1) The abrasive used for honing the non-ferrous metal is ................
Silicon carbide
Boron carbide
Diamond
Aluminium oxide
Correct answer
Silicon carbide
2) The carbon content range in high carbon steel is ........................
0.7% to 1.4%
2.1% to 2.75%
O.1% to 0.3%
O.3% to 0.7%
Correct answer
0.7% to 1.4%
3) Which one of the following ferrous metals cannot be melted into a liquid state?
Pig iron
Steel
Wrought iron
Cast iron
Correct answer
Steel
4) Gunmetal is an alloy of ..................
copper, zinc, and lead
zinc, lead, and tin
copper, lead and tin
copper, tin, and zinc
Correct answer
copper, tin, and zinc
5) Brass is an alloy of ........................
Copper and zinc
Lead and tin
Copper and tin
Copper and lead
Correct answer
Copper and zinc
6) The flank angle and the form of fine screw thread can be checked by using ....................
thread micrometer
optical projector
plug gauge
snap gauge
Correct answer
optical projector
7) After threading a hole by a tap, it was found that the crest of the thread was not formed completely. This defect is due to .................
Broken the tip of cutting edge of the tap
Insufficient coolant supply.
Hole size slightly more than the tap drill size.
Hole size slightly less than the tap drill size.
Correct answer
Hole size slightly more than the tap drill size.
8) Die and die stock is shown in Fig. Name the die stock.
Plain die stock
button die stock
adjustable screw plate die stock
quick cut stock
Correct answer
button die stock
9) The angle of the British Standard Whitworth thread is ..............
45°
47½°
55°
60°
Correct answer
55°
10) Name the tool shown in Figure.
finishing reamer
chucking reamer
solid hand reamer
rose reamer
Correct answer
solid hand reamer
11) Name the gauge used for checking the ‘V’ threading tool.
Template
Centre gauge
Drill gauge
Pitch gauge
Correct answer
Centre gauge
12) The recommended cutting angle of a flat scraper is in between
75° to 80°
70° to 75°
85° to 90°
80° to 85°
Correct answer
70° to 75°
13) The half round scraper cutting angle is in between
30° to 35°
35° to 40°
40° to 45°
45° to 65°
Correct answer
35° to 40°
14) The least count of a vernier metric micrometer is .....................
0.1 mm
0.0001 mm
0.001 mm
0.01 mm
Correct answer
0.001 mm
15) Vernier micrometer have additional equally spaced graduations (vernier graduators) given above the datum line
12 equally spaced line
8 equally spaced line
14 equally spaced line
10 equally spaced line
Correct answer
10 equally spaced line
16) The measurement in a dial test indicated is
the difference between the steps of 5mm
the direct reading of the dimensions
the actual size of the component
the magnified small variation in sizes through a pointer
Correct answer
the magnified small variation in sizes through a pointer
17) The principle of working of a dial test indicator is
the linear motion is converted into a rotary motion using rack and pinion
magnification of small variation using lenses
the linear motion is converted into a reciprocating motion, using the slotted link
magnification by electronic means
Correct answer
the linear motion is converted into a rotary motion using rack and pinion
18) The lever type dial test indicator works with the principle of
level and scroll
Rack and pinion
slide rule
sliding movement
Correct answer
level and scroll
19) Which one of the following cutting fluids is used during grinding mild steel?
Mineral oil
Nonsynthetic cutting oil
Soluble oil
Paraffin
Correct answer
Soluble oil
20) Which one of the following refers to the term tool life?
The duration of time before a tool breaks when continuously fed while machining.
The total number of pieces a tool can produce.
The total machining time a cutting tool can withstand between two successive grinding.
The length of time a cutting tool can be used after several grindings.
Correct answer
The length of time a cutting tool can be used after several grindings.
21) The pointer of Plunger type dial indicator points to 52 divisions on the dial and its revolution counter shows 2 divisions. Least count of the instrument is 0.01 mm. The value of reading is ..........
5.4 mm
2.52 mm
5.2 mm
0.54 mm
Correct answer
2.52 mm
22) Feed of the tool in turning is expressed in .................
m/min
cm/rev
mm/rev
mm/min
Correct answer
mm/rev
23) Which one is not the advantage of the preventive maintenance system?
less downtime
reduction of unexpected breakdowns
lower the unit cost manufacture
more downtime
Correct answer
more downtime
24) Manufacturers manual contains all the necessary details for lubricated parts in machine tools. Lubricants are applied daily, weekly, monthly or at regular intervals? Which symbols are used for monthly lubrication?
square
circle
hexagon
triangle
Correct answer
circle
25) The cutting tool material should possess a certain quality. The ability of the tool material to retain most of the cold hardness property even at very high temperature is termed as
brittleness
cold hardness
red hardness
toughness
Correct answer
cold hardness
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