A gimlet is a ________ tool.
Boring
Marking
Cutting
None of these
Correct Answer :
A. Boring
Related Questions
The recrystallisation temperature of steel is
400°C
600°C
800°C
None of these
For smoothing and cleaning out depressions in the mould, a __________ is used.
Slick
Lifter
Swab
Gagger
In spot welding, the spacing between two spot weld should not be less than
d
1.5 d
3 d
6 d
Piercing is an operation of cutting
A cylindrical hole in a sheet of metal by the punch and the die
A hole (other than cylindrical) in a sheet of metal by the punch and the die
A flat sheet to the desired shape
A number of holes evenly spaced in a regular pattern on a sheet of metal
For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank should be approximately
42 mm
44 mm
46 mm
48 mm
In piercing operation, the clearance is provided on
Punch
Die
Half on the punch and half on the die
Either on punch or die depending upon designer's choice
The width of slot cut by a hacksaw blade is _______ the width of the blade.
Equal to
Less than
Greater than
None of these
The edge of a steel plate cut by oxygen cutting will get hardened when the carbon content is
Less than 0.1 percent
Less than 0.3 percent
More than 0.3 percent
Anywhere between 0.1 to 1 percent
The centrifugal casting method, is used for casting articles of
Symmetrical shape about vertical axis
Symmetrical shape about horizontal axis
Irregular shape
Nonferrous metal only
The purpose of a riser is to
Deliver molten metal into the mould cavity
Act as a reservoir for the molten metal
Feed the molten metal to the casting in order to compensate for the shrinkage
Deliver the molten metal from pouring basin to gate
Carburising flame is used to weld
Steel, cast iron, copper, aluminium etc
Brass and bronze
Hard surfacing materials such as stellite
All of these
The draft or taper allowance on casting is generally
1 to 2 mm/m
2 to 5 mm/m
5 to 10 mm/m
10 to 15 mm/m
The cold chisels are made by
Drawing
Rolling
Piercing
Forging
The increase in hardness due to cold working, is called
Age hardening
Work hardening
Induction hardening
Flame hardening
The metal is subjected to mechanical working for
Refining grain size
Reducing original block into desired shape
Controlling the direction of flow lines
All of these
A zinc diffusion process is called
Galvanising
Anodising
Parkerising
Sherardizing
The operation of cutting of a flat sheet to the desired shape is called
Shearing
Piercing
Punching
Blanking
Spot welding is used for welding
Lap joints in plates having 0.025 mm to 1.25 mm thickness
Lap joints in plates having thickness above 3 mm
Butt joints in plates having 0.025 mm to 1.25 mm thickness
Butt joints in plates having thickness above 3 mm
In sheet metal work, he cutting force on the tool can be reduced by
Grinding the cutting edges sharp
Increasing the hardness of tool
Providing shear on tool
Increasing the hardness of die
In order to produce uniform packing of sand in the moulds, a __________ is used.
Sand slinger
Squeezing machine
Jolt machine
Stripper plate machine
In spot welding, the distance between the nearest edge of the plate and centre of weld should be equal to
d
1.5d
3d
6d
A ring gauge is used to
Check the diameter of shafts or studs
Test the accuracy of holes
Check the clearance between two mating surfaces
All of the above
4.Linde welding uses
Neutral flame and rightward technique
Oxidising flame and leftward technique
Neutral flame and leftward technique
Carburising flame and rightward technique
A casting defect which results in general enlargement of a casting is known as
Shift
Sand wash
Swell
Scab
The teeth of hacksaw blade are bent
Towards right
Towards left
Alternately towards right and left and every third or fourth left straight
May be bent in any direction
V-block is used to
Check the trueness of flat surfaces
Locate centres of round rods
Check the surface roughness
None of these
The sand used for making cores is
Green sand
Dry sand
Loam sand
Oil sand
The minimum size of a bloom is
5 cm × 5 cm
10 cm × 10 cm
15 cm × 15 cm
20 cm × 20 cm
Seam welding is best adopted for metal thickness ranging from
0.025 to 3 mm
3 to 5 mm
5 to 8 mm
8 to 10 mm
The chisel used for cutting key ways is
Flat chisel
Cape chisel
Round nose chisel
Diamond pointed chisel