Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot
Piercing
Spinning
Drawing
Extrusion
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- Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same…
- A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C.…
- Screws are specified by their __________ diameters.
- Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature…
- A material in which the atoms are arranged regularly in some directions but not in others, is termed…
- The starting of a car takes time in winter, because the
- The units of the rate constant for a second order reaction are
- Co-efficient of performance of a Carnot cycle refrigerator operating between - 23°C and + 27°C…
- The stress at which extension of the material takes place more rapidly as compared to the increase in…
- The only suitable method for hardening the low carbon steel is case hardening. Which of the following…
- Carbon is present in the form of __________ in grey cast iron.
- Calorific value of __________ are almost same.
- Fire refining process is employed in case of
- __________ test is the appropriate test to determine whether a material is ductile or brittle.
- Which one of the following is incombustible?
- As the fluid flow rate increases, the float of the Rotameter
- Recrystallisation temperature of steel is __________ °C.
- Non-ferrous alloys used for making cutting tools need not have high
- Viscoelastic behaviour is observed in __________ materials.
- 'Flare tower' used in industry is meant for
- Lap joints are preferred over butt joints in soldering/brazing, because these joints are
- The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used.…
- Hydrogen can be
- Pick out the correct combination about the role of various additives used in polymers.
- Electrochemical corrosion can occur, only if __________ is present in contact with metal.
- For a spontaneous natural process at constant temperature and pressure, the free energy of the system…
- Blow off cock is provided in steam boiler to
- Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)
- The substance used as a smoke screen in warfare is
- Pick out the wrong statement.