Which of the following material can be used for making patterns?
Aluminium
Wax
Lead
All of these
Correct Answer :
D. All of these
Related Questions
The cross-section of a chisel is usually
Rectangular
Square
Hexagonal
Octagonal
A taper provided on the pattern for its easy and clean withdrawal from the mould is known as
Machining allowance
Draft allowance
Shrinkage allowance
Distortion allowance
In order to produce uniform packing of sand in the moulds, a __________ is used.
Sand slinger
Squeezing machine
Jolt machine
Stripper plate machine
The instrument which has all the features of try-square, bevel protractor, rule and scriber, is
Outside micrometer
Inside micrometer
Depth gauge micrometer
Combination set
A casting defect which results in general enlargement of a casting is known as
Shift
Sand wash
Swell
Scab
In die casting, machining allowance is
Small
Large
Very large
Not provided
In a ________, two or more operations are performed simultaneously at the single stroke of the ram.
Simple die
Progressive die
Combination die
Compound die
Which of the following statement is wrong?
The mortise gauge has two scribing pins
The gouges are chisels with a hollow shaped blade
An auger is a planing tool
All of these
A neutral flame is obtained by supplying
Equal volumes of oxygen and acetylene
More volume of oxygen and less volume of acetylene
More volume of acetylene and less volume of oxygen
None of the above
In shielded arc welding
Large electrode is used
Welding rod coated with slag is used
Welding rod coated with fluxing material is used
None of the above
Extrusion
Is extensively used for making bolts and nuts
Is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work
Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface
Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part
The difference between the upper limit and lower limit of a dimension is called
Nominal size
Basic size
Actual size
Tolerance
The operation of producing cup shaped parts from flat sheet metal blanks by bending and plastic flow of metal, is known as
Drawing
Squeezing
Coining
Planishing
According to Indian standards, the total numbers of tolerance grades are
8
12
18
20
The surface to be machined is marked on the pattern by
Red colour
Yellow colour
Black colour
Blue colour
In a cold chamber die casting machine
Melting pot is separate from the machine
Melting pot is an integral part of the machine
Melting pot may have any location
Low temperature and pressure is used
In submerged arc welding, an arc is produced between a
Carbon electrode and the work
Metal electrode and the work
Bare metal electrode and the work
Two tungsten electrodes and the work
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
The metal extrusion process is generally used for producing
Uniform solid sections
Uniform hollow sections
Uniform solid and hollow sections
Varying solid and hollow sections
Cores are used to
Form internal cavities in the casting
Improve mould surface
Form a part of a green sand mould
All of these
In a unilateral system of tolerance, the tolerance is allowed on
One side of the actual size
One side of the nominal size
Both sides of the actual size
Both sides of the nominal size
According to Indian standard specifications, 100 H6/g 5 means that.
Basic size is 100 mm
Actual size is 100 mm
Difference between the actual size and basic size is 100 mm
None of the above
When a hole or cavity to be cored is not in line with the parting surface, then a ________ is used.
Horizontal core
Vertical core
Drop core
Balanced core
The operation of bending a sheet of metal along a curved axis, is known as
Plunging
Notching
Slitting
Forming
In average work, the tolerance produced by investment casting method is
±0.05 mm
+0.2 mm
+05 mm
+1 mm
When the molten metal is fed in the cavity of a metallic mould by gravity, the method of casting is known as
Die casting method
Slush casting method
Permanent mould casting method
Centrifugal casting method
The welding process used to join the ends of two pipes of uniform cross-section, is
Spot welding
Seam welding
Projection welding
Upset butt welding
The acetylene cylinder is usually painted with
Black colour
White colour
Maroon colour
Yellow colour
In blanking 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
During hot working of metals
Poor surface finish is produced
Scale is formed on the metal surface
Close tolerances cannot be maintained
All of these