Tungsten in steel________________?

A. improves wear resistance, cutting ability and toughness
B. refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
C. improves cutting ability and reduces hardenability
D. gives ductility, toughness, tensile strength and anticorrosion properties
E. raises its melting point

Related Mcqs:

Sulphur in steel________________?
A. acts as deoxidiser
B. reduces the grain size
C. decreases tensile strength and hardness
D. lowers the toughness and transverse ductility
E. increases hardness
Tungsten in high speed steel provides________________?
A. hot hardness
B. toughness
C. wear resistance
D. sharp cutting edge
E. cold hardness
Mild steel belongs to the following category___________________?
A. low carbon steel
B. medium carbon steel
C. high carbon steel
D. alloy steel
E. special steel
In malleable iron, carbon is present in the form of___________________?
A. cementite
B. free carbon
C. flakes
D. spheroids
E. nodular aggregates of graphite
Machining properties of steel are improved by adding___________________?
A. sulphur, lead, phosphorous
B. silicon, aluminium, titanium
C. vanadium, aluminium
D. chromium, nickel
E. lubricants
Cyaniding is the process of________________?
A. dipping steel in cyanide bath
B. reacting steel surface with cyanide salts
C. adding carbon and nitrogen by heat treatment of steel to increase its surface hardness
D. obtaining cyanide salts
E. making corrosion resistant steel
Super conduction by metals is observed in the temperature range of_________________?
A. below 10°K
B. above 100°K
C. around 0°C
D. around 100°C
E. above 1000°C
The following element can’t impart high strength at elevated temperature__________________?
A. manganese
B. magnesium
C. nickel
D. silicon
E. none of the above
Admiralty gun metal contains__________________?
A. 63 to 67% nickel and 30% copper
B. 88% copper, 10% tin and rest zinc
C. alloy of tin, lead and cadmium
D. iron scrap and zinc
E. none of the above
Monel metal contains_________________?
A. 63 to 67% nickel and 30% copper
B. 88% copper and 10% tin and rest zinc
C. alloy of tin, lead and cadmium
D. malleable iron and zinc
E. none of the above