A. 80% or more iron
B. 50% or more iron
C. alloying elements like chromium, tungsten nickel and copper
D. elements like phosphorus, sulphur and silicon in varying quantities
E. high quantities of sulphur
Related Mcqs:
- The hardness of steel increases if it contains____________________?
A. austenite
B. martensite
C. pearlite
D. cementite
E. all of the above - Dow metal contains____________________?
A. 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
B. 92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg
C. 90% aluminium and 90% copper
D. 90% magnesium and 9% aluminium with some copper
E. 90% magnesium and 10% tin - Phosphor bronze contains____________________?
A. 0.5% of phosphorous
B. 1% phosphorous
C. 2.5% phosphorous
D. 5% phosphorous
E. none of the above - Hardness of steel depends on_________________?
A. amount of carbon it contains
B. the shape and distribution of the car-bides in iron
C. method of fabrication
D. contents of alloying elements
E. the quality of ore from which it is made - Depth of hardness of steel is increased by addition of_________________?
A. nickel
B. chromium
C. tungsten
D. vanadium
E. ell of the above - Corrosion resistance of steel is increased by addition of________________?
A. chromium and nickel
B. sulphur, phosphorus, lead
C. vanadium, aluminium
D. tungsten, molybdenum, vanadium, chromium
E. zinc - A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as_________________?
A. allotropic change
B. recrystallisation
C. heat treatment
D. precipitation
E. austempering - Tungsten in high speed steel provides________________?
A. hot hardness
B. toughness
C. wear resistance
D. sharp cutting edge
E. cold hardness - Cold rolled steel sheets contain carbon of the following order___________________?
A. 0.1%
B. 0.2%
C. 0.4%
D. 0.6%
E. 0.8% - Steel made from phosphatic iron is_________________?
A. brittle
B. hard
C. ductile
D. tough
E. malleable
