A. Fine grains
B. Coarse grains
C. Homogeneity
D. Dissolved elements (except cobalt)
Related Mcqs:
- The hardenability of steel decreases with__________________?
A. Decrease in dislocation density
B. Increase in solutionising temperature
C. Increase in strength
D. Decrease in grain size - Maximum hardenability of steel depends upon its_______________________?
A. Chemical composition
B. Carbon content
C. Grain size
D. Alloying elements content - Austempering of steel requires it to be heated to 875°C followed by sudden cooling to 250- 525°C, thereby changing austenite to___________________?
A. Sorbite
B. Bainite
C. Martensite
D. Troostite - High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from _______________ percent ?
A. 5 to 10
B. 15 to 25
C. 45 to 50
D. 75 to 80 - Cementite is in the lamellar form in the _____________________ phase of steel ?
A. Martenistic
B. Bainitic
C. Pearlitic
D. Ferritic - To improve the machinability of steel, it is generally subjected to _____________________?
A. Spheroidising
B. Tempering
C. Normalising
D. Annealing - Addition of _____________________ to steel does not impart hardness?
A. Nickel
B. Copper
C. Chromium
D. Silicon - Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of _______________ gms of zinc per m2 of steel strip ?
A. 5-10
B. 1000-1500
C. 120-500
D. 1500-3000 - Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal_________________?
A. Tensile strength
B. Compressive strength
C. Young’s modulus
D. Thermal co-efficient of expansion - The ‘transition temperature’ for ductile to brittle behavior of steel increases with increase in the _____________ content in steel?
A. Carbon
B. Manganese
C. Both A nor B
D. Neither A nor B
