In permanent mould casting method
Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition
Molten metal is poured and allowed to solidify while the mould is revolving
Molten metal is forced into mould under high pressure
None of the above
Correct Answer :
D. None of the above
Related Questions
Lap joints are employed on plates having thickness
Less than 3 mm
5 to 10 mm
12.5 mm
Above 25 mm
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
In a centrifugal casting method
Core is made of sand
Core is made of ferrous metal
Core is made of nonferrous metal
No core is used
The algebraic difference between the minimum limit and the basic size is called
Actual deviation
Upper deviation
Lower deviation
Fundamental deviation
The process extensively used for making bolts and nuts is
Hot piercing
Extrusion
Cold peening
Cold heading
Thread rolling is restricted to
Ferrous materials
Ductile materials
Hard materials
None of these
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
Thermit welding is often used in
Replacing broken gear teeth
Repairing broken shears
Joining rails, truck frames and locomotive frames etc.
All of the above
The acetylene cylinder is usually painted with
Black colour
White colour
Maroon colour
Yellow colour
The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called
Shearing
Piercing
Punching
Blanking
When filing soft metals, the file teeth are clogged with minute particles of metal. The file should be cleaned by
Washing it with water
Rubbing on wood
Washing it with dilute acid
Using file card
Projection welding is a
Continuous spot welding process
Multi-spot welding process
Arc welding process
Process used for joining round bars
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
Lancing is the operation of
Cutting a sheet of metal in a straight line along the length
Removal of metal to the desired shape from the edge of a plate
Cutting a sheet of metal through part of its length and then bending the cut portion
Bending a sheet of metal along a curved axis
The type of file used for a wood work is
Single cut file
Double cut file
Rasp cut file
Any one of these
In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.
Same
Less
More
None of these
In order to cut mild steel, the cutting angle of chisel should be
30°
45°
50°
60°
Aluminium is the best material for making patterns because it is
Light in weight
Easy to work
Corrosion resistant
All of these
For welding plates of thickness less than 5 mm, its edges
Do not require bevelling
Should be bevelled to a single-V or U-groove
Should have a double-V or U-groove on one side
Should have a double-V or U-groove on both sides
The accuracy of micrometers, calipers, dial indicators can be checked by a
Feeler gauge
Slip gauge
Ring gauge
Plug gauge
The temperature at which the new grains are formed in the metal is called
Lower critical temperature
Upper critical temperature
Eutectic temperature
Recrystallisation temperature
A moving mandrel is used in
Wire drawing
Tube drawing
Metal cutting
Forging
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
The property of sand due to which it evolves a great amount of steam and other gases is called
Collapsibility
Permeability
Cohesiveness
Adhesiveness
Thermit, used in Thermit welding, is a mixture of
Charcoal and iron oxide
Charcoal and aluminium
Iron oxide and aluminium
Charcoal, iron oxide and aluminium
The minimum size of a bloom is
5 cm × 5 cm
10 cm × 10 cm
15 cm × 15 cm
20 cm × 20 cm
A zinc diffusion process is called
Galvanising
Anodising
Parkerising
Sherardizing
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
A two high rolling mill consists of two rolls which rotate
At the same speed and in the same direction
At the same speed but in opposite direction
At different speeds and in the same direction
At different speeds and in the opposite direction
An oxidising process used for aluminium and magnesium articles is called
Galvanising
Anodising
Parkerising
Sherardizing