Que:-. The material which can be best cut with oxygen cutting process is
A.mild steel
Que:-. In fore hand welding, the weld is made
B.from right to left
Que:-. In spot welding, the distance between the nearest edge of the plate and centre of weld should be equal to
B.1.5 d
Que:-. Thermit, used in thermit welding, is a mixture of
C.iron oxide and aluminium
Que:-. The width of slot cut by a hacksaw blade is __________ the width of the blade.
C.greater than
Que:-. Cutting and forming operations can be performed in a single operation in a
Combination die
Que:-. The cold chisels are made from
D.cast tool steel
Que:-. A ring gauge is used to
A.check the diameter of shafts or studs
Que:-. A casting defect which results in general enlargement of a casting is known as
C.swell
Que:-. The operation of cutting a number of holes evenly spaced in a regular pattern on a sheet of metal is. called
perforating.
Que:-. The electron beam welding can be carried out in
C.vacuum
Que:-. In tungsten inert gas arc welding, a __________ electrode is used.
B.non consumable
Que:-. The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called
Piercing
Que:-. In die casting, machining allowance is
D.not provided
Que:-. The welding set up is said to have straight polarity, when
A.work is connected to the positive terminal and the electrode holder to the negative terminal
Que:-. A moving mandrel is used in
B.tube drawing
Que:-. The most preferred process for casting gas turbine blades is
B.shell moulding
Que:-. The upsetting is a process of
A.increasing the cross section of a bar
Que:-. Which of the following material can be used for making patterns ?
A.Aluminium
B.Wax
C.Lead D.all of these
Que:-. According to Indian standards, the total number of tolerance grades are
C.18
Que:-. Loam sand is a mixture of
B.50% sand and 50% clay
Que:-. The oxy-acetylene gas used in gas welding produce a flame temperature of
D.3200°C
Que:-. The process extensively used for making bolts and nuts is
D.cold heading
Que:-. A sand employed on the faces of the pattern before moulding, is called
D.parting sand
Que:-. The minimum size of a bloom is
C.15 cm x 15 cm
Que:-. The binder commonly used in making oil sand, is
B.organic type binder
Que:-. The casting method adopted for ornaments and toys of non ferrous alloys, is
B.slush casting
Que:-. In a cold chamber die casting machine
A.melting pot is separate from the machine
Que:-. Structural sections such as rails, angles, I beams are made by
A.hot rolling
Que:-. In welding magnesium with TIG arc welding, direct current with
__________ is used.
B.reversed polarity
Que:-. Linde welding uses
D.carburising flame and right ‐ward technique
Que:-. The purpose of a gate is to
A.deliver molten metal into the mould cavity
Que:-. A hacksaw blade cuts on the
A.forward stroke
Que:-. The oxygen cylinder is usually painted with
A.black colour
Que:-. Which of the following welding method uses a pool of molten metal?
B.Submerged arc welding (SAW)
Que:-. Galvanising is a
B.process of coating zinc by hot dipping
Que:-. In a four high rolling mill, there are four rolls out of which
B.two are working rolls and two are backing up rolls
Que:-. In __________ welding, the weld may be made either from left to right or from right to left.
C.vertical
Que:-. In arc welding, the electric arc is produced between the work and the electrode by
C.contact resistance
Que:-. In a centrifugal casting method
D.no core is used
Que:-. The draft or taper allowance on casting is generally
A.1 to 2 mm/m
Que:-. In a bilateral system of tolerance, the tolerance is allowed on
D.both sides of the nominal size
Que:-. In a hot chamber die casting machine
C.non ferrous alloys with low melting temperature are casted
Que:-. The chisel used for cutting key ways is
B.cape chisel
Que:-. The temperature at which the new grains are formed in the metal is called
D.recrystallisation temperature
Que:-. Thread rolling is restricted to
Ductile materials
Que:-. In sheet metal blanking, shear is provided on punches and dies so that
A.press load is reduced
Que:-. In welding copper alloys with TIG arc welding
A.direct current with straight polarity is used
Que:-. The algebraic difference between the minimum limit and the basic size is called
C.lower deviation
Que:-. Which of the following methods can be used for manufacturing 2 metre long seamless metallic tubes?
D.Extrusion and rolling
Que:-. The fullers are used
B.for necking down a piece of work
Que:-. The cold chisels are made by
D.forging
Que:-. The property of sand due to which it evolves a great amount of steam and other gases is called
B.permeability
Que:-. The centrifugal casting method, is used for casting articles of
B.symmetrical shape about horizontal axis
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