Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism.
Fracture
Dislocation
Slip
Twinning
- Which of the following fastening devices has a head at one end and a nut fitted to the other?
- Atomic __________ of an element is a whole number.
- In case of a, centrifugal pump, the ratio h1/h2 is termed as the __________ efficiency (where, h1 =…
- Corrosion of metals cannot be prevented by its
- Lap joints are preferred over butt joints in soldering/brazing, because these joints are
- Removal of non-condensable from steam or other vapour is termed as the __________ process.
- Fire refining process is employed in case of
- Cold working of a material results in increase in hardness, which is termed as the __________ hardening.
- Steel balls are manufactured by
- Lead is poured into the joint between two __________ pipes.
- Pick out the wrong statement.
- Dryness fraction of dry steam is
- Pick out the correct statement about the condensation.
- A steam carrying pipeline is insulated with two layers of insulating materials with the inferior insulation…
- One of the methods of purification of leach liquor is ion exchange, which involves
- Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh.
- Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles…
- The most commonly used moderator in nuclear power plants is
- Cupola produces __________ iron.
- A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer…
- Which of the following is the correct nature of shear stress distribution along the cross section in…
- Which of the following low melting alloy containing bismuth and lead is used for electric fuse?
- Most important property of steels for use in automobile bodies is the
- Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition…
- The co-ordination number in simple cubic structure is
- Case hardening is not done by
- In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold…
- The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the…
- The atmospheric temperature during melting of ice/snow (in the atmosphere)
- Dies for wire drawing are generally made of