSW thread
Correct answer
BA thread
17) During drilling, the feed rate is expressed in .......................
mm/rev
degree
mm/min
RPM
Correct answer
mm/rev
18) Organic bonded wheels can withstand...
rough usage
tool room usage
smooth usage
high capacity
Correct answer
rough usage
19) In which gauge GO and NO GO comes in the same end?
Slip gauge
Double ended plug gauge
Snap gauge
Progressive
Correct answer
Progressive
20) Which is the purest form of iron?
Cast iron
Steel
Pig iron
Wrought iron
Correct answer
Wrought iron
21) The product obtained from smelting in the blast furnace is ........
cast iron
wrought iron
pig iron
steel
Correct answer
pig iron
22) The carbon content in wrought iron ranges from ........
O.02% to O.03%
O.02% to O.1%
3% to 4%
0.01 % to 0.05%
Correct answer
O.02% to O.03%
23) Metals ability to withstand scratching, wear, abrasion and penetration property is called ...............
hardness
toughness
ductility
malleability
Correct answer
hardness
24) Which among the following is the best conductor of heat and electricity?
copper
steel
lead
aluminium
Correct answer
copper
25) Name the bond which is used for heavy duty, large diameter wheels where a fine finish is required.
rubber bond
vitrified bond
silicate bond
shellac bond
Correct answer
shellac bond
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