A. 500
B. 750
C. 900
D. 1100
Related Mcqs:
- The ability of tool steel to resist softening at high temperatures is termed as __________________ hardness?
A. Red
B. Extended
C. Super
D. Extreme - Mho’s scale of hardness, which consists of 10 standard minerals is used for the measurement of _______________ hardness?
A. Scratch
B. Indentation
C. Dynamic
D. Rebound - _____________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C ?
A. Veneering
B. Galvanising
C. Electroplating
D. Calorising - Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the ______________ temperature of air?
A. Wet bulb
B. Dry bulb
C. Saturation
D. Dew point - Addition of _____________________ to steel does not impart hardness?
A. Nickel
B. Copper
C. Chromium
D. Silicon - All of the following alloying elements of steel increases hardness but sacrifice ductility, except________________?
A. Nickel
B. Vanadium
C. Molybdenum
D. Chromium - Maximum change in the hardness of martensite occurs in the carbon content range of _____________ percent in steel?
A. 0.01 to 0.10
B. 0.2 to 0.4
C. 0.5 to 0.7
D. 0.8 to 1.0 - 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 - Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are____________________?
A. Nickel, cobalt & chromium
B. Tungsten, chromium & cobalt
C. Manganese, chromium & cobalt
D. Tungsten, molybdenum & nickel - Which of the following alloying elements is present in maximum percentage in high speed steel ?
A. Molybdenum
B. Chromium
C. Tungsten
D. Vanadium
