A. Copper
B. Magnesium
C. Both A. & B.
D. Neither A. nor B.
Related Mcqs:
- Duralumin is an alloy of_________________?
A. Aluminium, copper and manganese
B. Aluminium, nickel and silicon
C. Aluminium and nickel
D. None of these - Age hardening is concerned with_________________?
A. Copper
B. Brass
C. Duralumin
D. Silver - The increase in hardness of metal due to its cold working is termed as the _______________ hardening?
A. Work
B. Age
C. Induction
D. Flame - Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is _____________ percent?
A. 0.02
B. 0.2
C. 0.35
D. 0.5 - Work hardening of a material ________________?
A. Decreases its tensile strength
B. Decreases its ductility
C. Increases its ductility
D. Does not affect its ductility - ______________ is not a case hardening process?
A. Carburising
B. Nitriding
C. Cyaniding
D. Annealing - Hardening of steel is not possible unless it is heated ______________ critical point?
A. Above the highest
B. Above the lowest
C. Between the first & second
D. Between the second & third - The loss of strength in compression which occurs, when there is a gain of strength in tension due to over loading is called__________________?
A. Bauschinger effect
B. Hooke’s effect
C. Hysteresis
D. Relaxation - Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its___________________?
A. High strength to weight ratio
B. Low temperature strength properties
C. Its ability to be cast, rolled, forged & stamped
D. High strength and corrosion & oxidation-resistance at elevated temperature - The formation of oxide film on a metal due to atmospheric exposure reduces its____________?
A. Toughness
B. Stiffness
C. Creep limit
D. All A., B. & C.
