Description : Drills are usually made of (A) Cermets (B) High speed steel (C) Alloy steel (D) Tungsten carbide
Last Answer : Option B
Description : Powder metallurgy technique is used in the production of __________ tools. (A) Tungsten carbide (B) High carbon steel (C) High speed steel (D) Drilling
Last Answer : Option A
Description : __________ is the trade name assigned to a non-ferrous cast alloy composed of cobalt, chromium & tungsten. (A) Stellite (B) High speed steel (C) Cermet (D) Alnico
Description : 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
Description : In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet? (A) Zirconia (B) Alumina (C) Bakelite (D) Tungsten carbi
Last Answer : Option D
Description : Which of the following has the highest modulus of elasticity (about 7 × 106 kg/cm2)? (A) High speed steel (B) Stainless steel (C) Tungsten carbide (D) Superalloys
Last Answer : (C) Tungsten carbide
Description : Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of (A) 90% tungsten carbide and 10% cobalt (B) 70% aluminium oxide & 30% silica (C) 30% nickel, 15% chromium & 55% tungsten (D) 65% tungsten & 35% zirconium
Description : Which of the following is the most wear resistant grade of carbide used for the cutting tools? (A) Aluminium carbide (B) Tungsten carbide (C) Nickel carbide (D) Iron carbid
Description : Which of the following is the most wear resistant grade of carbide used for the cutting tools? (A) Aluminium carbide (B) Tungsten carbide (C) Nickel carbide (D) Iron carbide
Description : Stellite is a __________ material. (A) Ferrous (B) Ceramic (C) Cemented carbide (D) Non-ferrous cast alloy cutting tool
Last Answer : (D) Non-ferrous cast alloy cutting tool
Description : Constituents of stellite are (A) Zinc, copper and nickel (B) Cobalt, chromium and tungsten (C) Zinc, aluminium and nickel (D) Nickel, cobalt and vanadium
Last Answer : (B) Cobalt, chromium and tungsten
Description : Constituents of stellite are (A) Zinc, copper & nickel (B) Cobalt, chromium & tungsten (C) Zinc, aluminium & nickel (D) Nickel, cobalt & vanadium
Last Answer : (B) Cobalt, chromium & tungsten
Description : _________ is the hardest material out of the following. (A) Boron carbide (B) Tungsten carbide (C) Hardened steel (D) Silicon carbide
Last Answer : (A) Boron carbide
Description : Cermets are used for making (A) Cutting tools (B) Abrasives (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
Description : Cemented carbide tools are not suitable for cutting (A) Aluminium (B) Brass (C) Cast iron (D) Steel
Last Answer : (A) Aluminium
Description : Highest cutting speed is achieved by the __________ tool material. (A) High speed steel (B) Carbide (C) Cast alloy (D) Plain carbon steel
Last Answer : (B) Carbide
Description : Are tungsten carbide prices going up?
Last Answer : I use tungsten carbide burrs on my rotary grinder and they have not changed in price in the last couple of years. I didn’t know they made jewelry out of tc, is it pretty?
Description : __________ can replace tungsten in high speed steel, (A) Chromium (B) Vanadium (C) Cobalt (D) Molybdenum
Last Answer : (D) Molybdenum
Description : Which of the following alloying elements is present in maximum percentage in high speed steel? (A) Molybdenum (B) Chromium (C) Tungsten (D) Vanadium
Last Answer : (C) Tungsten
Description : Hypersil' is a __________ steel. (A) High speed (B) Silicon (C) Molybdenum (D) Tungsten
Last Answer : (B) Silicon
Description : 18-4-1 high speed steel contains 18%, 4% and 1% respectively of (A) Tungsten, vanadium and chromium (B) Tungsten, chromium and vanadium (C) Vanadium, chromium and tungsten (D) Chromium, tungsten and vanadium
Last Answer : (B) Tungsten, chromium and vanadium
Description : __________ can replace tungsten in high speed steel. (A) Chromium (B) Vanadium (C) Cobalt (D) Molybdenum
Last Answer : (C) Cobalt
Last Answer : (A) Molybdenum
Description : Stainless steel is welded with difficulty because of (A) Its high melting temperature (B) Chances of cracking (C) Oxide film formation (D) Chromium carbide formation
Last Answer : Option C
Description : Pick out the wrong statement. (A) A ferromagnetic material becomes paramagnetic above the 'Curie temperature' (B) Permanent magnets are made of hard materials, whereas electromagnets require soft ... hysterisis loss and coercive forces (D) Tungsten steel and alnico are not hard magnetic materials
Description : Binding material used in cemented carbide tools is : (A) Nickel (B) Cobalt (C) Chromium (D) Silicon
Last Answer : Binding material used in cemented carbide tools is : Cobalt
Description : Which of the following is not used as the ceramic material in ‘cermets’? (A) Silicides (B) Oxides (C) Carbides (D) Nitrides
Last Answer : (D) Nitrides
Description : Cermets are __________ materials. (A) Refractory (B) Reinforced (C) Abrasive (D) Fully metallic
Last Answer : (A) Refractory
Description : Combination of metals and ceramics are called (A) Metalloy (B) Cermets (C) Pellets (D) Non-crystalline ceramics
Last Answer : (B) Cermets
Description : Which of the following is not used as a bearing material? (A) Copper-lead alloys (B) Babbitts (C) Bronzes (D) Cermets
Description : High speed steel tools retain their hardness upto a temperature of __________ °C. (A) 500 (B) 750 (C) 900 (D) 1100
Last Answer : (C) 900
Description : Carbon is present in the combined form (carbide) in case of (A) Pig iron (B) Steel (C) Ferroalloys (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Decarburisation of steel (A) Is the removal of carbon from iron carbide (Fe3C) (B) Affects its crystalline structure (C) Is favoured by CO2 (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Clock pendulums are usually made of __________ steel. (A) High speed (B) Stainless (C) Heat resisting (D) None of these
Last Answer : (D) None of these
Description : Beams of hyperbolic cooling towers are made up of a) Tungsten b) Iron c) Stainless steel d) Brass
Last Answer : c) Stainless steel
Description : What is stellite ?
Last Answer : It is a non-ferrous cast alloy containing cobalt, chromium and tungsten.
Description : High speed cutting tool steels contain about __________ percent of tungsten. (A) 6-8 (B) 18-20 (C) 30-35 (D) 50-55
Last Answer : (B) 18-20
Description : 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
Last Answer : (C) Nickel-chrome steel
Description : Residual magnetism in steel for magnets is increased by the addition of (A) Nickel (B) Cobalt (C) Tungsten (D) Chromium
Last Answer : (B) Cobalt
Description : Addition of tungsten to steel imparts (A) Magnetic properties (B) Cutting hardness (C) Corrosion resistance (D) Ductility
Last Answer : (B) Cutting hardness
Description : Corrosion resistance of steel is increased by the addition of (A) Phosphorous and tungsten (B) Nickel and chromium (C) Lead and vanadium (D) Molybdenum and tungsten
Last Answer : (B) Nickel and chromium
Description : Addition of __________ in steel can help in increasing the depth of hardness. (A) Nickel (B) Chromium (C) Vanadium (D) Tungsten
Last Answer : (D) Tungsten
Description : Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets. (A) Chromium (B) Nickel (C) Tungsten (D) Cobalt
Last Answer : (D) Cobalt
Description : Pick out the wrong statement. (A) Metal/alloys having hexagonal crystal lattice structure are less malleable than those having cubic crystal lattice structure (B) Metal/alloys having body centred cubic ... D) Both ferritic & austenitic stainless steel has a face centred cubic (fcc) crystal structure
Last Answer : (C) Tungsten has a body centred cubic (bcc) crystal lattice structure
Description : Addition of __________ in steel is helpful in increasing the depth of hardness. (A) Chromium (B) Sulphur (C) Vanadium (D) Tungsten
Last Answer : (A) Chromium
Description : Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel. (A) Wrought (B) Tool (C) Alloy (D) Plain carbon
Last Answer : (D) Plain carbon
Description : Ceramic recuperators are generally made of (A) Silicon carbide (B) Calcium carbide (C) Fireclay bricks (D) High alumina bricks
Last Answer : (A) Silicon carbide
Description : Which of the following defects is usually associated with the MAG GMAW) welding process when using Dip Transfer? a) Centerline cracking b) Lack of side wall Fusion c) Undercut d) Tungsten inclusions
Last Answer : b) Lack of side wall Fusion
Description : A composite wire is prepared by joining a tungsten wire and steel wire end to end. Both the wires are of the same
Last Answer : A composite wire is prepared by joining a tungsten wire and steel wire end to end. Both the wires are of ... 1011 Pa, YTungsten = 4.11 1011 Pa]