1.
In a unilateral system of tolerance, the tolerance is allowed on
A.one side of the actual size
B.one side of the nominal size
C.both sides of the actual size
D
both sides of the nominal size
.
Answer & Explanation
Answer: Option B
2. A two high rolling mill consists of two rolls which rotate
A.at the same speed and in the same direction
B.at the same speed but in opposite direction
C.at different speeds and in the same direction
D
at different speeds and in the opposite direction
.
Answer & Explanation
Answer: Option B
3. Carburising flame is used to weld
A.steel, cast iron, copper, aluminum etc
B.brass and bronze
C.hard surfacing materials such as satellite
D
all of these
.
Answer & Explanation
Answer: Option C
4. The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be
welded)
A.t
B.1.5 t
C.3 t
D
6t
.
Answer & Explanation
Answer: Option A
5. For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank
should be approximately
A.42 mm
B.44 mm
C.46 mm
D
48 mm
.
Answer & Explanation
Answer: Option C
6. Cores are used to
A.form internal cavities in the casting
B.improve mold surface
C.form a part of a green sand mold
D
all of these
.
Answer & Explanation
Answer: Option D
7. The drawing down is a process of __________ the cross-section of a bar.
A B
Increasing reducing
. .
Answer & Explanation
Answer: Option B
8. During hot working of metals
A.poor surface finish is produced
B.scale is formed on the metal surface
C.close tolerances can not be maintained
D
all of these
.
Answer & Explanation
Answer: Option D
9. When a pattern is made in three parts, the __________ is known as a drag.
A
bottom part
.
B.middle part
C.top part
Answer & Explanation
Answer: Option A
10. Shrinkage allowance is made by adding to external dimensions and subtracting from internal
dimensions.
A.Agree B.Disagree
Answer & Explanation
Answer: Option A
11. A jolt machine is used to
A.ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
B.ram the sand harder at the back of the mould and softer on the pattern face
C.produce uniform sand hardness throughout the mould
D
produce uniform packing of sand in the mould
.
Answer & Explanation
Answer: Option A
12. If the sand is too fine, its permeability will be high.
A.True B.False
Answer & Explanation
Answer: Option B
13. Which of the following statement is wrong?
A.The mortise gauge has two scribing pins.
B.The gouges are chisels with a hollow shaped blade.
C.An auger is a planing tool
D
all of these
.
Answer & Explanation
Answer: Option C
14. In a compound die
A.only one operation is performed at each stroke of the ram
B.two or more operations are performed simultaneously at the single stroke of the ram
two or more cutting operations are performed at one station of the press in every stroke of the
C.
ram
D both cutting and non-cutting operations are performed at one station of the press in every stroke
. of the ram
Answer & Explanation
Answer: Option C
15. A file removes the metal during
A.forward stroke
B.return stroke
C.both forward and return strokes
D none of these
.
Answer & Explanation
Answer: Option A
16. In spot welding, the spacing between two spot weld should not be less than
A.D
B.1.5 d
C.3 d
D
6d
.
Answer & Explanation
Answer: Option C
17. Aluminum is the best material for making patterns because it is
A.light in weight
B.easy to work
C.corrosion resistant
D
all of these
.
Answer & Explanation
Answer: Option D
18. Gagger is used for cleaning the molding sand.
A.Correct B.Incorrect
Answer & Explanation
Answer: Option B
19. In sheet metal work, he cutting force on the tool can be reduced by
A.grinding the cutting edges sharp
B.increasing the hardness of tool
C.providing shear on tool
D
increasing the hardness of die
.
Answer & Explanation
Answer: Option A
20. In order to get uniform thickness of the plate by rolling process, one provides
A.camber on the rolls
B.offset on the rolls
C.hardening of the rolls
D
antifriction bearings
.
Answer & Explanation
Answer: Option C
21. A pouring basin acts as a reservoir for the molten metal.
A.Agree B.Disagree
Answer & Explanation
Answer: Option A
22. In bending operation, the metal takes the shape of a punch.
A.Yes B.No
Answer & Explanation
Answer: Option A
23. The cold working of metals is carried out
A.at the recrystallisation temperature
B.below the recrystallisation temperature
C.above the recrystallisation temperature
D
at any temperature
.
Answer & Explanation
Answer: Option B
24. Lancing is the operation of
A.cutting a sheet of metal in a straight line along the length
B.removal of metal to the desired shape from the edge of a plate
C.cutting a sheet of metal through part of its length and then bending the cut portion
D
bending a sheet of metal along a curved axis
.
Answer & Explanation
Answer: Option C
25. Notching is the operation of
A.cutting a sheet of metal in a straight line along the length
B.removal of metal to the desired shape from the edge of a plate
C.cutting a sheet of metal through part of its length and then bending the cut portion
D
bending a sheet of metal along a curved axis
.
Answer & Explanation
Answer: Option B
26. The shrinkage allowance for cast iron pattern is
A.10 mm/m
B.16 mm/m
C.20 mm/m
D
26 mm/m
.
Answer & Explanation
Answer: Option A
27. An oxidizing flame is obtained when equal volumes of oxygen and acetylene are supplied.
A.True B.False
Answer & Explanation
Answer: Option B
28. A neutral flame is obtained by supplying
A.equal volumes of oxygen and acetylene
B.more volume of oxygen and less volume of acetylene
C.more volume of acetylene and less volume of oxygen
D
none of the above
.
Answer & Explanation
Answer: Option A
29. An oxidising process used for aluminum and magnesium articles is called
A.galvanising B.anodising
C.parkerising D.sheradising
Answer & Explanation
Answer: Option B
30. For welding plates of thickness less than 5 mm, its edges
A.do not require bevelling
B.should be bevelled to a single-V or U-groove
C.should have a double-V or U-groove on one side
D
should have a double-V or U-groove on both sides
.
Answer & Explanation
Answer: Option A
31. In order to cut mild steel, the cutting angle of chisel should be
A.30° B.45°
C.50° D.60°
Answer & Explanation
Answer: Option D
32. The operation of straightening a curved sheet metal, is known as
A.Drawing B.squeezing
C.Coining D.planishing
Answer & Explanation
Answer: Option D
33. The correct sequence for preparing a billet for extrusion process is pickling, alkaline cleaning,
phosphate coating and lubricating with reactive soap.
A.Yes B.No
Answer & Explanation
Answer: Option A
34. Tandem drawing of wires and tubes is necessary because
A.it is not possible to reduce at one stage
B.annealing is needed between stages
C.accuracy in dimensions is not possible otherwise
D
surface finish improves after every drawing stage
.
Answer & Explanation
Answer: Option B
35. In a __________ , both cutting and non-cutting operations are performed at one station of the press
in every stroke of the ram.
A.simple die
B.progressive die
C.combination die
D
compound die
.
Answer & Explanation
Answer: Option C
36. Cold working requires much higher pressure that hot working.
A.Correct B.Incorrect
Answer & Explanation
Answer: Option A
37. The operation of bending a sheet of metal along a curved axis, is known as
A.Plunging B.notching
C.slitting D.forming
Answer & Explanation
Answer: Option D
38. In a __________ , two or more operations are performed simultaneously at the single stroke of the
ram.
A.simple die
B.progressive die
C.combination die
D
compound die
.
Answer & Explanation
Answer: Option B
39. A rip saw
A.is a two man saw
B.is used for cutting along the grains of wood
C.has a narrow blade with two wooden handles
D
all of the above
.
Answer & Explanation
Answer: Option B
40. The welding set up is said to have reversed polarity when the work is connected to the negative
terminal and the electrode holder to the positive terminal.
A.Agree B.Disagree
Answer & Explanation
Answer: Option A
41. For welding plates of thickness more than 12.5 mm, its edges
A.do not require bevelling
B.should be bevelled to a single-V or U-groove
C.should have a double-V or U-groove on one side
D
should have a double-V or U-groove on both sides
.
Answer & Explanation
Answer: Option D
42. In electric resistance welding, voltage required for heating is
A.1 to 5 volts
B.6 to 10 volts
C.11 to 20 volts
D
50 to 100 volts
.
Answer & Explanation
Answer: Option B
43. Most of the oxy-acetylene welding is done with
A.neutral flame
B.oxidising flame
C.carburising flame
D
all of these
.
Answer & Explanation
Answer: Option A
44. The cutting edge of a chisel should be
A.hardened
B.tempered
C.hardened and tempered
D
case hardened
.
Answer & Explanation
Answer: Option C
45. Scab is a casting defect which occurs as sand patches on the upper surface of a casting.
A.True B.False
Answer & Explanation
Answer: Option A
46. In order to check the clearance between two mating surfaces, a __________ gauge should be used.
A.ring B.plug
C.feeler
Answer & Explanation
Answer: Option C
47. When the weld is made from left to right, it is known as back-hand welding.
A.Agree B.Disagree
Answer & Explanation
Answer: Option A
48. The current in electric resistance welding can be regulated by
A.varying the input supply
B.changing the primary turns of the transformer
C.changing the secondary turns of the transformer
D
any one of the above
.
Answer & Explanation
Answer: Option B
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49. In a cold chamber die casting machine, only non-ferrous alloys with __________ are casted.
A.low melting temperature
B.high melting temperature
Answer & Explanation
Answer: Option B
50. A mortise gauge is a
A.striking tool
B.planing tool
C.boring tool
D
marking tool
.
Answer & Explanation
Answer: Option D
