When the dimension is expressed as 20 -0.025 ⁺⁰⁰³⁵, then the basic size is
20 mm
20.035 mm
20.025 mm
19.975 mm
Correct Answer :
A. 20 mm
Related Questions
The temperature at which the new grains are formed in the metal is called
Lower critical temperature
Upper critical temperature
Eutectic temperature
Recrystallisation temperature
In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.
Same
Less
More
None of these
The dowels are
Wooden nails
Box nails
Wire nails
None of these
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
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
The temperature of the inner luminous cone of neutral flame is about
1000°C
1250°C
2100°C
3200°C
The brass and bronze are welded by _________ flame.
Neutral
Oxidising
Carburising
All of these
The oxygen cylinder is usually painted with
Black colour
White colour
Maroon colour
Yellow colour
A gimlet is a ________ tool.
Boring
Marking
Cutting
None of these
In spot welding, the spacing between two spot weld should not be less than
d
1.5 d
3 d
6 d
A casting defect which occurs due to improper venting of sand is known as
Cold shuts
Blow holes
Shift
Swell
In a bilateral 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
In welding magnesium with TIG arc welding, direct current with _________ is used.
Straight polarity
Reversed polarity
Both (A) and (B)
None of these
The adhesiveness is the property of sand due to which
It evolves a great amount of steam and other gases
The sand grains stick together
It clings to the sides of a moulding box
None of these
The operation of straightening a curved sheet metal, is known as
Drawing
Squeezing
Coining
Planishing
Which of the following welding process uses non-consumable electrodes?
TIG welding
MIG welding
Manual arc welding
Submerged arc welding
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
In backhand welding, the angle between the welding torch and the work is kept as
30°-40°
40°-50°
50°-60°
60°-70°
During hot working of metals
Porosity of the metal is largely eliminated
Grain structure of the metal is refined
Mechanical properties are improved due to refinement of grains
All of the above
In forehand welding, the weld is made
From left to right
From right to left
First from left to right and then from right to left
Either from left to right or from right to left
Cold working of metal increases
Tensile strength
Yield strength
Hardness
All of these
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
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
In ________ welding, the weld may be made either from left to right or from right to left.
Forehand
Backhand
Vertical
None of these
Lap joints are employed on plates having thickness
Less than 3 mm
5 to 10 mm
12.5 mm
Above 25 mm
When more volume of acetylene and less volume of oxygen is supplied, then a ________ flame is obtained.
Neutral
Oxidising
Carburising
None of these
In welding copper alloys with TIG arc welding
Direct current with straight polarity is used
Direct current with reversed polarity is used
Alternating current is used
Any one of these
In a compound die
Only one operation is performed at each stroke of the ram
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 ram
Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram
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
In a hot chamber die casting machine
Ferrous alloys with low melting temperature are casted
Ferrous alloys with high melting temperature are casted
Nonferrous alloys with low melting temperature are casted
Nonferrous alloys with high melting temperature are casted