The algebraic difference between the minimum limit and the basic size is called
Actual deviation
Upper deviation
Lower deviation
Fundamental deviation
Correct Answer :
C. Lower deviation
Related Questions
Scribing block is used to
Hold the round bars during marking
Check the trueness of flat surfaces
Locate the centres of round bars
Check the surface roughness
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
The blank diameter used in thread rolling will be
Equal to minor diameter of the thread
Equal to pitch diameter of the thread
A little larger than the minor diameter of the thread
A little larger than the pitch diameter of the thread
The tolerance produced by shell moulding process of casting is
+0.05 mm
±0.2 mm
+0.5 mm
±1 mm
A pattern maker's shrinkage rule considers
All pattern allowances
Only shrinkage allowance
All materials to be cast
All materials of the pattern
A basic hole is one whose
Lower deviation is zero
Upper deviation is zero
Lower and upper deviations are zero
None of these
The property of sand due to which it evolves a great amount of steam and other gases is called
Collapsibility
Permeability
Cohesiveness
Adhesiveness
The operation of cutting a sheet of metal in a straight line along the length, is known as
Plunging
Notching
Slitting
Forming
In a simple die
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
None of the above
The maximum flame temperature occurs
At the outer cone
At the inner cone
Between the outer and inner cone
At the torch tip
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
The welding process used in joining mild steel shanks to high speed drills, is
Spot welding
Seam welding
Flash butt welding
Upset butt welding
A rip saw
Is a two man saw
Is used for cutting along the grains of wood
Has a narrow blade with two wooden handles
All of the above
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
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 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
In backhand welding, the angle between the welding rod and the work is ________ as compared to forehand welding.
Same
Less
More
None of these
The recrystallisation temperature of steel is
400°C
600°C
800°C
None of these
The machining allowance provided on patterns depends upon
Type of casting metal
Size and shape of casting
Method of casting used
All of these
The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as
Hot piercing
Extrusion
Cold peening
Cold heading
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
In a cold chamber die casting machine, only nonferrous alloys with _________ are casted.
Low melting temperature
High melting temperature
Both (A) and (B)
None of these
Which of the following methods can be used for manufacturing 2 metre long seamless metallic tubes?
Drawing
Extrusion
Rolling
Extrusion and rolling
Acetylene gas is stored in cylinders in
Solid form
Gaseous form
Liquid form
Any one of these
The sand used for making cores is
Green sand
Dry sand
Loam sand
Oil sand
A jolt machine is used to
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
Ram the sand harder at the back of the mould and softer on the pattern face
Produce uniform sand hardness throughout the mould
Produce uniform packing of sand in the mould
In electric resistance welding, voltage required for heating is
1 to 5 volts
6 to 10 volts
11 to 20 volts
50 to 100 volts
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
The material which can be best cut with oxygen cutting process is
Mild steel
Brass
Copper
Aluminium
During drawing operation, the states of stress in cup would include
Compressive stress in the flange
Tensile stress in the wall
Both (A) and (B)
None of these