A. 6-8
B. 18-20
C. 30-35
D. 50-55
Related Mcqs:
- ______________ can replace tungsten in high speed steel ?
A. Chromium
B. Vanadium
C. Cobalt
D. Molybdenum - Chrome vanadium steels usually contain 0.8 to 1.1% Cr, 0.25 to 0.35% C and < 0.25% V. It is ______________________?
A. Used for making axle & shafts of aeroplanes, automobiles and locomotives
B. Having poor fatigue resistance
C. Having poor toughness
D. Not helpful in producing cleaner steel due to oxidising action of vanadium - Which of the following has a very high carbide forming tendency in steels ?
A. Silicon
B. Chromium
C. Nickel
D. Vanadium - Addition of tungsten to steel imparts___________________?
A. Magnetic properties
B. Cutting hardness
C. Corrosion resistance
D. Ductility - Ferric stainless steels compared to austenitic stainless steels________________?
A. Have lower corrosion resistance
B. Are harder to fabricate
C. Are less ductile and hence less suitable for cold pressing
D. All A., B. and C. - Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines ?
A. Silicon steel
B. Chromium steel
C. Molybdenum steel
D. None of these - Which of the following alloy steels is the most suitable for making gun barrels and projectiles ?
A. Tungsten steel
B. Molybdenum steel
C. Nickel-chrome steel
D. Cobalt steel - Which of the following stainless steels is non-magnetic ?
A. Ferritic
B. Martenistic
C. Austenitic
D. None of these - Shock resisting steels should possess high___________________?
A. Hardness
B. Toughness
C. Tensile strength
D. Wear resistance - Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si)___________________?
A. Do not require heat treatment for any of its applications
B. Are used for leaf and coiled springs
C. Do not have good resilience properties
D. Is tempered at 850°C
