What is the correct answer?


During hot working of metals,

A. Porosity of the metal is largely eliminated

B. Grain structure of the metal is refined

C. Mechanical properties are improved due of refinement of grains

D. All of the above

Correct Answer :

D. All of the above

Related Questions

A chain drive transmits __________ power as compared to belt drive. In a belt drive, if the pulley diameter is doubled keeping the tension… Cast iron pipes are mainly used When a close coiled helical spring is compressed, its wire is subjected… A fast and loose pulley drive is used when A sliding bearing which operates without any lubricant present, is called In V-belt drive, belt touches When compared to the rod of the same diameter and material, a wire rope A key way lowers Which of the following has threads at both ends? The draw of cotter should not be more than If a spring is cut down into two springs, the stiffness of cut springs… Which of the following is not correct procedure to increase the fatigue… The ball bearings are, usually, made from In a steam engine, the piston rod is usually connected to the crosshead… The speed of the sprocket reduces as the chain pitch __________ for a… The strap end of a connecting rod of steam engine is joined by Creep in belt is due to Which of the following spring is used in mechanical wrist watch? The material used for brake lining should have __________ coefficient… An open coiled helical compression spring 'A' of mean diameter 50 mm is… When the belt is transmitting maximum power, The rivet head used for boiler plate riveting is usually The material commonly used for machine tool bodies is Which of the following material has the maximum ductility? For a shaft diameter of 100 mm, the number of bolts in a flange coupling… If the centre distance of the mating gears having involute teeth is varied… In order to have a connecting rod equally strong in buckling about X-axis… Two rigid plates are clamped by means of bolt and nut with an initial… For a shoe brake, the equivalent coefficient of friction is equal to (where…